{"id":1483,"date":"2026-03-04T10:23:13","date_gmt":"2026-03-04T02:23:13","guid":{"rendered":"https:\/\/jeez-semicon.com\/?p=1483"},"modified":"2026-03-04T11:25:54","modified_gmt":"2026-03-04T03:25:54","slug":"cmp-slurry-for-advanced-nodes-5nm-3nm-2nm-beyond-technical-challenges-innovations","status":"publish","type":"post","link":"https:\/\/jeez-semicon.com\/ja\/blog\/cmp-slurry-for-advanced-nodes-5nm-3nm-2nm-beyond-technical-challenges-innovations\/","title":{"rendered":"\u5148\u7aef\u30ce\u30fc\u30c9\u5411\u3051CMP\u30b9\u30e9\u30ea\u30fc\uff1a5nm\u30013nm\u30012nm\u3001\u305d\u3057\u3066\u305d\u306e\u5148\u3078 - \u6280\u8853\u7684\u8ab2\u984c\u3068\u30a4\u30ce\u30d9\u30fc\u30b7\u30e7\u30f3"},"content":{"rendered":"<!--\n========================================================\n  CLUSTER ARTICLE 5 \u2014 CMP SLURRY FOR ADVANCED NODES\n  SEO Keyword: CMP slurry advanced nodes\n  Slug: \/cmp-slurry-advanced-nodes\/\n  Pillar: \/cmp-slurry-complete-guide\/\n  ~3,000 words\n========================================================\n-->\n<!-- SEO META\n     Title    : CMP Slurry for Advanced Nodes: 3nm, 2nm & Beyond (2025 Guide)\n     Meta desc: How CMP slurry must evolve for 5nm\/3nm\/2nm \u2014 ULK dielectric,\n                GAA, cobalt, ruthenium, 3D NAND, advanced packaging, abrasive-free.\n     Focus KW : CMP slurry advanced nodes\n-->\n\n<style>\n.cmp-article *,.cmp-article *::before,.cmp-article *::after{box-sizing:border-box}\n.cmp-article{font-family:'Georgia','Times New Roman',serif;font-size:17px;line-height:1.85;color:#1a1a2e;max-width:860px;margin:0 auto;padding:0 20px 60px}\n.cmp-article h1{font-family:'Segoe UI','Helvetica Neue',Arial,sans-serif;font-size:clamp(26px,4vw,42px);font-weight:800;line-height:1.2;color:#0a0a23;margin:0 0 16px;letter-spacing:-.5px}\n.cmp-article h2{font-family:'Segoe UI','Helvetica Neue',Arial,sans-serif;font-size:clamp(19px,2.5vw,26px);font-weight:700;color:#0a2463;margin:52px 0 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span{font-size:13px;color:#64748b}\n.cmp-cta{background:linear-gradient(135deg,#d4380d,#f5692e);border-radius:12px;padding:36px 40px;text-align:center;margin:48px 0;color:#fff}\n.cmp-cta h3{font-family:'Segoe UI',Arial,sans-serif;font-size:22px;font-weight:800;color:#fff!important;margin:0 0 10px!important}\n.cmp-cta p{color:rgba(255,255,255,.9);margin:0 0 20px;font-family:'Segoe UI',Arial,sans-serif}\n.cmp-cta a{display:inline-block;background:#fff;color:#d4380d!important;font-family:'Segoe UI',Arial,sans-serif;font-weight:800;font-size:15px;padding:13px 32px;border-radius:50px;text-decoration:none!important;letter-spacing:.3px;transition:transform .2s,box-shadow .2s}\n.cmp-cta a:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(0,0,0,.2)}\n.cmp-faq{margin:24px 0}\n.faq-item{border:1px solid #e2e8f0;border-radius:8px;margin-bottom:14px;overflow:hidden}\n.faq-question{background:#f8faff;padding:18px 22px;font-family:'Segoe UI',Arial,sans-serif;font-weight:700;color:#0a2463;font-size:15.5px;margin:0}\n.faq-answer{padding:18px 22px;background:#fff;font-size:15.5px;color:#2d2d2d;border-top:1px solid #e2e8f0}\n.back-to-pillar{display:flex;align-items:center;gap:12px;background:#f0f4ff;border:1px solid #c7d5f5;border-radius:10px;padding:18px 24px;margin:48px 0 0;text-decoration:none!important;transition:background .2s}\n.back-to-pillar:hover{background:#e0e8ff}\n.back-to-pillar .btp-icon{font-size:24px;flex-shrink:0}\n.back-to-pillar .btp-text{font-family:'Segoe UI',Arial,sans-serif}\n.back-to-pillar .btp-label{font-size:12px;color:#64748b;display:block}\n.back-to-pillar .btp-title{font-size:15px;font-weight:700;color:#0a2463}\n@media(max-width:600px){.cmp-hero{padding:32px 22px}.cmp-cta{padding:28px 20px}.cmp-toc{padding:22px 18px}.node-timeline{flex-wrap:wrap}.node-step{flex:0 0 33%}.vs-grid{grid-template-columns:1fr}.challenge-card{padding:20px 18px}}\n<\/style>\n\n<article class=\"cmp-article\" itemscope itemtype=\"https:\/\/schema.org\/Article\">\n\n\n<div class=\"cmp-hero\">\n  <p class=\"hero-intro\">As semiconductor technology crosses into the angstrom era, CMP slurry formulation science faces its most demanding challenges yet. Mechanically fragile ultra-low-k dielectrics, new metal conductors with no CMP precedent, three-dimensional transistor architectures, and defect budgets measured in single digits per wafer &#8212; this guide examines each challenge in technical depth and maps the formulation innovations driving solutions.<\/p>\n<\/div>\n\n<div class=\"cmp-trust\">\n  <div class=\"trust-avatar\">&#9883;&#65039;<\/div>\n  <div class=\"trust-text\">\n    <strong>Jizhi Electronic Technology Co., Ltd. &#8212; Process Engineering Team<\/strong>\n    <span>\u6c5f\u8607\u7701\u7121\u932b\u5e02\u306eCMP\u30b9\u30e9\u30ea\u30fc\u5c02\u9580\u30e1\u30fc\u30ab\u30fc\u3002\u306e\u4e00\u90e8\u3002 <a href=\"https:\/\/jeez-semicon.com\/ja\/blog\/what-is-cmp-slurry-a-complete-guide-to-chemical-mechanical-planarization-slurry\/\">CMP\u30b9\u30e9\u30ea\u30fc\u30ac\u30a4\u30c9<\/a> \u306e\u30b7\u30ea\u30fc\u30ba\u3092\u53c2\u7167\u3055\u308c\u305f\u3044\u3002.<\/span>\n  <\/div>\n<\/div>\n\n<div class=\"node-timeline\">\n  <div class=\"node-step n28\"><span class=\"ns-node\">28nm<\/span><span class=\"ns-year\">~2011<\/span><span class=\"ns-cmp\">~12 steps<\/span><\/div>\n  <div class=\"node-step n7\"><span class=\"ns-node\">7nm<\/span><span class=\"ns-year\">~2018<\/span><span class=\"ns-cmp\">~18 steps<\/span><\/div>\n  <div class=\"node-step n5\"><span class=\"ns-node\">5nm<\/span><span class=\"ns-year\">~2020<\/span><span class=\"ns-cmp\">~22 steps<\/span><\/div>\n  <div class=\"node-step n3\"><span class=\"ns-node\">3nm<\/span><span class=\"ns-year\">~2022<\/span><span class=\"ns-cmp\">~25 steps<\/span><\/div>\n  <div class=\"node-step n2\"><span class=\"ns-node\">2nm<\/span><span class=\"ns-year\">~2025<\/span><span class=\"ns-cmp\">&gt;28 steps<\/span><\/div>\n  <div class=\"node-step n1\"><span class=\"ns-node\">A14<\/span><span class=\"ns-year\">2027+<\/span><span class=\"ns-cmp\">30+ steps<\/span><\/div>\n<\/div>\n\n<div class=\"cmp-toc\">\n  <h2>\u76ee\u6b21<\/h2>\n  <ol>\n    <li><a href=\"#why-harder\">Why Advanced Nodes Make CMP Progressively More Demanding<\/a><\/li>\n    <li><a href=\"#ulk\">Challenge 1: Ultra-Low-k (ULK) Dielectric CMP<\/a><\/li>\n    <li><a href=\"#gaa\">Challenge 2: Gate-All-Around (GAA) Transistor CMP<\/a><\/li>\n    <li><a href=\"#cobalt\">Challenge 3: Cobalt CMP &#8212; The MOL Contact Revolution<\/a><\/li>\n    <li><a href=\"#ruthenium\">Challenge 4: Ruthenium CMP &#8212; The Next Frontier<\/a><\/li>\n    <li><a href=\"#nand\">Challenge 5: 3D NAND High-Aspect-Ratio CMP<\/a><\/li>\n    <li><a href=\"#packaging\">Challenge 6: Advanced Packaging CMP<\/a><\/li>\n    <li><a href=\"#afs\">Challenge 7: Abrasive-Free Slurry (AFS) for Defect-Zero Applications<\/a><\/li>\n    <li><a href=\"#node-comparison\">Node-by-Node CMP Requirements Summary<\/a><\/li>\n    <li><a href=\"#faq\">\u3088\u304f\u3042\u308b\u8cea\u554f<\/a><\/li>\n  <\/ol>\n<\/div>\n\n<h2 id=\"why-harder\">1. Why Advanced Nodes Make CMP Progressively More Demanding<\/h2>\n\n<p>The relationship between semiconductor node scaling and CMP complexity is not linear &#8212; it is compounding. Each generation tightens requirements across every dimension simultaneously: stricter planarity budgets, narrower defectivity windows, higher selectivity demands, tighter WIWNU targets, and new target materials requiring fresh formulation approaches with no prior qualification history.<\/p>\n\n<p>Three structural trends drive this compounding difficulty. <strong>Feature size reduction:<\/strong> a 10 nm height variation tolerable at 28nm can cause catastrophic EUV exposure failures at 3nm, where depth-of-focus may be only 30&#8211;50 nm &#8212; planarity budgets shrink faster than the node number itself. <strong>Increasing CMP step count:<\/strong> from ~12 steps at 28nm to over 28 at TSMC N2, total complexity grows linearly while each step&#39;s tolerance budget shrinks. <strong>New material introductions:<\/strong> cobalt contacts, ruthenium liners, ELK SiCOH &#8212; each may require a purpose-designed slurry with no existing commercial baseline.<\/p>\n\n<div class=\"cmp-box blue\">\n  <p class=\"box-title\">&#128204; The Tolerance Budget Problem<\/p>\n  <p style=\"margin:0;\">At 28nm, a CMP step might allow &#177;15 nm remaining-film variation. At 3nm, the equivalent step may allow &#177;2 nm &#8212; an 87% reduction in tolerance for a process running 10&#215; more wafers per day. Achieving &#177;2 nm requires better slurry formulation, tighter WIWNU control, more precise endpoint detection, and tighter control of every variable from slurry temperature to pad conditioning frequency.<\/p>\n<\/div>\n\n<h2 id=\"ulk\">2. Challenge 1: Ultra-Low-k (ULK) Dielectric CMP<\/h2>\n\n<div class=\"challenge-card ulk\">\n  <div class=\"ch-header\">\n    <div class=\"ch-icon\">&#128309;<\/div>\n    <div>\n      <p class=\"ch-title\">Ultra-Low-k (ULK) Dielectric CMP<\/p>\n      <p class=\"ch-subtitle\">The mechanical fragility problem that redefined BEOL CMP formulation<\/p>\n    <\/div>\n  <\/div>\n  <div class=\"ch-specs\">\n    <span class=\"ch-pill\">k &lt; 2.5 (ULK)<\/span>\n    <span class=\"ch-pill\">k &lt; 2.0 (ELK)<\/span>\n    <span class=\"ch-pill\">Porosity: 20&#8211;40%<\/span>\n    <span class=\"ch-pill orange\">Mechanical fragility: Very high<\/span>\n    <span class=\"ch-pill red\">Delamination risk: High<\/span>\n  <\/div>\n  <p>The transition from dense SiO&#8322; ILD (k &#8776; 4.0) to porous ultra-low-k dielectrics (k &lt; 2.5) was one of the most disruptive material changes in BEOL interconnect history. Introducing porosity &#8212; air-gaps distributed through a SiCOH matrix &#8212; reduces mechanical stiffness and fracture toughness by 60&#8211;80% relative to dense SiO&#8322;.<\/p>\n  <p>Standard abrasive contact generates local stress concentrations exceeding the fracture strength of porous ULK films, producing sub-surface cracking, delamination at the ULK\/etch-stop interface, and macro-scale spallation in severe cases. Increasing abrasive concentration or downforce to improve MRR is strictly counter-productive &#8212; it linearly increases mechanical film damage probability.<\/p>\n  <h3>Advanced Slurry Solutions for ULK CMP<\/h3>\n  <p>ULK-compatible formulations shift the removal mechanism decisively toward the chemical side: <strong>reduced abrasive concentration<\/strong> (2&#8211;5 wt% vs. 8&#8211;12 wt% standard); <strong>smaller, spherical particles<\/strong> with D50 30&#8211;60 nm and D99 &lt;120 nm (any particle above 200 nm is catastrophic); <strong>pH-optimized alkaline conditions<\/strong> (pH 9.5&#8211;10.5) maximizing Si&#8211;O&#8211;Si hydrolytic dissolution; and <strong>non-ionic surfactant stress-shielding<\/strong> to distribute abrasive contact stress across fragile pore walls.<\/p>\n  <div class=\"cmp-box amber\">\n    <p class=\"box-title\">&#9888;&#65039; ELK &#8212; The Next Frontier<\/p>\n    <p style=\"margin:0;\">At 2nm and beyond, extreme low-k (ELK) dielectrics with k approaching 2.0 require porosity of 30&#8211;40%, approaching the mechanical limits of abrasive-based CMP processability. ELK CMP will likely require abrasive-free slurry or a fundamentally new planarization approach for the most fragile BEOL layers.<\/p>\n  <\/div>\n<\/div>\n\n<h2 id=\"gaa\">3. Challenge 2: Gate-All-Around (GAA) Transistor CMP<\/h2>\n\n<div class=\"challenge-card gaa\">\n  <div class=\"ch-header\">\n    <div class=\"ch-icon\">&#128995;<\/div>\n    <div>\n      <p class=\"ch-title\">Gate-All-Around (GAA) \/ Nanosheet CMP<\/p>\n      <p class=\"ch-subtitle\">New transistor geometry creates FEOL CMP steps with no historical precedent<\/p>\n    <\/div>\n  <\/div>\n  <div class=\"ch-specs\">\n    <span class=\"ch-pill\">First production: TSMC N2, Samsung SF3<\/span>\n    <span class=\"ch-pill\">Nanosheet width: 5&#8211;20 nm<\/span>\n    <span class=\"ch-pill orange\">New CMP steps: 3&#8211;5 added vs. FinFET<\/span>\n    <span class=\"ch-pill red\">No legacy formulation baseline<\/span>\n  <\/div>\n  <p>Gate-all-around transistors &#8212; commercialized by Samsung at SF3 in 2022 and TSMC at N2 in 2025 &#8212; replace the FinFET fin with horizontal silicon nanosheets surrounded on all four sides by gate metal. This architecture introduces multiple new FEOL CMP requirements with no pre-existing qualification baseline.<\/p>\n  <h3>New GAA-Specific CMP Steps<\/h3>\n  <ul>\n    <li><strong>SiGe\/Si nanosheet stack planarization:<\/strong> Requires controlled Si:SiGe selectivity near 1:1 and sub-2 nm WIWNU &#8212; a new formulation target with no FinFET precedent.<\/li>\n    <li><strong>Inner spacer recess CMP:<\/strong> Spacer fill must be precisely recessed within the vertical space between nanosheets &#8212; process window measured in single nanometers.<\/li>\n    <li><strong>Gate metal CMP for nanosheet fill:<\/strong> Three-material co-polish (gate metal, gate fill, ILD) with near-zero dishing tolerance in dimensions 10&#215; smaller than equivalent FinFET gate.<\/li>\n  <\/ul>\n  <p>GAA CMP slurry development is among the most active formulation research areas at all leading suppliers as of 2025. Any CMP excursion at this step destroys the transistor channel irreversibly &#8212; making it the highest-stakes process qualification activity in the 2nm era.<\/p>\n<\/div>\n\n<h2 id=\"cobalt\">4. Challenge 3: Cobalt CMP &#8212; The MOL Contact Revolution<\/h2>\n\n<div class=\"challenge-card cobalt\">\n  <div class=\"ch-header\">\n    <div class=\"ch-icon\">&#129395;<\/div>\n    <div>\n      <p class=\"ch-title\">Cobalt (Co) CMP<\/p>\n      <p class=\"ch-subtitle\">Replacing tungsten in MOL contacts at &#8804;10nm &#8212; with far more complex electrochemistry<\/p>\n    <\/div>\n  <\/div>\n  <div class=\"ch-specs\">\n    <span class=\"ch-pill\">Resistivity: 6&#8211;8 &#956;&#937;&#183;cm<\/span>\n    <span class=\"ch-pill\">Contact diameter: &lt;20 nm<\/span>\n    <span class=\"ch-pill orange\">Galvanic corrosion: High risk<\/span>\n    <span class=\"ch-pill red\">Defect risk: Highest in FEOL CMP<\/span>\n    <span class=\"ch-pill green\">HVM: Intel 10nm+, TSMC N7+, Samsung SF4<\/span>\n  <\/div>\n  <p>Cobalt replaced tungsten in MOL contacts at 10nm and below, driven by lower contact resistance at sub-20 nm diameters and superior ALD gap-fill. Its electrochemical behavior is dramatically more complex than tungsten&#39;s &#8212; creating a CMP formulation challenge that took the industry several years to solve at production defectivity levels.<\/p>\n  <p>Cobalt is electrochemically active across a wide pH range. In contact with adjacent TiN liner or SiO&#8322; ILD, it forms galvanic cells driving localized dissolution and microscopic pitting even without mechanical abrasion. Successful Co CMP slurry requires simultaneous optimization of: H&#8322;O&#8322; oxidizer (0.5&#8211;2 wt%, temperature-sensitive); corrosion inhibitors selective for Co\/TiN galvanic suppression; chelating agents for Co&#178;&#8314;\/Co&#179;&#8314; management; and near-neutral to mildly acidic pH (4&#8211;7). See our <a href=\"https:\/\/jeez-semicon.com\/ja\/blog\/copper-cmp-slurry-dual-damascene-process-formulation-defect-control-complete-engineering-guide\/\">\u9285CMP\u30b9\u30e9\u30ea\u30fc<\/a> guide for broader BEOL metal CMP context.<\/p>\n<\/div>\n\n<h2 id=\"ruthenium\">5. Challenge 4: Ruthenium CMP &#8212; The Next Frontier<\/h2>\n\n<div class=\"challenge-card ru\">\n  <div class=\"ch-header\">\n    <div class=\"ch-icon\">&#128992;<\/div>\n    <div>\n      <p class=\"ch-title\">Ruthenium (Ru) CMP<\/p>\n      <p class=\"ch-subtitle\">The most chemically inert metal in the advanced node materials toolkit<\/p>\n    <\/div>\n  <\/div>\n  <div class=\"ch-specs\">\n    <span class=\"ch-pill\">Bulk resistivity: 7.1 &#956;&#937;&#183;cm<\/span>\n    <span class=\"ch-pill\">ALD thickness: &lt;1 nm feasible<\/span>\n    <span class=\"ch-pill orange\">Native oxide RuO&#8322;: Dense, conductive<\/span>\n    <span class=\"ch-pill red\">CMP status: Active R&amp;D (2025)<\/span>\n    <span class=\"ch-pill green\">Target: 2nm barrier\/liner\/local interconnect<\/span>\n  <\/div>\n  <p>Ruthenium is the leading candidate for barrier, liner, and local interconnect at 2nm and beyond: low bulk resistivity, excellent electromigration resistance, and ALD deposition at sub-1 nm thickness. It presents the most formidable CMP challenge of any advanced node metal &#8212; its native oxide RuO&#8322; is dense, adherent, and <em>electrically conductive<\/em>. The standard CMP strategy of forming a soft removable surface oxide simply does not work for Ru: RuO&#8322; is harder than most abrasive particles.<\/p>\n  <p>Effective Ru removal requires either strong oxidizers forming soluble RuO&#8324;&#178;&#8315; species (raising volatility and safety concerns) or strongly acidic conditions dissolving Ru&#178;&#8314;\/Ru&#179;&#8314; directly. Active research directions include periodate (IO&#8324;&#8315;) oxidizers, ceric ammonium nitrate (CAN), and plasma-assisted pre-activation. As of 2025, no commercially qualified production Ru CMP slurry exists broadly &#8212; first qualifications at leading 2nm fabs are expected by 2026&#8211;2027, making this the most actively watched frontier in CMP formulation science.<\/p>\n<\/div>\n\n<div class=\"cmp-cta\">\n  <h3>Advanced Node CMP Application? Talk to Our Engineers.<\/h3>\n  <p>Jizhi Electronic Technology supports CMP slurry qualification for oxide, STI, and metal applications from our Wuxi, Jiangsu facility.<\/p>\n  <a href=\"https:\/\/jeez-semicon.com\/ja\/contact\/\">Request a Technical Discussion &#8594;<\/a>\n<\/div>\n\n<h2 id=\"nand\">6. Challenge 5: 3D NAND High-Aspect-Ratio CMP<\/h2>\n\n<div class=\"challenge-card nand\">\n  <div class=\"ch-header\">\n    <div class=\"ch-icon\">&#128994;<\/div>\n    <div>\n      <p class=\"ch-title\">3D NAND HARC CMP<\/p>\n      <p class=\"ch-subtitle\">The highest-topography, highest-MRR CMP challenge in production today<\/p>\n    <\/div>\n  <\/div>\n  <div class=\"ch-specs\">\n    <span class=\"ch-pill\">Step height: 3&#8211;8 &#956;m<\/span>\n    <span class=\"ch-pill\">Layer count: 128 &#8594; 200 &#8594; 300+<\/span>\n    <span class=\"ch-pill green\">W MRR required: 4,000&#8211;6,000 &#8491;\/min<\/span>\n    <span class=\"ch-pill orange\">WIWNU over extreme topography: High challenge<\/span>\n  <\/div>\n  <p>3D NAND presents a CMP challenge orthogonal to advanced logic: rather than lateral miniaturization, it demands CMP over extreme vertical topography. As manufacturers stack 200, 300, and eventually 400 layer pairs, the tungsten word line fill creates step heights of 3&#8211;8 &#956;m that must be globally planarized within lithography WIWNU budgets.<\/p>\n  <p>CMP on extreme topography produces a center-fast or edge-fast polish profile driven by differential contact pressure at topographic peaks &#8212; worsening systematically as layer count increases. Advanced 3D NAND W slurry addresses this through: <strong>viscosity-modified carriers<\/strong> using shear-thinning polymer additives; <strong>sustained high-MRR formulation<\/strong> maintaining 4,000&#8211;6,000 &#8491;\/min W removal across the full 300mm wafer for extended cycle times; and <strong>pad&#8211;slurry co-optimization<\/strong> requiring jointly engineered pad groove geometry and slurry flow distribution. The 3D NAND CMP segment is one of the fastest-growing tungsten slurry applications &#8212; see our <a href=\"https:\/\/jeez-semicon.com\/ja\/blog\/cmp-slurry-market-size-growth-forecast-2025-2032-a-complete-industry-analysis\/\">CMP Slurry Market<\/a> analysis for growth projections.<\/p>\n<\/div>\n\n<h2 id=\"packaging\">7. Challenge 6: Advanced Packaging CMP<\/h2>\n\n<div class=\"challenge-card pkg\">\n  <div class=\"ch-header\">\n    <div class=\"ch-icon\">&#128308;<\/div>\n    <div>\n      <p class=\"ch-title\">Advanced Packaging CMP<\/p>\n      <p class=\"ch-subtitle\">TSV reveal, RDL copper, hybrid bonding &#8212; fastest-growing new CMP segment (~18% CAGR)<\/p>\n    <\/div>\n  <\/div>\n  <div class=\"ch-specs\">\n    <span class=\"ch-pill\">TSV diameter: 5&#8211;50 &#956;m<\/span>\n    <span class=\"ch-pill\">RDL Cu thickness: 2&#8211;10 &#956;m<\/span>\n    <span class=\"ch-pill green\">Growth: ~18% CAGR 2024&#8211;2032<\/span>\n    <span class=\"ch-pill orange\">New substrates: Glass, organic polymer<\/span>\n  <\/div>\n  <p>Advanced packaging &#8212; CoWoS, SoIC, HBM stacking, fan-out wafer-level packaging &#8212; is the fastest-growing CMP application segment, driven by AI infrastructure demand for die-to-die bandwidth achievable only through tight 3D integration. Its CMP challenges are fundamentally different from conventional FEOL or BEOL processing.<\/p>\n  <p><strong>TSV Cu CMP:<\/strong> 5&#8211;20 &#956;m Cu overburden requires sustained high-MRR polishing over 20&#8211;40 minute cycles, exposing H&#8322;O&#8322; decomposition and pH drift limitations negligible in standard 2&#8211;5 minute Cu CMP. <strong>RDL Cu CMP:<\/strong> Fan-out packaging RDL copper forms in polymer dielectrics (polyimide, PBO) requiring near-neutral pH, low-abrasive-concentration formulations incompatible with standard alkaline oxide slurry. <strong>Hybrid bonding surface preparation:<\/strong> TSMC SoIC and Sony stacked sensor hybrid bonding requires Ra &lt;0.5 nm and atomic-level planarity across 300mm &#8212; arguably the most demanding CMP specification in semiconductor manufacturing, requiring near-abrasive-free or AFS chemistry.<\/p>\n<\/div>\n\n<h2 id=\"afs\">8. Challenge 7: Abrasive-Free Slurry (AFS) for Defect-Zero Applications<\/h2>\n\n<div class=\"challenge-card afs\">\n  <div class=\"ch-header\">\n    <div class=\"ch-icon\">&#128142;<\/div>\n    <div>\n      <p class=\"ch-title\">Abrasive-Free Slurry (AFS)<\/p>\n      <p class=\"ch-subtitle\">When even a single abrasive-induced scratch is unacceptable<\/p>\n    <\/div>\n  <\/div>\n  <div class=\"ch-specs\">\n    <span class=\"ch-pill\">MRR: &lt;200 &#8491;\/min<\/span>\n    <span class=\"ch-pill green\">Surface roughness: Ra &lt;0.1 nm<\/span>\n    <span class=\"ch-pill green\">Scratch risk: Near-zero<\/span>\n    <span class=\"ch-pill\">Applications: EUV mask blanks, SOI wafers, ULK final finish<\/span>\n  <\/div>\n  <p>For EUV photomask blank final polish, SOI wafer preparation, and 2nm node ULK ILD finishing, even a single micro-scratch from an abrasive particle represents an unacceptable yield risk. Abrasive-free slurry achieves removal through purely chemical mechanisms &#8212; oxidizer-driven surface activation combined with complexing-agent-assisted molecular dissolution &#8212; with no particulate contact. AFS sacrifices removal rate (&lt;200 &#8491;\/min) for essentially perfect surface quality, making it exclusively a final finishing step after bulk removal by conventional abrasive CMP.<\/p>\n  <div class=\"cmp-box purple\">\n    <p class=\"box-title\">&#128302; EUV Mask Blank CMP<\/p>\n    <p style=\"margin:0;\">A single scratch on an EUV mask blank can print as a defect on every wafer exposed through it for 50,000&#8211;100,000 wafer lifetimes. The cost of a single mask print defect, amortized across all affected wafers, can exceed $1M &#8212; fully justifying AFS-based finishing despite its low throughput. For AFS chemistry context, see our guide on <a href=\"https:\/\/jeez-semicon.com\/ja\/blog\/cmp-slurry-composition-abrasives-chemical-additives-formulation-principles\/\">CMP\u30b9\u30e9\u30ea\u30fc\u306e\u7d44\u6210<\/a>.<\/p>\n  <\/div>\n<\/div>\n\n<h2 id=\"node-comparison\">9. Node-by-Node CMP Requirements Summary<\/h2>\n\n<p>The table below consolidates CMP requirements across node generations. For the full application-type breakdown, see our <a href=\"https:\/\/jeez-semicon.com\/ja\/blog\/cmp-slurry-types-explained-oxide-sti-copper-tungsten-beyond\/\">CMP\u30b9\u30e9\u30ea\u30fc\u306e\u7a2e\u985e<\/a> guide.<\/p>\n\n<div class=\"cmp-table-wrap\">\n  <table class=\"cmp-table\">\n    <thead>\n      <tr>\n        <th>Node<\/th>\n        <th>~CMP Steps<\/th>\n        <th>Key New CMP Challenge<\/th>\n        <th>Critical Slurry Requirement<\/th>\n        <th>New Materials<\/th>\n      <\/tr>\n    <\/thead>\n    <tbody>\n      <tr><td><strong>28nm<\/strong><\/td><td>~12<\/td><td>Low-k ILD (k &#8776; 3.0)<\/td><td>Reduced abrasive pressure; surfactant stabilization<\/td><td>SiCOH; TaN\/Ta barrier<\/td><\/tr>\n      <tr><td><strong>14\/16nm<\/strong><\/td><td>~15<\/td><td>FinFET STI; ULK (k &#8776; 2.7)<\/td><td>High-selectivity ceria STI; gentle ULK oxide<\/td><td>High-k\/metal gate; FinFET fins<\/td><\/tr>\n      <tr><td><strong>10\/7nm<\/strong><\/td><td>~18<\/td><td>Co contact; ULK (k &#8776; 2.5)<\/td><td>Co-compatible pH; inhibitor co-optimization<\/td><td>Cobalt contacts; porous ULK<\/td><\/tr>\n      <tr><td><strong>5nm<\/strong><\/td><td>~22<\/td><td>EUV integration; tighter WIWNU<\/td><td>WIWNU &lt;1.5%; LPC &lt;50\/mL; pH &#177;0.1<\/td><td>EUV resist; Mo hard mask<\/td><\/tr>\n      <tr><td><strong>3nm<\/strong><\/td><td>~25<\/td><td>Late FinFET; early GAA; ULK (k &lt;2.4)<\/td><td>Sub-2 nm dishing; AFS for ELK finish<\/td><td>ELK dielectric; Ru liner (early)<\/td><\/tr>\n      <tr><td><strong>2nm<\/strong><\/td><td>&gt;28<\/td><td>GAA production; Ru barrier<\/td><td>GAA-specific selectivity; Ru oxidizer R&amp;D<\/td><td>GAA nanosheets; Ru barrier; Mo gate<\/td><\/tr>\n      <tr><td><strong>A14\/1.4nm<\/strong><\/td><td>30+<\/td><td>CFET; ELK (k &lt;2.0); air gap ILD<\/td><td>AFS for most dielectric layers; new metal<\/td><td>CFET; 2D materials; air gap ILD<\/td><\/tr>\n    <\/tbody>\n  <\/table>\n<\/div>\n\n<h3>Conventional vs. Advanced-Node CMP Slurry: Key Specification Shifts<\/h3>\n<div class=\"vs-grid\">\n  <div class=\"vs-col legacy\">\n    <div class=\"vs-label\">&#127981; Mature Node (&gt;28nm)<\/div>\n    <ul>\n      <li>WIWNU: &lt;3% (1&#963;) acceptable<\/li>\n      <li>Defectivity: &lt;100 scratches\/wafer<\/li>\n      <li>D99: &lt;300 nm (silica)<\/li>\n      <li>LPC (&gt;0.5 &#956;m): &lt;500\/mL<\/li>\n      <li>Dishing: &lt;50 nm<\/li>\n      <li>Trace metals: &lt;20 ppb\/element<\/li>\n      <li>pH control: &#177;0.3 acceptable<\/li>\n      <li>Oxidizer assay: &#177;10% relative<\/li>\n    <\/ul>\n  <\/div>\n  <div class=\"vs-col advanced\">\n    <div class=\"vs-label\">&#9883;&#65039; Advanced Node (&lt;5nm)<\/div>\n    <ul>\n      <li>WIWNU: &lt;1.5% (1&#963;) required<\/li>\n      <li>Defectivity: &lt;20 scratches; critical &lt;3<\/li>\n      <li>D99: &lt;150 nm (silica); &lt;250 nm (ceria)<\/li>\n      <li>LPC (&gt;0.5 &#956;m): &lt;50\/mL<\/li>\n      <li>Dishing: &lt;20 nm (BEOL)<\/li>\n      <li>Trace metals: &lt;5 ppb\/element (ICP-MS)<\/li>\n      <li>pH control: &#177;0.1 required<\/li>\n      <li>Oxidizer assay: &#177;3% relative<\/li>\n    <\/ul>\n  <\/div>\n<\/div>\n\n<h2 id=\"faq\">10. Frequently Asked Questions<\/h2>\n\n<div class=\"cmp-faq\" itemscope itemtype=\"https:\/\/schema.org\/FAQPage\">\n\n  <div class=\"faq-item\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n    <p class=\"faq-question\" itemprop=\"name\">Why can&#39;t existing CMP slurries be used at advanced nodes without reformulation?<\/p>\n    <div class=\"faq-answer\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n      <div itemprop=\"text\">Advanced nodes introduce new target materials (Co, Ru, ELK dielectrics) incompatible with legacy oxidizer\/inhibitor systems; tighter specification windows that expose formulation tails acceptable at mature nodes; and new process integration failure modes &#8212; film delamination, galvanic corrosion, contamination &#8212; that require active reformulation at every node generation, not simply spec-tightening of existing products.<\/div>\n    <\/div>\n  <\/div>\n\n  <div class=\"faq-item\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n    <p class=\"faq-question\" itemprop=\"name\">How does EUV lithography affect CMP slurry requirements?<\/p>\n    <div class=\"faq-answer\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n      <div itemprop=\"text\">EUV&#39;s shallow depth-of-focus (30&#8211;60 nm) tightens post-CMP planarity budgets for EUV-exposed layers to &#177;5&#8211;10 nm versus &#177;15&#8211;20 nm acceptable for ArFi immersion &#8212; tightening WIWNU specifications for every CMP step preceding an EUV exposure. Additionally, EUV mask blank fabrication requires AFS-quality finish (Ra &lt;0.1 nm, zero particle defects), defining the current performance ceiling for CMP slurry defectivity.<\/div>\n    <\/div>\n  <\/div>\n\n  <div class=\"faq-item\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n    <p class=\"faq-question\" itemprop=\"name\">Is cobalt CMP qualified in high-volume production?<\/p>\n    <div class=\"faq-answer\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n      <div itemprop=\"text\">Yes &#8212; cobalt CMP is in HVM at Intel (10nm SuperFin), TSMC (N7+\/N5), and Samsung (SF4\/SF3). The core formulation challenges are solved for these nodes. Each successive node tightens the window further &#8212; smaller contact diameters, thinner TiN liners &#8212; requiring incremental reformulation and re-qualification even with the base Co CMP chemistry established.<\/div>\n    <\/div>\n  <\/div>\n\n  <div class=\"faq-item\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n    <p class=\"faq-question\" itemprop=\"name\">What does GAA mean for CMP step count per wafer?<\/p>\n    <div class=\"faq-answer\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n      <div itemprop=\"text\">Gate-all-around adds approximately 3&#8211;5 new FEOL CMP steps versus FinFET: nanosheet stack planarization, inner spacer fill recess, and gate metal overburden removal. The 2nm GAA node (TSMC N2) is estimated at over 28 CMP steps per wafer versus ~22 for 5nm FinFET &#8212; a 27% increase in CMP step count from a single node generation.<\/div>\n    <\/div>\n  <\/div>\n\n  <div class=\"faq-item\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n    <p class=\"faq-question\" itemprop=\"name\">When will ruthenium CMP slurry be in production?<\/p>\n    <div class=\"faq-answer\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n      <div itemprop=\"text\">As of mid-2025, Ru CMP slurry is in active development at all major global suppliers but has not achieved broad production qualification. Full production qualification is expected to be required at the 2nm node, with commercial products qualified at leading fabs expected by 2026&#8211;2027.<\/div>\n    <\/div>\n  <\/div>\n\n<\/div>\n\n<h2>\u7d50\u8ad6<\/h2>\n<p>The progression from 28nm to 2nm represents more than a decade of continuous CMP formulation innovation &#8212; ULK mechanical fragility, GAA transistor geometry, cobalt and ruthenium electrochemistry, 3D NAND topography, advanced packaging surface requirements, and the approaching limits of abrasive-based CMP collectively define the most technically demanding era in CMP slurry history. For process engineers, treating slurry as a precisely co-engineered process variable &#8212; not a commodity consumable &#8212; becomes ever more consequential as the node shrinks.<\/p>\n<p>For foundational CMP slurry knowledge, return to the <a href=\"https:\/\/jeez-semicon.com\/ja\/blog\/what-is-cmp-slurry-a-complete-guide-to-chemical-mechanical-planarization-slurry\/\">CMP\u30b9\u30e9\u30ea\u30fc\u30ac\u30a4\u30c9<\/a>. For formulation chemistry details, see <a href=\"https:\/\/jeez-semicon.com\/ja\/blog\/cmp-slurry-composition-abrasives-chemical-additives-formulation-principles\/\">CMP\u30b9\u30e9\u30ea\u30fc\u306e\u7d44\u6210<\/a>. For market growth context, see the <a href=\"https:\/\/jeez-semicon.com\/ja\/blog\/cmp-slurry-market-size-growth-forecast-2025-2032-a-complete-industry-analysis\/\">CMP Slurry Market Forecast 2025&#8211;2032<\/a>.<\/p>\n\n<a class=\"back-to-pillar\" href=\"https:\/\/jeez-semicon.com\/ja\/blog\/what-is-cmp-slurry-a-complete-guide-to-chemical-mechanical-planarization-slurry\/\">\n  <span class=\"btp-icon\">\ud83c\udfe0<\/span>\n  <div class=\"btp-text\">\n    <span class=\"btp-label\">CMP\u30b9\u30e9\u30ea\u30fc\u30b7\u30ea\u30fc\u30ba<\/span>\n    <span class=\"btp-title\">\u2190 \u623b\u308bCMP\u30b9\u30e9\u30ea\u30fc\u3068\u306f\uff1f\u5b8c\u5168\u30ac\u30a4\u30c9<\/span>\n  <\/div>\n<\/a>\n\n<\/article>\n\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"headline\":\"CMP Slurry for Advanced Nodes: 5nm, 3nm, 2nm & Beyond\",\"description\":\"Technical guide to CMP slurry challenges at advanced nodes: ULK dielectric, GAA, cobalt, ruthenium, 3D NAND, advanced packaging, and abrasive-free slurry.\",\"author\":{\"@type\":\"Organization\",\"name\":\"Jizhi Electronic Technology Co., Ltd.\"},\"publisher\":{\"@type\":\"Organization\",\"name\":\"Jizhi Electronic Technology Co., Ltd.\",\"logo\":{\"@type\":\"ImageObject\",\"url\":\"https:\/\/yourwebsite.com\/logo.png\"}},\"datePublished\":\"2025-06-01\",\"mainEntityOfPage\":\"https:\/\/yourwebsite.com\/cmp-slurry-advanced-nodes\/\",\"isPartOf\":{\"@type\":\"WebPage\",\"@id\":\"https:\/\/yourwebsite.com\/cmp-slurry-complete-guide\/\"}},{\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Why can't existing CMP slurries be used at advanced nodes without reformulation?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Advanced nodes introduce new materials incompatible with legacy chemistry, tighter specification windows exposing formulation tails, and new integration failure modes requiring active reformulation at every node generation.\"}},{\"@type\":\"Question\",\"name\":\"What does GAA mean for CMP step count?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"GAA adds 3-5 new FEOL CMP steps versus FinFET. 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Mechanically fragile ultra-low-k dielectrics, new metal conductors with no CMP precedent, three-dimensional  &#8230;<\/p>","protected":false},"author":1,"featured_media":1507,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[9,59],"tags":[],"class_list":["post-1483","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-industry"],"acf":[],"_links":{"self":[{"href":"https:\/\/jeez-semicon.com\/ja\/wp-json\/wp\/v2\/posts\/1483","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jeez-semicon.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jeez-semicon.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jeez-semicon.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jeez-semicon.com\/ja\/wp-json\/wp\/v2\/comments?post=1483"}],"version-history":[{"count":5,"href":"https:\/\/jeez-semicon.com\/ja\/wp-json\/wp\/v2\/posts\/1483\/revisions"}],"predecessor-version":[{"id":1554,"href":"https:\/\/jeez-semicon.com\/ja\/wp-json\/wp\/v2\/posts\/1483\/revisions\/1554"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jeez-semicon.com\/ja\/wp-json\/wp\/v2\/media\/1507"}],"wp:attachment":[{"href":"https:\/\/jeez-semicon.com\/ja\/wp-json\/wp\/v2\/media?parent=1483"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jeez-semicon.com\/ja\/wp-json\/wp\/v2\/categories?post=1483"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jeez-semicon.com\/ja\/wp-json\/wp\/v2\/tags?post=1483"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}