{"id":2502,"date":"2026-07-23T14:12:07","date_gmt":"2026-07-23T06:12:07","guid":{"rendered":"https:\/\/jeez-semicon.com\/?p=2502"},"modified":"2026-07-23T14:12:07","modified_gmt":"2026-07-23T06:12:07","slug":"tungsten-cmp-slurry-the-complete-technical-and-procurement-guide","status":"publish","type":"post","link":"https:\/\/jeez-semicon.com\/zh\/blog\/tungsten-cmp-slurry-the-complete-technical-and-procurement-guide\/","title":{"rendered":"Tungsten CMP Slurry: The Complete Technical and Procurement Guide"},"content":{"rendered":"<style>\n\/* ============================================================\n   JEEZ \u2014 Tungsten CMP Slurry Pillar Page\n   Class prefix: jcms-\n   ============================================================ *\/\n.jcms-wrap{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;color:#1a2332;line-height:1.82;font-size:17px;max-width:900px;margin:0 auto;padding:0 2px}\n.jcms-wrap 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0}\n.jcms-related-title{font-size:13px;font-weight:800;text-transform:uppercase;letter-spacing:0.1em;color:#5b6b82;margin-bottom:16px}\n.jcms-related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px}\n.jcms-related-item{background:#f5f8fd;border:1px solid #dde8f5;border-radius:8px;padding:14px 16px;text-decoration:none;display:block;transition:border-color .18s,background .18s}\n.jcms-related-item:hover{border-color:#1a4f91;background:#eef5ff;text-decoration:none}\n.jcms-related-item-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:0.08em;color:#5b6b82;margin-bottom:5px}\n.jcms-related-item-title{font-size:14px;font-weight:700;color:#1a4f91;line-height:1.35}\n\n@media(max-width:640px){\n  .jcms-toc ol{column-count:1}\n  .jcms-compare{grid-template-columns:1fr}\n  .jcms-products{grid-template-columns:1fr}\n  .jcms-cta{padding:28px 22px}\n  .jcms-cta-btn{display:block;margin:6px 0}\n  .jcms-intro-box{padding:24px 20px}\n}\n<\/style>\n\n<article class=\"jcms-wrap\" id=\"tungsten-cmp-slurry-guide\">\n\n\n<div class=\"jcms-meta\">\n  <span class=\"jcms-meta-badge\">CMP Consumables<\/span>\n  <span>\ud83d\udcc5 Updated July 2026<\/span>\n  <span>\ud83d\udd50 25 min read<\/span>\n  <span>By JEEZ Engineering Team<\/span>\n<\/div>\n\n<div class=\"jcms-intro-box\">\n  <p>In modern semiconductor fabrication, <strong>tungsten CMP slurry<\/strong> is the liquid formulation that makes it possible to planarize tungsten-filled contacts, vias, and gate structures with nanometer-level precision. This guide covers everything you need to know\u200a\u2014\u200afrom the electrochemical mechanism that drives material removal to the process metrics that determine device yield, the formulation choices that distinguish Step&nbsp;1 from Step&nbsp;2, and the supplier evaluation criteria that matter in 2026. Whether you are a process engineer qualifying a new slurry or a procurement specialist building a multi-source supply strategy, this is your complete technical and commercial reference.<\/p>\n<\/div>\n\n<nav class=\"jcms-toc\" aria-label=\"\u76ee\u5f55\">\n  <p class=\"jcms-toc-title\">\u76ee\u5f55<\/p>\n  <ol>\n    <li><a href=\"#what-is-tungsten-cmp-slurry\">What Is Tungsten CMP Slurry?<\/a><\/li>\n    <li><a href=\"#why-tungsten\">Why Tungsten in Semiconductor Fabrication?<\/a><\/li>\n    <li><a href=\"#chemistry-mechanism\">The Chemistry Behind Tungsten CMP<\/a><\/li>\n    <li><a href=\"#two-step-process\">The Two-Step Tungsten CMP Process<\/a><\/li>\n    <li><a href=\"#key-components\">Key Components of Tungsten CMP Slurry<\/a><\/li>\n    <li><a href=\"#performance-metrics\">Critical Performance Metrics<\/a><\/li>\n    <li><a href=\"#selectivity\">Highly Selective vs. Low Selective Slurry<\/a><\/li>\n    <li><a href=\"#applications\">Applications: Logic, 3D NAND, and DRAM<\/a><\/li>\n    <li><a href=\"#supplier-evaluation\">How to Evaluate a Tungsten CMP Slurry Supplier<\/a><\/li>\n    <li><a href=\"#market-2026\">Tungsten CMP Slurry Market in 2026<\/a><\/li>\n    <li><a href=\"#jeez-solutions\">JEEZ Tungsten CMP Slurry Solutions<\/a><\/li>\n  <\/ol>\n<\/nav>\n\n<!-- ===== SECTION 1 ===== -->\n<section id=\"what-is-tungsten-cmp-slurry\">\n<h2>1. What Is Tungsten CMP Slurry?<\/h2>\n\n<p>Chemical mechanical planarization (CMP) is the only process in semiconductor manufacturing capable of achieving the global planarity\u200a\u2014\u200aflatness measured in angstroms across a 300&nbsp;mm wafer\u200a\u2014\u200athat advanced multilayer interconnect structures require. CMP combines controlled chemical reactions with mechanical abrasion simultaneously, removing material from the highest topographic features while leaving recessed areas largely untouched. Among all CMP applications, the planarization of tungsten films is one of the most technically demanding and economically significant.<\/p>\n\n<p><strong>Tungsten CMP slurry<\/strong> is the engineered aqueous dispersion that mediates this planarization step. Applied between the rotating polishing pad and the rotating wafer surface, it performs two simultaneous functions: it chemically converts the surface of the metallic tungsten film into a softer, water-soluble oxide compound, and it mechanically abrades and removes that converted layer through the action of suspended submicron particles. The net result is controlled tungsten removal at rates that can exceed 3,000&nbsp;\u00c5\/min\u200a\u2014\u200aroughly equivalent to removing a tungsten film 30&nbsp;nm thick every 60 seconds\u200a\u2014\u200awith a surface finish capable of supporting sub-10&nbsp;nm feature lithography in the subsequent process step.<\/p>\n\n<p>The formulation of a tungsten CMP slurry is a precision exercise in colloidal chemistry. A production slurry contains abrasive particles (most commonly silicon dioxide, SiO<sub>2<\/sub>), an oxidizing agent (most commonly hydrogen peroxide, H<sub>2<\/sub>O<sub>2<\/sub>), a metal ion catalyst (most commonly ferric nitrate, Fe(NO<sub>3<\/sub>)<sub>3<\/sub>), and a suite of stabilizers, complexing agents, and pH modifiers that keep the formulation chemically stable during storage, shipping, and delivery to the point of use at the polishing tool. Each component contributes to the slurry&#8217;s removal rate, its selectivity to dielectric materials below the tungsten film, its defect performance, and its shelf life.<\/p>\n\n<div class=\"jcms-callout jcms-info\">\n  <p class=\"jcms-callout-title\">\ud83d\udca1 Key Principle<\/p>\n  <p>Not all tungsten CMP slurries are interchangeable. The formulation optimized for bulk tungsten removal (Step&nbsp;1) and the formulation used for the barrier\/buff step (Step&nbsp;2) have fundamentally different chemistries, selectivity profiles, and abrasive systems. Using the wrong slurry for a given step is among the most common root causes of dishing, erosion, and defect excursions in production CMP.<\/p>\n<\/div>\n\n<p>The choice of tungsten CMP slurry has direct consequences for device yield, process throughput, and cost of ownership. A slurry that delivers insufficient removal rate forces longer polish times that reduce wafer-per-hour throughput on expensive CMP tools. A slurry with poor selectivity removes excess dielectric and compromises device electrical performance. A slurry with inadequate defect control generates microscratch counts that fail inspection limits and require additional cleaning steps or, in the worst case, cause die-level failures. Selecting the right slurry and the right supplier requires systematic evaluation across all these dimensions.<\/p>\n\n<\/section>\n\n<!-- ===== SECTION 2 ===== -->\n<section id=\"why-tungsten\">\n<h2>2. Why Tungsten in Semiconductor Fabrication?<\/h2>\n\n<p>Tungsten has served as the primary metal for semiconductor contact plugs and vias since the late 1980s, and it remains dominant in this role across the full spectrum of production technology nodes in 2026. Its persistence is not inertia\u200a\u2014\u200ait reflects a combination of physical, chemical, and process properties that no alternative metal has fully replicated in a production context.<\/p>\n\n<h3>Physical and Electrical Properties<\/h3>\n<p>Tungsten&#8217;s most distinctive property is its melting point of 3,422\u2103\u200a\u2014\u200athe highest of any pure metal. This thermal stability ensures that tungsten remains dimensionally and electrically stable through every subsequent thermal process step after deposition, including high-temperature dielectric anneal sequences that would cause other metals to migrate, agglomerate, or interdiffuse. Its bulk resistivity of approximately 5.3&nbsp;\u03bc\u03a9\u00b7cm (for chemical vapor deposited material) is higher than copper or cobalt, but is more than adequate for the short, small-diameter contacts that tungsten fills.<\/p>\n\n<p>The defining process advantage of tungsten is its gap-fill capability. CVD tungsten, deposited from tungsten hexafluoride (WF<sub>6<\/sub>) precursor in a hydrogen-reduction process, nucleates and grows conformally, filling contact and via features with aspect ratios of 8:1, 10:1, or higher without void formation. No other metal offers this combination of conformal deposition, thermal stability, and established integration with the surrounding TiN\/Ti liner stack that serves as the adhesion and barrier layer.<\/p>\n\n<h3>Where Tungsten Appears in Integrated Circuit Structures<\/h3>\n<p>In a leading-edge logic chip, tungsten occupies three structural roles. At the middle of line (MOL), it fills the contact vias that connect the source, drain, and gate terminals of individual transistors to the first metal interconnect layer. At the replacement metal gate (RMG) level, tungsten (or tungsten in combination with a thin work function metal layer) fills the gate electrode trench after the sacrificial polysilicon is removed and the high-k dielectric is deposited. At the first local interconnect level (LI or M0), tungsten sometimes serves as the conductor material before transitioning to copper or cobalt for higher metal levels.<\/p>\n\n<p>In 3D NAND flash memory, tungsten replaces polysilicon as the wordline conductor in the multi-layer gate stack, a transition that has improved device speed and reliability while creating new CMP challenges. In DRAM, tungsten fills the buried wordline trenches and the storage node contacts that form the core of each memory cell.<\/p>\n\n<h3>The Competitive Landscape: Cobalt and Ruthenium<\/h3>\n<p>Cobalt and ruthenium have emerged as candidates to replace tungsten at the most advanced nodes (sub-3&nbsp;nm logic, future DRAM generations) where their lower resistivity in scaled-down geometries offers a performance advantage. Leading foundries have already deployed cobalt at certain metal levels in their most advanced logic products. However, tungsten remains the dominant contact and gate fill metal for the overwhelming majority of wafers in production today, and the CMP consumables ecosystem built around it\u200a\u2014\u200aslurries, pads, cleaners, endpoint sensors\u200a\u2014\u200awill continue to support high-volume production through the end of this decade and into the next.<\/p>\n\n<\/section>\n\n<!-- ===== SECTION 3 ===== -->\n<section id=\"chemistry-mechanism\">\n<h2>3. The Chemistry Behind Tungsten CMP<\/h2>\n\n<p>The tungsten CMP removal mechanism is a cyclical electrochemical-mechanical process that operates continuously across the wafer surface during polishing. Understanding it at the reaction level is essential for interpreting removal rate data, diagnosing process anomalies, and making informed choices about slurry formulation parameters.<\/p>\n\n<h3>Phase 1: Chemical Oxidation of Tungsten<\/h3>\n<p>The chemical half of the process begins when the oxidizing agents in the slurry react with the exposed metallic tungsten film. The primary oxidizer, hydrogen peroxide (H<sub>2<\/sub>O<sub>2<\/sub>), converts tungsten metal at the surface into tungsten trioxide (WO<sub>3<\/sub>). A simplified overall reaction is:<\/p>\n\n<div class=\"jcms-callout jcms-teal\">\n  <p class=\"jcms-callout-title\">\u269b Oxidation Reaction<\/p>\n  <p><strong>W + 3H<sub>2<\/sub>O<sub>2<\/sub> \u2192 WO<sub>3<\/sub> + 3H<sub>2<\/sub>O<\/strong><\/p>\n  <p>Metallic tungsten (hardness ~7.5&nbsp;GPa) is converted to tungsten trioxide, a mechanically soft oxide that is also slightly soluble under acidic conditions. This phase transformation from hard metal to soft oxide is the critical enabling step for mechanical removal.<\/p>\n<\/div>\n\n<p>The rate of WO<sub>3<\/sub> formation depends on H<sub>2<\/sub>O<sub>2<\/sub> concentration, temperature, pH, and the presence of a catalyst. At the concentrations typically used in production slurries (0.3 to 2.0&nbsp;wt%), H<sub>2<\/sub>O<sub>2<\/sub> alone generates WO<sub>3<\/sub> at a rate insufficient for practical throughput. This is where the ferric ion catalyst\u200a\u2014\u200amost commonly delivered as ferric nitrate (Fe(NO<sub>3<\/sub>)<sub>3<\/sub>) at 10 to 100 parts per million\u200a\u2014\u200aplays an essential role.<\/p>\n\n<h3>The Fenton-Type Catalytic Cycle<\/h3>\n<p>Ferric ions (Fe<sup>3+<\/sup>) participate in what is known as a Fenton-type catalytic mechanism. In this cycle, Fe<sup>3+<\/sup> accepts electrons from H<sub>2<\/sub>O<sub>2<\/sub> to form ferrous ions (Fe<sup>2+<\/sup>) and the highly reactive hydroperoxyl radical (HO<sub>2<\/sub>\u00b7). The Fe<sup>2+<\/sup> ions then react with additional H<sub>2<\/sub>O<sub>2<\/sub> to regenerate Fe<sup>3+<\/sup> and produce hydroxyl radicals (\u00b7OH). These hydroxyl radicals are far more powerful oxidizers than H<sub>2<\/sub>O<sub>2<\/sub> alone, dramatically accelerating tungsten surface oxidation. The iron catalyst is regenerated in this cycle rather than consumed, making even small Fe<sup>3+<\/sup> concentrations highly effective.<\/p>\n\n<h3>Phase 2: Mechanical Abrasion and Oxide Removal<\/h3>\n<p>Once the WO<sub>3<\/sub> passivation layer forms on the tungsten surface, the abrasive particles in the slurry\u200a\u2014\u200atypically fumed or colloidal SiO<sub>2<\/sub> at 1 to 10&nbsp;wt%\u200a\u2014\u200amechanically abrade and dislodge this oxide. The removed WO<sub>3<\/sub> dissolves into the slurry&#8217;s aqueous phase and is transported away from the polishing zone by hydrodynamic flow between the pad and the wafer. This mechanical removal step re-exposes fresh metallic tungsten to the slurry chemistry, and the oxidation cycle begins again.<\/p>\n\n<div class=\"jcms-stats\">\n  <div class=\"jcms-stat\">\n    <div class=\"jcms-stat-num\">2-4<\/div>\n    <div class=\"jcms-stat-unit\">pH \u503c\u8303\u56f4<\/div>\n    <div class=\"jcms-stat-label\">Standard acidic operating window for W CMP<\/div>\n  <\/div>\n  <div class=\"jcms-stat\">\n    <div class=\"jcms-stat-num\">0.3\u20132.0<\/div>\n    <div class=\"jcms-stat-unit\">wt% H<sub>2<\/sub>O<sub>2<\/sub><\/div>\n    <div class=\"jcms-stat-label\">Typical oxidizer concentration range<\/div>\n  <\/div>\n  <div class=\"jcms-stat\">\n    <div class=\"jcms-stat-num\">10\u2013100<\/div>\n    <div class=\"jcms-stat-unit\">ppm Fe<sup>3+<\/sup><\/div>\n    <div class=\"jcms-stat-label\">Ferric catalyst loading in production slurries<\/div>\n  <\/div>\n  <div class=\"jcms-stat\">\n    <div class=\"jcms-stat-num\">1\u201310<\/div>\n    <div class=\"jcms-stat-unit\">wt% SiO<sub>2<\/sub><\/div>\n    <div class=\"jcms-stat-label\">Typical abrasive concentration range<\/div>\n  <\/div>\n<\/div>\n\n<h3>The Role of pH<\/h3>\n<p>The acidic pH environment (typically pH&nbsp;2 to 4 for standard formulations) is not arbitrary. It serves three critical functions: it promotes dissolution of the WO<sub>3<\/sub> reaction product, preventing re-deposition as surface residue; it maintains Fe<sup>3+<\/sup> ions in their ionic form (iron precipitates as Fe(OH)<sub>3<\/sub> above approximately pH&nbsp;3.5, which can introduce abrasive-type particles that cause scratches); and it controls the surface charge (zeta potential) of the silica abrasive particles, which governs their colloidal stability and interaction with the wafer surface. Slurry pH must be controlled within \u00b10.2 pH units during manufacturing and monitored continuously through the slurry delivery system at the polishing tool.<\/p>\n\n<a class=\"jcms-deepdive\" href=\"https:\/\/jeez-semicon.com\/zh\/blog\/Tungsten-CMP-Slurry-Chemistry-and-Mechanism-How-Oxidizers-and-Abrasives-Work-Together\/\" target=\"_blank\" rel=\"noopener noreferrer\">\n  <div class=\"jcms-deepdive-icon\">\ud83d\udd2c<\/div>\n  <div class=\"jcms-deepdive-body\">\n    <p class=\"jcms-deepdive-label\">Deep Dive \u2014 Technical Guide<\/p>\n    <p class=\"jcms-deepdive-title\">Tungsten CMP Slurry Chemistry and Mechanism: How Oxidizers and Abrasives Work Together<\/p>\n  <\/div>\n  <span class=\"jcms-deepdive-arrow\">\u2192<\/span>\n<\/a>\n\n<\/section>\n\n<!-- ===== SECTION 4 ===== -->\n<section id=\"two-step-process\">\n<h2>4. The Two-Step Tungsten CMP Process<\/h2>\n\n<p>Production tungsten CMP almost universally employs a two-step or two-platen approach, with each step using a slurry specifically formulated for that step&#8217;s removal objectives. The distinction between steps is not merely a question of polish time\u200a\u2014\u200aeach step uses a different slurry chemistry, a different selectivity profile, and targets a different remaining film stack.<\/p>\n\n<div class=\"jcms-steps\">\n  <div class=\"jcms-step\">\n    <div class=\"jcms-step-num\">1<\/div>\n    <div class=\"jcms-step-body\">\n      <h4>Step 1: Bulk Tungsten Removal (High-Selectivity)<\/h4>\n      <p>Step&nbsp;1 targets the thick tungsten overburden deposited above the feature level during CVD. This blanket tungsten film can be 100 to 300&nbsp;nm thick depending on the contact depth, and it must be removed efficiently and uniformly across the 300&nbsp;mm wafer. Step&nbsp;1 slurries are formulated for high W:Oxide selectivity\u200a\u2014\u200atypically 25:1 to over 100:1\u200a\u2014\u200aso that once the overburden is cleared and the underlying inter-layer dielectric (ILD) is exposed, removal slows to a near-stop without further pad pressure increase. This high selectivity acts as a built-in process-stop, protecting the dielectric from over-polish. Endpoint detection in Step&nbsp;1 uses eddy current sensing on the metallic tungsten film or optical reflectometry as the wafer surface transitions from opaque tungsten to the partially transparent oxide, allowing endpoint to be detected within \u00b13&nbsp;nm of the target removal depth on modern CMP tools.<\/p>\n    <\/div>\n  <\/div>\n  <div class=\"jcms-step\">\n    <div class=\"jcms-step-num\">2<\/div>\n    <div class=\"jcms-step-body\">\n      <h4>Step 2: Buff \/ Barrier Step (Low-Selectivity)<\/h4>\n      <p>The buff step\u200a\u2014\u200asometimes called the barrier step when it also targets the Ti\/TiN adhesion and barrier liner underneath the tungsten\u200a\u2014\u200auses a non-selective or weakly selective slurry (W:Oxide ratio near 1:1). Its objectives are to clear any tungsten residue remaining from Step&nbsp;1, to polish through the thin Ti\/TiN liner layer, to improve global and local wafer planarity by softening the topographic variations left after bulk removal, and to reduce the microscratch count and residue particle density at the wafer surface to levels acceptable for the downstream lithography step. Because the Step&nbsp;2 slurry removes oxide and tungsten at comparable rates, the overpolish duration must be carefully controlled: too long an overpolish in Step&nbsp;2 causes erosion of the dielectric in dense tungsten array areas, while too short a buff leaves Ti\/TiN residues that cause integration failures in subsequent metal deposition steps.<\/p>\n    <\/div>\n  <\/div>\n<\/div>\n\n<div class=\"jcms-callout jcms-note\">\n  <p class=\"jcms-callout-title\">\u26a0 Common Process Pitfall<\/p>\n  <p>Using a high-selectivity Step&nbsp;1 slurry for the buff step\u200a\u2014\u200aor running Step&nbsp;2 overpolish time with a Step&nbsp;1 slurry still on the platen\u200a\u2014\u200ais one of the most frequent root causes of dishing excursions. The step-specific selectivity requirement is non-negotiable in production.<\/p>\n<\/div>\n\n<p>Some advanced process flows employ a single-step CMP approach using a selectivity-transitioning slurry, or use three-platen schemes that separate endpoint detection, bulk removal, and surface finish steps for maximum control. However, the two-step model remains the dominant architecture across logic, NAND, and DRAM production environments as of 2026.<\/p>\n\n<a class=\"jcms-deepdive\" href=\"https:\/\/jeez-semicon.com\/zh\/blog\/Dishing-Erosion-and-Defects-in-Tungsten-CMP-Root-Causes-and-Slurry-Level-Solutions\/\" target=\"_blank\" rel=\"noopener noreferrer\">\n  <div class=\"jcms-deepdive-icon\">\ud83d\udcca<\/div>\n  <div class=\"jcms-deepdive-body\">\n    <p class=\"jcms-deepdive-label\">Related Guide \u2014 Defect Engineering<\/p>\n    <p class=\"jcms-deepdive-title\">Dishing, Erosion, and Defects in Tungsten CMP: Root Causes and Slurry-Level Solutions<\/p>\n  <\/div>\n  <span class=\"jcms-deepdive-arrow\">\u2192<\/span>\n<\/a>\n\n<\/section>\n\n<!-- ===== SECTION 5 ===== -->\n<section id=\"key-components\">\n<h2>5. Key Components of Tungsten CMP Slurry<\/h2>\n\n<p>A production tungsten CMP slurry is not a simple mixture of particles in water. It is a precision-engineered colloidal system in which each ingredient serves a defined function, and the interactions between ingredients determine overall polishing performance, stability, and defect outcome. The following breakdown covers each functional component category in turn.<\/p>\n\n<h3>\u78e8\u6599\u9897\u7c92<\/h3>\n<p>Silicon dioxide (SiO<sub>2<\/sub>) is the dominant abrasive used in tungsten CMP. It is available in two structural forms with meaningfully different performance characteristics.<\/p>\n\n<p><strong>Fumed silica<\/strong> is manufactured by flame hydrolysis of silicon tetrachloride (SiCl<sub>4<\/sub>) at high temperature. The resulting primary particles fuse into branched, chain-like aggregates with a broad particle size distribution (PSD) and irregular morphology. Fumed silica delivers high tungsten MRR due to its high surface area and mechanically aggressive particle shape, but the wide PSD\u200a\u2014\u200aparticularly the tail of oversized agglomerates\u200a\u2014\u200acreates a risk of micro-scratch generation. Fumed silica slurries require robust filtration systems at the point of use to manage the large-particle tail and maintain acceptable defect levels.<\/p>\n\n<p><strong>Colloidal silica<\/strong> is produced through a wet-chemical process (typically based on the St\u00f6ber method or ion-exchange precipitation) that yields nearly spherical particles with a tightly controlled PSD. The narrow, well-characterized particle size results in more predictable polishing kinetics, lower micro-scratch counts, and improved lot-to-lot consistency compared to fumed silica. Colloidal silica formulations are the preferred choice for advanced node applications where post-CMP defect budgets are extremely tight. The trade-off is typically a somewhat lower peak MRR compared to equivalent fumed silica formulations.<\/p>\n\n<p><strong>Alumina (Al<sub>2<\/sub>O<sub>3<\/sub>)<\/strong> abrasive, with a Mohs hardness of 9 compared to silica&#8217;s 7, is used in some Step&nbsp;2 (barrier) formulations where mechanical aggressiveness against the Ti\/TiN liner is needed for acceptable throughput. Alumina-based barrier slurries require careful process parameter optimization to avoid excessive oxide erosion.<\/p>\n\n<h3>Oxidizing Agents<\/h3>\n<p><strong>Hydrogen peroxide (H<sub>2<\/sub>O<sub>2<\/sub>)<\/strong> is the standard oxidizer in commercial tungsten CMP slurries, used at 0.3 to 2.0&nbsp;wt%. It is low cost, readily available in semiconductor-grade purity (29\u200a\u2013\u200a31% concentration from specialty chemical suppliers), and effective across the acidic pH range used for tungsten CMP. Its principal limitation is stability in the presence of metal ions, heat, and UV radiation\u200a\u2014\u200aall of which accelerate H<sub>2<\/sub>O<sub>2<\/sub> decomposition. For this reason, H<sub>2<\/sub>O<sub>2<\/sub>-containing slurries are typically supplied as two-component systems: the abrasive slurry (Component A) and the oxidizer solution (Component B) are shipped and stored separately, then mixed at the point of use at the polishing tool immediately before dispensing. This approach maximizes slurry stability and ensures consistent oxidizer concentration at the wafer surface.<\/p>\n\n<p><strong>Periodic acid (HIO<sub>4<\/sub>)<\/strong> is an alternative oxidizer used in certain specialty formulations, particularly those targeting neutral or near-neutral pH operation. Periodic acid is more stable than H<sub>2<\/sub>O<sub>2<\/sub> in aqueous solution at moderate temperatures, enabling single-component slurry packaging in some formulations. However, its higher cost and the contamination risk from iodine-containing decomposition products limit its adoption to niche or research-scale applications.<\/p>\n\n<h3>Catalyst: Ferric Nitrate<\/h3>\n<p>Fe(NO<sub>3<\/sub>)<sub>3<\/sub> at 10\u200a\u2013\u200a100&nbsp;ppm provides the Fe<sup>3+<\/sup> ions that enable the Fenton-type catalytic cycle described in Section&nbsp;3. The catalyst loading must be optimized for each formulation: insufficient Fe<sup>3+<\/sup> leaves the H<sub>2<\/sub>O<sub>2<\/sub> utilization rate too low for the target MRR; excess Fe<sup>3+<\/sup> destabilizes the slurry through uncontrolled particle flocculation and increases the risk of tungsten surface pitting from over-aggressive oxidation.<\/p>\n\n<h3>Complexing Agents and Stabilizers<\/h3>\n<p>Organic acids\u200a\u2014\u200acitric acid, malonic acid, glycine, and oxalic acid among the most commonly used\u200a\u2014\u200aserve as complexing agents and pH buffers. As complexing agents, they bind dissolved tungsten ions and ferric ions in soluble chelate complexes, preventing their re-precipitation as solid particles at the wafer surface or within the slurry delivery system. As pH buffers, they provide a stable chemical environment even as the polishing reaction produces acidic or basic byproducts. Surfactants may also be added at low concentrations to control abrasive dispersion stability and modify the tribological behavior of the slurry-pad interface.<\/p>\n\n<div class=\"jcms-tbl-wrap\">\n  <table class=\"jcms-tbl\">\n    <thead>\n      <tr>\n        <th>\u7ec4\u4ef6<\/th>\n        <th>Typical Species<\/th>\n        <th>Typical Loading<\/th>\n        <th>\u4e3b\u8981\u529f\u80fd<\/th>\n      <\/tr>\n    <\/thead>\n    <tbody>\n      <tr>\n        <td class=\"jcms-tbl-cat\">\u78e8\u6599<\/td>\n        <td>Fumed SiO<sub>2<\/sub>, Colloidal SiO<sub>2<\/sub>, Al<sub>2<\/sub>O<sub>3<\/sub><\/td>\n        <td>1\u200a\u2013\u200a10 wt%<\/td>\n        <td>Mechanical abrasion and removal of WO<sub>3<\/sub> layer<\/td>\n      <\/tr>\n      <tr>\n        <td class=\"jcms-tbl-cat\">\u6c27\u5316\u5242<\/td>\n        <td>H<sub>2<\/sub>O<sub>2<\/sub>, Periodic acid (HIO<sub>4<\/sub>)<\/td>\n        <td>0.3\u200a\u2013\u200a2.0 wt%<\/td>\n        <td>Chemical oxidation of W to WO<sub>3<\/sub><\/td>\n      <\/tr>\n      <tr>\n        <td class=\"jcms-tbl-cat\">Catalyst<\/td>\n        <td>Fe(NO<sub>3<\/sub>)<sub>3<\/sub> &nbsp;(Fe<sup>3+<\/sup> ions)<\/td>\n        <td>10\u200a\u2013\u200a100 ppm<\/td>\n        <td>Fenton-type acceleration of H<sub>2<\/sub>O<sub>2<\/sub> oxidation kinetics<\/td>\n      <\/tr>\n      <tr>\n        <td class=\"jcms-tbl-cat\">Complexant<\/td>\n        <td>Citric acid, malonic acid, glycine, oxalic acid<\/td>\n        <td>0.01\u200a\u2013\u200a1.0 wt%<\/td>\n        <td>Keep dissolved ions in solution; prevent re-deposition defects<\/td>\n      <\/tr>\n      <tr>\n        <td class=\"jcms-tbl-cat\">pH Agent<\/td>\n        <td>HNO<sub>3<\/sub>, KOH, organic acid buffer blends<\/td>\n        <td>As required<\/td>\n        <td>Maintain target pH (2\u200a\u2013\u200a4 for standard W CMP)<\/td>\n      <\/tr>\n      <tr>\n        <td class=\"jcms-tbl-cat\">Stabilizer<\/td>\n        <td>Non-ionic surfactants, dispersants<\/td>\n        <td>&lt;0.5 wt%<\/td>\n        <td>Colloidal stability; prevent agglomeration during storage and use<\/td>\n      <\/tr>\n    <\/tbody>\n  <\/table>\n<\/div>\n\n<\/section>\n\n<!-- ===== SECTION 6 ===== -->\n<section id=\"performance-metrics\">\n<h2>6. Critical Performance Metrics<\/h2>\n\n<p>Qualifying a tungsten CMP slurry\u200a\u2014\u200awhether for initial introduction or for ongoing supplier management\u200a\u2014\u200arequires evaluating a defined set of performance parameters under controlled test conditions. These metrics form the common language between slurry suppliers and fab process engineers, and they determine whether a formulation is fit for a specific application.<\/p>\n\n<h3>Material Removal Rate (MRR)<\/h3>\n<p>MRR is expressed in \u00c5\/min (angstroms per minute) and measures how fast the slurry removes tungsten from a blanket film wafer under specified polishing conditions: platen rotation speed, wafer carrier (head) rotation speed, downforce (psi or kPa), slurry flow rate (mL\/min), and temperature. A production-viable tungsten MRR for Step&nbsp;1 bulk removal typically falls in the range of 1,500 to 4,000&nbsp;\u00c5\/min, with some high-throughput formulations exceeding this range at elevated downforce. MRR must be measured consistently across multiple wafers in the same run to determine polish rate stability, and across multiple lots of slurry to assess lot-to-lot reproducibility.<\/p>\n\n<h3>Within-Wafer Non-Uniformity (WIWNU)<\/h3>\n<p>A high average MRR is of limited value if removal is non-uniform across the 300&nbsp;mm wafer. WIWNU is typically specified as the standard deviation of the removal rate at multiple measurement sites across the wafer, normalized to the mean, expressed as a percentage (1\u03c3). Production processes require WIWNU below 3\u200a\u2013\u200a5%; leading-edge logic applications targeting contact recess uniformity below 20&nbsp;\u00c5 across the wafer demand WIWNU below 2%.<\/p>\n\n<h3>Selectivity (W:Oxide MRR Ratio)<\/h3>\n<p>Selectivity is the ratio of the tungsten removal rate to the removal rate of the underlying dielectric (typically thermally grown SiO<sub>2<\/sub>, TEOS-deposited SiO<sub>2<\/sub>, or a low-k dielectric). High selectivity (e.g., 50:1) means tungsten is removed 50&nbsp;times faster than oxide, effectively stopping the process at the W\/Oxide interface. Step&nbsp;1 slurries typically operate at selectivities of 25:1 to over 100:1. Step&nbsp;2 buff slurries operate near 1:1 to 3:1. Selectivity is measured using blanket wafers of each material under identical CMP conditions.<\/p>\n\n<h3>\u5782\u9493<\/h3>\n<p>Dishing is the concave depression that forms in the center of tungsten features after CMP. Measured in angstroms using a step height profiler or AFM on patterned test wafers, dishing occurs because the polishing pad can deflect slightly into the recess created by a large-diameter tungsten feature, over-removing tungsten relative to the surrounding oxide. Acceptable dishing tolerances are application-specific: sub-10&nbsp;nm logic node contacts may require dishing below 50&nbsp;\u00c5; less demanding applications may tolerate up to 500&nbsp;\u00c5.<\/p>\n\n<h3>\u4fb5\u8680<\/h3>\n<p>Erosion measures the loss of inter-layer dielectric material in high-density tungsten array test structures, where the collective effect of many tungsten plugs causes the polishing pad to remove more oxide than in low-density or isolated regions. It is measured as the difference in oxide height between isolated and dense array areas on a patterned metrology wafer, expressed in angstroms. Erosion directly reduces the electrical isolation between adjacent interconnect levels.<\/p>\n\n<h3>\u7f3a\u9677<\/h3>\n<p>Post-CMP wafer inspection identifies defects in several categories: micro-scratches (linear surface damage from large abrasive particles or hard agglomerates); residue particles (incompletely rinsed slurry components); corrosion pits (local over-oxidation from hot spots in the slurry chemistry); and staining (ionic or organometallic contamination). Defect counts are measured per cm<sup>2<\/sup> using optical brightfield and darkfield scanning inspection systems. Leading-edge logic and memory applications specify post-clean defect levels in the single digits per cm<sup>2<\/sup> for yield-critical defect types.<\/p>\n\n<a class=\"jcms-deepdive\" href=\"https:\/\/jeez-semicon.com\/zh\/blog\/Dishing-Erosion-and-Defects-in-Tungsten-CMP-Root-Causes-and-Slurry-Level-Solutions\/\" target=\"_blank\" rel=\"noopener noreferrer\">\n  <div class=\"jcms-deepdive-icon\">\ud83d\udd2d<\/div>\n  <div class=\"jcms-deepdive-body\">\n    <p class=\"jcms-deepdive-label\">Technical Deep Dive \u2014 Defect Engineering<\/p>\n    <p class=\"jcms-deepdive-title\">Dishing, Erosion, and Defects in Tungsten CMP: Root Causes and Slurry-Level Solutions<\/p>\n  <\/div>\n  <span class=\"jcms-deepdive-arrow\">\u2192<\/span>\n<\/a>\n\n<\/section>\n\n<!-- ===== SECTION 7 ===== -->\n<section id=\"selectivity\">\n<h2>7. Highly Selective vs. Low Selective Tungsten CMP Slurry<\/h2>\n\n<p>The selectivity of a tungsten CMP slurry\u200a\u2014\u200aits ratio of tungsten material removal rate to oxide dielectric removal rate\u200a\u2014\u200ais the single formulation parameter with the greatest impact on process outcome. Choosing the correct selectivity class for each step is not a matter of preference; it is a technical requirement dictated by the process architecture, the device geometry, and the yield targets of the application.<\/p>\n\n<div class=\"jcms-compare\">\n  <div class=\"jcms-compare-card jcms-cmp-blue\">\n    <span class=\"jcms-compare-badge jcms-badge-blue\">Highly Selective<\/span>\n    <h4>W:Oxide ratio &gt;25:1 (up to &gt;100:1)<\/h4>\n    <ul>\n      <li>Designed for Step 1 bulk tungsten removal<\/li>\n      <li>Protects ILD from dielectric over-loss during overburden clearing<\/li>\n      <li>Provides natural process-stop at W\/Oxide interface<\/li>\n      <li>Higher MRR enables shorter polish times<\/li>\n      <li>Risk: dishing in large or isolated W features due to continued W removal after oxide exposed<\/li>\n      <li>Best suited for dense contact arrays where dishing is geometry-limited<\/li>\n    <\/ul>\n  <\/div>\n  <div class=\"jcms-compare-card jcms-cmp-teal\">\n    <span class=\"jcms-compare-badge jcms-badge-teal\">Low Selective (Non-Selective)<\/span>\n    <h4>W:Oxide ratio 0.5:1 to 3:1<\/h4>\n    <ul>\n      <li>Designed for Step 2 buff \/ barrier removal<\/li>\n      <li>Removes remaining W residue and Ti\/TiN liner uniformly<\/li>\n      <li>Improves global planarization and surface finish<\/li>\n      <li>Reduces or corrects dishing left from Step 1<\/li>\n      <li>Risk: erosion of dielectric in high-density W arrays if overpolish is excessive<\/li>\n      <li>Best suited for surface finish optimization and liner clearing<\/li>\n    <\/ul>\n  <\/div>\n<\/div>\n\n<p>The practical implication is that most production flows run both: a high-selectivity slurry on Platen 1 (Step&nbsp;1) and a non-selective slurry on Platen 2 (Step&nbsp;2). Each is qualified independently, and process engineers optimize the time allocation between steps to balance the competing requirements of dielectric protection (favors Step&nbsp;1 dominated) versus planarity and surface quality (favors adequate Step&nbsp;2 time).<\/p>\n\n<p>Selectivity is also a function of process conditions, not only slurry chemistry. Increasing downforce on a highly selective slurry can reduce effective selectivity by mechanically abrading oxide more aggressively; reducing downforce on a non-selective slurry can improve planarity outcome. This interdependence between slurry chemistry and process parameters is why complete process window characterization\u200a\u2014\u200anot just a single-point datasheet specification\u200a\u2014\u200ais essential for reliable production use.<\/p>\n\n<a class=\"jcms-deepdive\" href=\"https:\/\/jeez-semicon.com\/zh\/blog\/Highly-Selective-vs-Low-Selective-Tungsten-CMP-Slurry-Which-One-Does-Your-Process-Need\/\" target=\"_blank\" rel=\"noopener noreferrer\">\n  <div class=\"jcms-deepdive-icon\">\u2696\ufe0f<\/div>\n  <div class=\"jcms-deepdive-body\">\n    <p class=\"jcms-deepdive-label\">Selection Guide \u2014 Process Engineering<\/p>\n    <p class=\"jcms-deepdive-title\">Highly Selective vs. Low Selective Tungsten CMP Slurry: Which One Does Your Process Need?<\/p>\n  <\/div>\n  <span class=\"jcms-deepdive-arrow\">\u2192<\/span>\n<\/a>\n\n<\/section>\n\n<!-- ===== SECTION 8 ===== -->\n<section id=\"applications\">\n<h2>8. Applications: Logic, 3D NAND, and DRAM<\/h2>\n\n<p>Tungsten CMP serves structurally different functions across logic, NAND flash, and DRAM device families, and each imposes distinct demands on slurry performance. A slurry formulation optimized for logic contact CMP may not be suitable for 3D NAND wordline applications, and vice versa. Understanding device-specific requirements is fundamental to slurry selection and supplier qualification.<\/p>\n\n<h3>Logic Devices: MOL Contact and Replacement Metal Gate<\/h3>\n<p>In high-performance logic chips\u200a\u2014\u200aprocessors, GPUs, application processors, and AI accelerators fabricated at nodes from 28&nbsp;nm down to sub-3&nbsp;nm\u200a\u2014\u200atungsten CMP serves at the middle-of-line (MOL) level and at the replacement metal gate (RMG) step.<\/p>\n\n<p><strong>MOL contact formation<\/strong> fills the contact plugs that connect individual transistor terminals to the first metal interconnect layer (M0 or M1). At sub-7&nbsp;nm nodes, contact diameters are below 15&nbsp;nm with aspect ratios frequently exceeding 10:1. After CVD tungsten fill, the CMP step must clear the overburden with exceptional within-wafer uniformity (WIWNU &lt;2%) and achieve a contact recess (dishing) below 50&nbsp;\u00c5\u200a\u2014\u200atolerances so tight that a 10&nbsp;nm variation in process conditions can be the difference between passing and failing electrical probe results. The dielectric loss budget at these nodes is also severe: losing even 5&nbsp;nm of ILD at the MOL level can affect the capacitance of neighboring structures and change device timing characteristics.<\/p>\n\n<p><strong>Replacement metal gate (RMG)<\/strong> CMP planarizes the tungsten (or tungsten composite) that fills the gate electrode trench after the sacrificial polysilicon gate is replaced. Gate height uniformity across the die\u200a\u2014\u200adirectly controlled by the CMP step\u200a\u2014\u200atranslates into threshold voltage uniformity across all transistors on the chip. A gate height non-uniformity of 1&nbsp;nm can contribute tens of millivolts of V<sub>th<\/sub> variation, which cascades into performance spread and test bin loss.<\/p>\n\n<h3>3D NAND Flash Memory<\/h3>\n<p>The transition to 3D NAND architecture introduced tungsten as the wordline conductor material, replacing the polysilicon wordlines used in planar NAND devices. In a 3D NAND gate stack, alternating layers of oxide and nitride are deposited on the wafer, the nitride is selectively removed, and tungsten is deposited to replace it as the wordline gate electrode. This process, repeated across 200 or more alternating layer pairs in current-generation devices, creates a CMP challenge unlike any other in semiconductor manufacturing.<\/p>\n\n<p>Tungsten wordline CMP in 3D NAND must planarize a surface with dramatically varying pattern density: the array region contains dense, uniformly pitched tungsten wordlines, while the staircase region (where each successive wordline is exposed for contact formation) has a non-uniform step profile that extends across hundreds of micrometers. The slurry must deliver consistent removal across both regions simultaneously, maintaining planarity to within the tolerances needed for the subsequent via lithography step\u200a\u2014\u200awhich must land precisely on each wordline contact landing pad at each of the 200+ layer levels.<\/p>\n\n<p>The cumulative mechanical stress on a 3D NAND gate stack during extended CMP also imposes constraints on slurry formulation and polishing conditions. Stack cracking or delamination from excessive pressure\u200a\u2014\u200aeven momentarily\u200a\u2014\u200acan destroy the entire lot. Slurry formulations for 3D NAND applications are therefore optimized for lower downforce operation with enhanced chemical contribution to ensure adequate MRR without mechanical damage risk.<\/p>\n\n<h3>DRAM: Buried Wordline and Storage Node Contact<\/h3>\n<p>DRAM memory cells use tungsten in two key structures. The <strong>buried wordline (bWL)<\/strong> fills a narrow trench recessed below the active silicon surface; after tungsten deposition, CMP must clear the overburden and recess the tungsten to a precisely controlled depth within \u00b15&nbsp;\u00c5 to ensure correct cell capacitance and avoid shorting to the silicon active area directly above. This is among the tightest depth-of-recess tolerances in production CMP anywhere in the semiconductor industry.<\/p>\n\n<p>The <strong>storage node contact (SNC)<\/strong> fills the via connecting the bitline to the capacitor storage node. SNC CMP requirements are primarily driven by uniformity and surface cleanliness, as metal contamination from the tungsten fill or the slurry chemistry at this level can increase leakage current in the capacitor and degrade data retention time\u200a\u2014\u200athe primary quality metric for DRAM memory cells.<\/p>\n\n<a class=\"jcms-deepdive\" href=\"https:\/\/jeez-semicon.com\/zh\/blog\/Tungsten-CMP-Slurry-for-Advanced-Nodes-Logic-3D-NAND-and-DRAM-Requirements\/\" target=\"_blank\" rel=\"noopener noreferrer\">\n  <div class=\"jcms-deepdive-icon\">\ud83d\udee0\ufe0f<\/div>\n  <div class=\"jcms-deepdive-body\">\n    <p class=\"jcms-deepdive-label\">Application Guide \u2014 Device-Specific Requirements<\/p>\n    <p class=\"jcms-deepdive-title\">Tungsten CMP Slurry for Advanced Nodes: Logic, 3D NAND, and DRAM Requirements<\/p>\n  <\/div>\n  <span class=\"jcms-deepdive-arrow\">\u2192<\/span>\n<\/a>\n\n<div class=\"jcms-tbl-wrap\">\n  <table class=\"jcms-tbl\">\n    <thead>\n      <tr>\n        <th>\u5e94\u7528<\/th>\n        <th>Structure<\/th>\n        <th>Key CMP Requirement<\/th>\n        <th>Slurry Selectivity Focus<\/th>\n      <\/tr>\n    <\/thead>\n    <tbody>\n      <tr>\n        <td class=\"jcms-tbl-cat\">Logic MOL<\/td>\n        <td>Contact vias (&lt;15&nbsp;nm dia.)<\/td>\n        <td>Contact recess &lt;50&nbsp;\u00c5; WIWNU &lt;2%<\/td>\n        <td>High selectivity Step&nbsp;1 + low selectivity buff<\/td>\n      <\/tr>\n      <tr>\n        <td class=\"jcms-tbl-cat\">Logic RMG<\/td>\n        <td>Gate electrode trench fill<\/td>\n        <td>Gate height uniformity (\u00b11&nbsp;nm); low V<sub>th<\/sub> spread<\/td>\n        <td>Moderate selectivity; tight downforce control<\/td>\n      <\/tr>\n      <tr>\n        <td class=\"jcms-tbl-cat\">3D NAND<\/td>\n        <td>Wordline layers (200+)<\/td>\n        <td>Array\/staircase planarity; no stack delamination<\/td>\n        <td>Lower downforce; enhanced chemistry contribution<\/td>\n      <\/tr>\n      <tr>\n        <td class=\"jcms-tbl-cat\">DRAM bWL<\/td>\n        <td>Buried wordline trench<\/td>\n        <td>Recess depth \u00b15&nbsp;\u00c5; no shorts to active<\/td>\n        <td>High selectivity; excellent endpoint resolution<\/td>\n      <\/tr>\n      <tr>\n        <td class=\"jcms-tbl-cat\">DRAM SNC<\/td>\n        <td>Storage node contact<\/td>\n        <td>Surface cleanliness; low metallic contamination<\/td>\n        <td>Non-selective buff; low ionic impurity slurry<\/td>\n      <\/tr>\n    <\/tbody>\n  <\/table>\n<\/div>\n\n<\/section>\n\n<!-- ===== SECTION 9 ===== -->\n<section id=\"supplier-evaluation\">\n<h2>9. How to Evaluate a Tungsten CMP Slurry Supplier<\/h2>\n\n<p>Qualifying a new tungsten CMP slurry supplier is a multi-month investment that spans technical performance assessment, supply chain evaluation, and commercial negotiation in parallel. The framework below reflects the criteria used by process engineering, materials procurement, and supply chain risk management teams at wafer fabs across the industry.<\/p>\n\n<h3>Technical Qualification Criteria<\/h3>\n<p>The technical qualification package from any candidate supplier should include, at minimum:<\/p>\n<ul>\n  <li><strong>Removal rate characterization:<\/strong> Tungsten MRR and oxide MRR data under standard CMP test conditions, with at minimum \u00b13\u03c3 statistical data across a qualification lot<\/li>\n  <li><strong>Selectivity data:<\/strong> W:Oxide ratio at nominal and boundary process conditions (downforce, speed, temperature)<\/li>\n  <li><strong>Dishing and erosion data:<\/strong> Measured on standard patterned test wafers (MIT, SKW, or application-specific pattern sets) at nominal and overpolish time conditions<\/li>\n  <li><strong>Defectivity characterization:<\/strong> Post-CMP and post-clean defect maps and defect count summaries by category, from optical brightfield and darkfield inspection systems<\/li>\n  <li><strong>Particle size distribution:<\/strong> Mean particle size, PSD width, and large-particle (tail) characterization by dynamic light scattering or laser diffraction<\/li>\n  <li><strong>Slurry stability data:<\/strong> MRR and defect performance as a function of storage time and temperature<\/li>\n  <li><strong>Metallic purity:<\/strong> ICP-MS data for key metallic impurities (Fe, Na, K, Ca, Cr, Ni, Cu, Zn) at or below low-ppb levels<\/li>\n<\/ul>\n\n<h3>Supply Chain and Operational Evaluation<\/h3>\n<p>Technical performance is a necessary but not sufficient condition for supplier qualification. Operational factors have equal importance in production environments where CMP slurry supply disruption can halt wafer production within hours:<\/p>\n<ul>\n  <li><strong>Geographic proximity and logistics capability:<\/strong> Shorter supply chains reduce lead times and reduce the risk of temperature excursion during transport for H<sub>2<\/sub>O<sub>2<\/sub>-containing formulations<\/li>\n  <li><strong>Minimum order quantity (MOQ) and delivery frequency:<\/strong> Especially important for smaller fabs or during technology ramp-up phases<\/li>\n  <li><strong>Batch-to-batch consistency certification:<\/strong> Certificate of Analysis (CoA) with every delivery, with specified acceptance criteria<\/li>\n  <li><strong>Safety data, regulatory compliance:<\/strong> SDS documentation, REACH\/RoHS compliance, UN transport classification<\/li>\n  <li><strong>Application engineering support:<\/strong> Availability of process engineers who can assist with slurry integration, endpoint setup, and process excursion root-cause analysis<\/li>\n<\/ul>\n\n<h3>The Strategic Case for Supplier Diversification<\/h3>\n<p>The consolidation of the CMP consumables industry in recent years\u200a\u2014\u200amost notably the merger of major players that concentrated significant market share with fewer Tier&nbsp;1 vendors\u200a\u2014\u200ahas increased supply concentration risk for fabs that rely on a single supplier. As of 2026, a growing number of logic and memory fabs operate formal multi-vendor qualification policies for CMP slurries, maintaining two or more qualified sources for each application. This approach requires additional qualification investment upfront but provides supply assurance, pricing leverage, and the option to shift volume rapidly in response to supply disruptions or quality events.<\/p>\n\n<a class=\"jcms-deepdive\" href=\"https:\/\/jeez-semicon.com\/zh\/blog\/Tungsten-CMP-Slurry-Suppliers-Compared-Entegris-DuPont-Merck-EMD-and-When-to-Consider-Alternatives\/\" target=\"_blank\" rel=\"noopener noreferrer\">\n  <div class=\"jcms-deepdive-icon\">\u2696\ufe0f<\/div>\n  <div class=\"jcms-deepdive-body\">\n    <p class=\"jcms-deepdive-label\">Supplier Guide \u2014 Procurement Intelligence<\/p>\n    <p class=\"jcms-deepdive-title\">Tungsten CMP Slurry Suppliers Compared: Entegris, DuPont, Merck EMD, and When to Consider Alternatives<\/p>\n  <\/div>\n  <span class=\"jcms-deepdive-arrow\">\u2192<\/span>\n<\/a>\n\n<\/section>\n\n<!-- ===== SECTION 10 ===== -->\n<section id=\"market-2026\">\n<h2>10. Tungsten CMP Slurry Market in 2026<\/h2>\n\n<p>The global tungsten CMP slurry market is a segment of the broader CMP slurry market, which itself is part of the semiconductor process chemicals and consumables industry. In mid-2026, the tungsten CMP slurry market is valued at approximately USD&nbsp;400\u200a\u2013\u200a550&nbsp;million annually, with compound annual growth rates projected at 4\u200a\u2013\u200a6% through the end of the decade based on estimates from multiple industry research firms. This growth is driven by several structural demand factors.<\/p>\n\n<h3>AI and High-Performance Computing Demand<\/h3>\n<p>The rapid expansion of AI training and inference infrastructure has driven record wafer starts at leading logic foundries. AI accelerators and HPC chips are architecturally contact-intensive: a leading-edge GPU or AI chip may contain billions of individual tungsten contact plugs per die, each requiring a CMP step in its fabrication. Higher wafer volumes at logic fabs translate directly to higher tungsten CMP slurry consumption.<\/p>\n\n<h3>3D NAND Layer Count Scaling<\/h3>\n<p>As memory manufacturers continue scaling 3D NAND from 200 to 300 and beyond, the tungsten content per memory wafer increases proportionally and CMP polish times extend. Both effects increase per-wafer slurry consumption. The shift toward more complex 3D NAND architectures (dual-deck stacks, string stacking) further expands the number of CMP steps per wafer in memory manufacturing.<\/p>\n\n<h3>Automotive and Industrial Semiconductor Growth<\/h3>\n<p>Electrification of vehicles, expansion of advanced driver assistance systems (ADAS), and industrial automation are sustaining strong demand for mature-node power, analog, and microcontroller chips manufactured at 28&nbsp;nm, 40&nbsp;nm, and 65&nbsp;nm nodes. These nodes use tungsten CMP intensively and do not transition to alternative metal systems, providing a stable demand base that runs parallel to leading-edge node growth.<\/p>\n\n<h3>Asia-Pacific Capacity Expansion<\/h3>\n<p>New fab construction across China, South Korea, Japan, and Taiwan represents the largest source of incremental CMP slurry demand globally. Asia-Pacific fabs are also the primary growth market for qualified alternative and regional suppliers, who can offer logistics advantages, faster technical support response, and competitive pricing compared to established Western-headquartered Tier&nbsp;1 suppliers whose primary operations are geographically distant.<\/p>\n\n<a class=\"jcms-deepdive\" href=\"https:\/\/jeez-semicon.com\/zh\/blog\/Tungsten-CMP-Slurry-Market-2026-Size-Growth-Drivers-and-Global-Outlook\/\" target=\"_blank\" rel=\"noopener noreferrer\">\n  <div class=\"jcms-deepdive-icon\">\ud83d\udcc8<\/div>\n  <div class=\"jcms-deepdive-body\">\n    <p class=\"jcms-deepdive-label\">Market Analysis \u2014 Industry Intelligence<\/p>\n    <p class=\"jcms-deepdive-title\">Tungsten CMP Slurry Market 2026: Size, Growth Drivers, and Global Outlook<\/p>\n  <\/div>\n  <span class=\"jcms-deepdive-arrow\">\u2192<\/span>\n<\/a>\n\n<\/section>\n\n<!-- ===== SECTION 11 ===== -->\n<section id=\"jeez-solutions\">\n<h2>11. JEEZ Tungsten CMP Slurry Solutions<\/h2>\n\n<p>Jizhi Electronic Technology Co., Ltd.\u200a\u2014\u200aoperating under the <strong>JEEZ<\/strong> brand (jeez-semicon.com)\u200a\u2014\u200ais a manufacturer of semiconductor consumables serving customers in logic, memory, and power device manufacturing worldwide. JEEZ&#8217;s product portfolio encompasses CMP polishing slurries, CMP polishing pads, dicing blades, and absorption and backing films, providing fab customers with a coordinated source for the consumables most critical to their CMP and dicing process steps.<\/p>\n\n<p>JEEZ tungsten CMP slurries are formulated and characterized to address both steps of the standard two-step process architecture. The product offering includes two series:<\/p>\n\n<div class=\"jcms-products\">\n  <div class=\"jcms-product-card hs\">\n    <span class=\"jcms-product-tag jcms-tag-hs\">Step 1 \u2014 High Selectivity<\/span>\n    <h4>JEEZ W-CMP-HS Series<\/h4>\n    <ul>\n      <li>W MRR &gt;2,000&nbsp;\u00c5\/min at standard conditions<\/li>\n      <li>W:Oxide selectivity &gt;50:1<\/li>\n      <li>Colloidal SiO<sub>2<\/sub> abrasive for controlled defect performance<\/li>\n      <li>Two-component system (Point-of-Use oxidizer mixing)<\/li>\n      <li>Qualified ICP-MS metallic impurity data available<\/li>\n      <li>Suitable for logic contacts, RMG, and mature-node BEOL<\/li>\n    <\/ul>\n  <\/div>\n  <div class=\"jcms-product-card ls\">\n    <span class=\"jcms-product-tag jcms-tag-ls\">Step 2 \u2014 Low Selectivity \/ Buff<\/span>\n    <h4>JEEZ W-CMP-LS Series<\/h4>\n    <ul>\n      <li>Near-unity W:Oxide selectivity (1:1 to 3:1)<\/li>\n      <li>Engineered for Ti\/TiN liner clearing and surface finish<\/li>\n      <li>Low large-particle tail for sub-65&nbsp;nm defect targets<\/li>\n      <li>Compatible with standard barrier CMP process windows<\/li>\n      <li>Application engineering support for process integration<\/li>\n      <li>Suitable for logic buff, 3D NAND wordline, DRAM SNC applications<\/li>\n    <\/ul>\n  <\/div>\n<\/div>\n\n<p>Both series are available in sample quantities for process qualification, with full documentation packages including Safety Data Sheets (SDS), Certificates of Analysis (CoA), particle size distribution reports, and metallic impurity characterization by ICP-MS. JEEZ&#8217;s application engineering team provides technical consultation throughout the qualification process\u200a\u2014\u200afrom initial screening and test wafer design to process window optimization and production readiness review.<\/p>\n\n<div class=\"jcms-callout jcms-teal\">\n  <p class=\"jcms-callout-title\">\u2699\ufe0f Why Fabs Choose JEEZ<\/p>\n  <p>As an Asia-Pacific-based manufacturer, JEEZ offers competitive lead times, responsive technical support across GMT+8 time zones, and flexible minimum order quantities that make it practical to qualify JEEZ as a dual-source supplier alongside existing Tier&nbsp;1 vendors\u200a\u2014\u200awithout requiring a large upfront commitment before qualification is complete.<\/p>\n<\/div>\n\n<\/section>\n\n<hr class=\"jcms-sep\">\n\n<!-- ===== CONCLUSION ===== -->\n<div class=\"jcms-conclusion\">\n  <h3>Summary: Choosing the Right Tungsten CMP Slurry<\/h3>\n  <p>Tungsten CMP slurry selection sits at the intersection of materials chemistry, process engineering, and supply chain strategy. The formulation that delivers optimal bulk removal rate for a logic contact application may be entirely wrong for 3D NAND staircase CMP. The supplier that meets your current production volume may or may not be able to scale supply reliably as your wafer output grows. And the single-source supply strategy that seemed efficient when raw material availability was stable may represent an unacceptable risk in the supply environment of 2026.<\/p>\n  <p>This guide has introduced the foundational chemistry and two-step process architecture of tungsten CMP, explained the functional role of each slurry component, defined the performance metrics by which slurries are evaluated and compared, and described the device-specific requirements that differentiate logic, NAND, and DRAM applications. It has also covered the supplier evaluation framework and market context that inform procurement decisions.<\/p>\n  <p>Use the deep-dive guides linked throughout this page to go further on any specific topic, and reach out to the JEEZ team to discuss how our tungsten CMP slurry solutions can be integrated into your qualification program.<\/p>\n<\/div>\n\n<!-- ===== CTA ===== -->\n<div class=\"jcms-cta\">\n  <h3>Ready to Qualify a Tungsten CMP Slurry?<\/h3>\n  <p>JEEZ provides sample quantities, full technical data packages, and application engineering support for process qualification at logic, memory, and power device manufacturing facilities worldwide. Contact us to discuss your application requirements.<\/p>\n  <a class=\"jcms-cta-btn\" href=\"https:\/\/jeez-semicon.com\/zh\/contact\/\" target=\"_blank\" rel=\"noopener noreferrer\">Request a Sample &amp; Consultation<\/a>\n<\/div>\n\n<!-- ===== RELATED ARTICLES ===== -->\n<div class=\"jcms-related\">\n  <p class=\"jcms-related-title\">\ud83d\udd17 Related Technical Guides in This Series<\/p>\n  <div class=\"jcms-related-grid\">\n    <a class=\"jcms-related-item\" href=\"https:\/\/jeez-semicon.com\/zh\/blog\/Tungsten-CMP-Slurry-Chemistry-and-Mechanism-How-Oxidizers-and-Abrasives-Work-Together\/\" target=\"_blank\" rel=\"noopener noreferrer\">\n      <p class=\"jcms-related-item-label\">Chemistry &amp; Mechanism<\/p>\n      <p class=\"jcms-related-item-title\">Tungsten CMP Slurry Chemistry and Mechanism: How Oxidizers and Abrasives Work Together<\/p>\n    <\/a>\n    <a class=\"jcms-related-item\" href=\"https:\/\/jeez-semicon.com\/zh\/blog\/Dishing-Erosion-and-Defects-in-Tungsten-CMP-Root-Causes-and-Slurry-Level-Solutions\/\" target=\"_blank\" rel=\"noopener noreferrer\">\n      <p class=\"jcms-related-item-label\">Defect Engineering<\/p>\n      <p class=\"jcms-related-item-title\">Dishing, Erosion, and Defects in Tungsten CMP: Root Causes and Slurry-Level Solutions<\/p>\n    <\/a>\n    <a class=\"jcms-related-item\" href=\"https:\/\/jeez-semicon.com\/zh\/blog\/Highly-Selective-vs-Low-Selective-Tungsten-CMP-Slurry-Which-One-Does-Your-Process-Need\/\" target=\"_blank\" rel=\"noopener noreferrer\">\n      <p class=\"jcms-related-item-label\">\u9009\u62e9\u6307\u5357<\/p>\n      <p class=\"jcms-related-item-title\">Highly Selective vs. Low Selective Tungsten CMP Slurry: Which One Does Your Process Need?<\/p>\n    <\/a>\n    <a class=\"jcms-related-item\" href=\"https:\/\/jeez-semicon.com\/zh\/blog\/Tungsten-CMP-Slurry-for-Advanced-Nodes-Logic-3D-NAND-and-DRAM-Requirements\/\" target=\"_blank\" rel=\"noopener noreferrer\">\n      <p class=\"jcms-related-item-label\">Application Guide<\/p>\n      <p class=\"jcms-related-item-title\">Tungsten CMP Slurry for Advanced Nodes: Logic, 3D NAND, and DRAM Requirements<\/p>\n    <\/a>\n    <a class=\"jcms-related-item\" href=\"https:\/\/jeez-semicon.com\/zh\/blog\/Tungsten-CMP-Slurry-Suppliers-Compared-Entegris-DuPont-Merck-EMD-and-When-to-Consider-Alternatives\/\" target=\"_blank\" rel=\"noopener noreferrer\">\n      <p class=\"jcms-related-item-label\">Supplier Comparison<\/p>\n      <p class=\"jcms-related-item-title\">Tungsten CMP Slurry Suppliers Compared: Entegris, DuPont, Merck EMD, and When to Consider Alternatives<\/p>\n    <\/a>\n    <a class=\"jcms-related-item\" href=\"https:\/\/jeez-semicon.com\/zh\/blog\/Tungsten-CMP-Slurry-Market-2026-Size-Growth-Drivers-and-Global-Outlook\/\" target=\"_blank\" rel=\"noopener noreferrer\">\n      <p class=\"jcms-related-item-label\">Market Intelligence<\/p>\n      <p class=\"jcms-related-item-title\">Tungsten CMP Slurry Market 2026: Size, Growth Drivers, and Global Outlook<\/p>\n    <\/a>\n  <\/div>\n<\/div>\n\n<\/article>","protected":false},"excerpt":{"rendered":"<p>CMP Consumables \ud83d\udcc5 Updated July 2026 \ud83d\udd50 25 min read By JEEZ Engineering Team In modern semiconductor fabrication, tungsten CMP slurry is the liquid formulation that makes it possible to  &#8230;<\/p>","protected":false},"author":1,"featured_media":2523,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[9,59],"tags":[],"class_list":["post-2502","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-industry"],"acf":[],"_links":{"self":[{"href":"https:\/\/jeez-semicon.com\/zh\/wp-json\/wp\/v2\/posts\/2502","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jeez-semicon.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jeez-semicon.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jeez-semicon.com\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jeez-semicon.com\/zh\/wp-json\/wp\/v2\/comments?post=2502"}],"version-history":[{"count":2,"href":"https:\/\/jeez-semicon.com\/zh\/wp-json\/wp\/v2\/posts\/2502\/revisions"}],"predecessor-version":[{"id":2504,"href":"https:\/\/jeez-semicon.com\/zh\/wp-json\/wp\/v2\/posts\/2502\/revisions\/2504"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jeez-semicon.com\/zh\/wp-json\/wp\/v2\/media\/2523"}],"wp:attachment":[{"href":"https:\/\/jeez-semicon.com\/zh\/wp-json\/wp\/v2\/media?parent=2502"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jeez-semicon.com\/zh\/wp-json\/wp\/v2\/categories?post=2502"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jeez-semicon.com\/zh\/wp-json\/wp\/v2\/tags?post=2502"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}