{"id":2269,"date":"2026-06-03T13:44:54","date_gmt":"2026-06-03T05:44:54","guid":{"rendered":"https:\/\/jeez-semicon.com\/?p=2269"},"modified":"2026-06-03T13:44:54","modified_gmt":"2026-06-03T05:44:54","slug":"cmp-slurry-for-advanced-packaging-and-tsv","status":"publish","type":"post","link":"https:\/\/jeez-semicon.com\/zh\/blog\/cmp-slurry-for-advanced-packaging-and-tsv\/","title":{"rendered":"CMP Slurry for Advanced Packaging and TSV"},"content":{"rendered":"<!-- ===== JEEZ \u00b7 CMP Slurry for Advanced Packaging and TSV \u2014 paste into Gutenberg \"Custom HTML\" block ===== -->\n\n<style>\n@import url('https:\/\/fonts.googleapis.com\/css2?family=Sora:wght@500;600;700;800&family=IBM+Plex+Sans:ital,wght@0,400;0,500;0,600;1,400&family=IBM+Plex+Mono:wght@500;600&display=swap');\n.jz-d3-wrap{\n  --ink:#0a1f33; --navy:#0d2a44; --navy2:#123a5c;\n  --acc:#178f79; --accd:#116b5c; --accl:#e3f4f0;\n  --text:#1c2b3a; --muted:#5a6b7b; --line:#e1e8ef; --bg:#f6f9fb; --card:#fff;\n  --r:16px; 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120%,color-mix(in srgb,var(--acc) 55%, transparent),transparent 60%),linear-gradient(120deg,#071a2c,#0d2a44 60%,#123a5c);}\n.jz-d3-wrap .ps-cta:before{content:\"\";position:absolute;inset:0;opacity:.4;background-image:linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);background-size:36px 100%;}\n.jz-d3-wrap .ps-cta>*{position:relative;z-index:1;}\n.jz-d3-wrap .ps-cta h2{font-family:'Sora',sans-serif;font-weight:800;font-size:clamp(21px,2.9vw,28px);color:#fff;margin:0 0 10px;letter-spacing:-.01em;border:none;padding:0;}\n.jz-d3-wrap .ps-cta p{color:#cfe2ec;max-width:62ch;margin-bottom:22px;}\n.jz-d3-wrap .ps-btn{display:inline-flex;align-items:center;gap:10px;background:var(--acc);color:#04222e;font-family:'Sora',sans-serif;font-weight:700;font-size:16px;padding:14px 28px;border-radius:50px;border:none;transition:.2s;box-shadow:0 8px 24px color-mix(in srgb,var(--acc) 45%, transparent);}\n.jz-d3-wrap .ps-btn:hover{filter:brightness(1.1);color:#04222e;transform:translateY(-2px);border:none;}\n.jz-d3-wrap .ps-btn span{font-family:'IBM Plex Mono',monospace;}\n.jz-d3-wrap .ps-signoff{font-size:14px;color:var(--muted);border-top:1px solid var(--line);padding-top:20px;margin-top:38px;font-style:italic;}\n@media(max-width:760px){\n  .jz-d3-wrap{font-size:16px;}\n  .jz-d3-wrap .ps-hero{padding:40px 24px 36px;}\n  .jz-d3-wrap .ps-toc{padding:22px 20px;}\n  .jz-d3-wrap .ps-toc ol{grid-template-columns:1fr;gap:0;}\n  .jz-d3-wrap .ps-cards{grid-template-columns:1fr;}\n  .jz-d3-wrap .ps-cta{padding:34px 24px;}\n}\n<\/style>\n\n<div class=\"jz-d3-wrap\">\n  <header class=\"ps-hero\">\n    <div class=\"ps-eyebrow\">JEEZ \u00b7 Applications<\/div>\n    <h1>CMP Slurry for Advanced Packaging and TSV<\/h1>\n    <p class=\"ps-lead\">Advanced packaging and through-silicon vias have made CMP critical to the back end as well as the front end. This guide explains how CMP slurry supports advanced packaging and TSV \u2014 the thick-copper, dissimilar-material and hybrid-bonding challenges and how slurry choice adapts.<\/p>\n    <div class=\"ps-meta\"><span>By <b>JEEZ \u2014 Jizhi Electronic Technology Co., Ltd.<\/b><\/span><span>Updated <b>June 2026<\/b><\/span><\/div>\n  <\/header>\n\n  <nav class=\"ps-toc\" aria-label=\"Table of contents\">\n    <h2>\u76ee\u5f55<\/h2>\n    <ol><li><a href=\"#jz-d3-role\">CMP Moves Into Packaging<\/a><\/li><li><a href=\"#jz-d3-tsv\">TSV Reveal and the Thick-Copper Challenge<\/a><\/li><li><a href=\"#jz-d3-rdl\">RDL and Fan-Out Planarization<\/a><\/li><li><a href=\"#jz-d3-hybrid\">Hybrid Bonding&#x27;s Demands<\/a><\/li><li><a href=\"#jz-d3-dissimilar\">Planarizing Dissimilar Materials<\/a><\/li><li><a href=\"#jz-d3-select\">Selecting a Packaging CMP Slurry<\/a><\/li><\/ol>\n  <\/nav>\n\n  <section class=\"ps-sec\" id=\"jz-d3-role\"><h2>CMP Moves Into Packaging<\/h2><p>Heterogeneous integration \u2014 stacking and bonding dies with through-silicon vias (TSV), redistribution layers (RDL), fan-out structures and hybrid bonding \u2014 has pushed CMP well beyond the transistor levels. These steps demand planar, clean surfaces, and the slurry requirements differ markedly from classic front-end CMP because the feature scale is larger and the material set unusual. For the selection method, see <a href=\"https:\/\/jeez-semicon.com\/zh\/blog\/How-to-Select-a-CMP-Slurry-by-Material-and-Process\/\" target=\"_blank\" rel=\"noopener\">how to select a CMP slurry by material and process<\/a>; for fundamentals, the <a href=\"https:\/\/jeez-semicon.com\/zh\/blog\/What-Is-Polishing-Slurry\/\" target=\"_blank\" rel=\"noopener\">pillar guide<\/a>.<\/p><p>As performance gains increasingly come from packaging rather than transistor scaling alone, CMP for advanced packaging has become a fast-growing and strategically important application through 2026 and beyond.<\/p><\/section><section class=\"ps-sec\" id=\"jz-d3-tsv\"><h2>TSV Reveal and the Thick-Copper Challenge<\/h2><p>TSV and RDL involve far thicker copper than damascene interconnects \u2014 micrometres rather than nanometres \u2014 so CMP must remove large volumes of copper while still controlling dishing and erosion at the larger feature scale. In <b>TSV reveal<\/b>, the back of a thinned wafer is polished to expose the copper vias, which requires planarising silicon, liner and copper together. This is an extension of the chemistry described in the <a href=\"https:\/\/jeez-semicon.com\/zh\/blog\/Copper-CMP-Slurry-Selection-Guide\/\" target=\"_blank\" rel=\"noopener\">copper CMP slurry guide<\/a> \u2014 oxidiser, complexing and inhibitor balance \u2014 scaled for thick-copper overburden and coarser topography.<\/p><div class='ps-callout'><span class='tag'>Scale changes everything<\/span><p>Removing micrometres of copper instead of nanometres shifts the priorities toward high, stable rate and large-feature dishing control, while keeping defectivity low enough for subsequent bonding.<\/p><\/div><\/section><section class=\"ps-sec\" id=\"jz-d3-rdl\"><h2>RDL and Fan-Out Planarization<\/h2><p>Redistribution layers and fan-out packaging route signals across a reconstituted wafer or panel, often combining copper traces with polymer dielectrics and, in fan-out, moulding compound. CMP planarises these layers so that fine-line lithography can pattern the next level. The mix of soft polymer and copper, sometimes over large panel areas, demands slurries and processes tuned for uniformity across non-standard substrates rather than reused front-end products.<\/p><\/section><section class=\"ps-sec\" id=\"jz-d3-hybrid\"><h2>Hybrid Bonding&#x27;s Demands<\/h2><p>Hybrid bonding joins dies via dielectric-to-dielectric and copper-to-copper contact, and it is exquisitely sensitive to surface topography. The CMP step must deliver extremely flat, clean surfaces with copper recess held within a tight, controlled window \u2014 too much or too little recess prevents reliable bonding. This makes planarity, recess control and defectivity even more critical than in conventional steps, and it is one of the most demanding CMP applications in advanced packaging.<\/p><\/section><section class=\"ps-sec\" id=\"jz-d3-dissimilar\"><h2>Planarizing Dissimilar Materials<\/h2><p>Packaging surfaces often combine copper, dielectric, polymer, silicon and moulding compound \u2014 materials with very different removal behaviour \u2014 so selectivity and uniformity across dissimilar materials are central. The engineering parallels other demanding, specialised substrates such as the hard-material work in the <a href=\"https:\/\/jeez-semicon.com\/zh\/blog\/Sapphire-Substrate-Polishing-Slurry-Guide\/\" target=\"_blank\" rel=\"noopener\">sapphire polishing guide<\/a>, in that the slurry must be tailored precisely to an unusual material set rather than adapted from a standard step.<\/p><\/section><section class=\"ps-sec\" id=\"jz-d3-select\"><h2>Selecting a Packaging CMP Slurry<\/h2><p>Define your structure \u2014 TSV reveal, RDL or fan-out planarization, or hybrid-bonding surface preparation \u2014 and its copper thickness, recess window, material mix and flatness targets. Prioritise stable high-rate copper removal for thick layers, and tight planarity and recess control for bonding surfaces, then validate on your own integration and substrate format. As packaging scales, slurry tailored to these steps is increasingly a competitive differentiator rather than a commodity choice.<\/p><\/section>\n\n  <section class=\"ps-related\">\n    <h2>Continue Learning<\/h2>\n    <p class=\"sub\">Explore the rest of the JEEZ polishing slurry knowledge series.<\/p>\n    <div class=\"ps-cards\"><a class=\"ps-card pillar\" href=\"https:\/\/jeez-semicon.com\/zh\/blog\/What-Is-Polishing-Slurry\/\" target=\"_blank\" rel=\"noopener\"><span class=\"k\">Start here \u00b7 Pillar guide<\/span><span class=\"t\">What Is Polishing Slurry? The Complete Guide<\/span><\/a><a class=\"ps-card\" href=\"https:\/\/jeez-semicon.com\/zh\/blog\/Copper-CMP-Slurry-Selection-Guide\/\" target=\"_blank\" rel=\"noopener\"><span class=\"k\">Related guide<\/span><span class=\"t\">Copper CMP Slurry Selection Guide<\/span><\/a><a class=\"ps-card\" href=\"https:\/\/jeez-semicon.com\/zh\/blog\/How-to-Select-a-CMP-Slurry-by-Material-and-Process\/\" target=\"_blank\" rel=\"noopener\"><span class=\"k\">Related guide<\/span><span class=\"t\">How to Select a CMP Slurry by Material and Process<\/span><\/a><a class=\"ps-card\" href=\"https:\/\/jeez-semicon.com\/zh\/blog\/Sapphire-Substrate-Polishing-Slurry-Guide\/\" target=\"_blank\" rel=\"noopener\"><span class=\"k\">Related guide<\/span><span class=\"t\">Sapphire Substrate Polishing Slurry Guide<\/span><\/a><\/div>\n  <\/section>\n\n  <section class=\"ps-sec ps-faq\" id=\"jz-d3-faq\"><h2>\u5e38\u89c1\u95ee\u9898<\/h2><details open><summary>How is CMP used in advanced packaging?<\/summary><div class=\"ans\">CMP planarizes through-silicon vias, redistribution and fan-out layers, and hybrid-bonding surfaces in heterogeneous integration. It removes thick copper, reveals TSVs, and creates the flat, clean, recess-controlled surfaces that stacking and bonding require.<\/div><\/details><details><summary>How does TSV CMP differ from interconnect CMP?<\/summary><div class=\"ans\">TSV and RDL involve much thicker copper and coarser topography than damascene interconnects, so the slurry must remove large copper volumes at high, stable rate while controlling dishing and erosion at a larger feature scale. TSV reveal also planarises silicon, liner and copper together.<\/div><\/details><details><summary>Why is hybrid bonding so sensitive to CMP?<\/summary><div class=\"ans\">Hybrid bonding relies on direct dielectric-to-dielectric and copper-to-copper contact, which demands extremely flat, clean surfaces with copper recess held in a tight window. Too much or too little recess prevents reliable bonding, so planarity, recess control and defectivity are critical.<\/div><\/details><details><summary>What makes packaging CMP slurries different?<\/summary><div class=\"ans\">They must handle thick copper and surfaces combining dissimilar materials such as polymer, silicon and moulding compound, balancing high stable removal rate with tight planarity, recess and defectivity control. Slurries are tailored to the specific packaging structure rather than reused from front-end steps.<\/div><\/details><details><summary>Why is advanced packaging CMP growing in importance?<\/summary><div class=\"ans\">As performance gains increasingly come from packaging and heterogeneous integration rather than transistor scaling alone, the CMP steps that enable TSV, RDL, fan-out and hybrid bonding have become strategically important, making tailored packaging slurries a competitive differentiator.<\/div><\/details><\/section>\n\n  <section class=\"ps-cta\">\n    <h2>Talk to the JEEZ slurry engineering team<\/h2>\n    <p>From first slurry selection to defectivity optimisation and multi-source qualification, JEEZ \u2014 Jizhi Electronic Technology Co., Ltd. \u2014 helps you match the right polishing slurry to your material and process targets.<\/p>\n    <a class=\"ps-btn\" href=\"https:\/\/jeez-semicon.com\/zh\/contact\/\" target=\"_blank\" rel=\"noopener\">Contact JEEZ <span>\u2192<\/span><\/a>\n  <\/section>\n\n  <p class=\"ps-signoff\">Part of the JEEZ Polishing Slurry knowledge series. Reviewed and updated June 2026 by Jizhi Electronic Technology Co., Ltd.<\/p>\n<\/div>\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\":\"https:\/\/schema.org\",\"@type\":\"Article\",\n  \"headline\":\"CMP Slurry for Advanced Packaging and TSV\",\n  \"description\":\"How CMP slurry supports advanced packaging and TSV: thick-copper removal, TSV reveal, RDL and fan-out planarization, hybrid bonding surface requirements, dissimilar materials and slurry selection for heterogeneous integration.\",\n  \"author\":{\"@type\":\"Organization\",\"name\":\"JEEZ \\u2014 Jizhi Electronic Technology Co., Ltd.\",\"url\":\"https:\/\/jeez-semicon.com\/\"},\n  \"publisher\":{\"@type\":\"Organization\",\"name\":\"Jizhi Electronic Technology Co., Ltd.\",\"logo\":{\"@type\":\"ImageObject\",\"url\":\"https:\/\/jeez-semicon.com\/wp-content\/uploads\/jeez-logo.png\"}},\n  \"datePublished\":\"2026-06-01\",\"dateModified\":\"2026-06-01\",\n  \"mainEntityOfPage\":{\"@type\":\"WebPage\",\"@id\":\"https:\/\/jeez-semicon.com\/blog\/CMP-Slurry-for-Advanced-Packaging-and-TSV\"}\n}\n<\/script>\n<script type=\"application\/ld+json\">\n{\n  \"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n    {\"@type\":\"Question\",\"name\":\"How is CMP used in advanced packaging?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"CMP planarizes through-silicon vias, redistribution and fan-out layers, and hybrid-bonding surfaces in heterogeneous integration. It removes thick copper, reveals TSVs, and creates the flat, clean, recess-controlled surfaces that stacking and bonding require.\"}},\n    {\"@type\":\"Question\",\"name\":\"How does TSV CMP differ from interconnect CMP?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"TSV and RDL involve much thicker copper and coarser topography than damascene interconnects, so the slurry must remove large copper volumes at high, stable rate while controlling dishing and erosion at a larger feature scale. TSV reveal also planarises silicon, liner and copper together.\"}},\n    {\"@type\":\"Question\",\"name\":\"Why is hybrid bonding so sensitive to CMP?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Hybrid bonding relies on direct dielectric-to-dielectric and copper-to-copper contact, which demands extremely flat, clean surfaces with copper recess held in a tight window. Too much or too little recess prevents reliable bonding, so planarity, recess control and defectivity are critical.\"}},\n    {\"@type\":\"Question\",\"name\":\"What makes packaging CMP slurries different?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"They must handle thick copper and surfaces combining dissimilar materials such as polymer, silicon and moulding compound, balancing high stable removal rate with tight planarity, recess and defectivity control. Slurries are tailored to the specific packaging structure rather than reused from front-end steps.\"}},\n    {\"@type\":\"Question\",\"name\":\"Why is advanced packaging CMP growing in importance?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"As performance gains increasingly come from packaging and heterogeneous integration rather than transistor scaling alone, the CMP steps that enable TSV, RDL, fan-out and hybrid bonding have become strategically important, making tailored packaging slurries a competitive differentiator.\"}}\n  ]\n}\n<\/script>","protected":false},"excerpt":{"rendered":"<p>JEEZ \u00b7 Applications CMP Slurry for Advanced Packaging and TSV Advanced packaging and through-silicon vias have made CMP critical to the back end as well as the front end. This  &#8230;<\/p>","protected":false},"author":1,"featured_media":2271,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[9,59],"tags":[],"class_list":["post-2269","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\/2269","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=2269"}],"version-history":[{"count":2,"href":"https:\/\/jeez-semicon.com\/zh\/wp-json\/wp\/v2\/posts\/2269\/revisions"}],"predecessor-version":[{"id":2272,"href":"https:\/\/jeez-semicon.com\/zh\/wp-json\/wp\/v2\/posts\/2269\/revisions\/2272"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jeez-semicon.com\/zh\/wp-json\/wp\/v2\/media\/2271"}],"wp:attachment":[{"href":"https:\/\/jeez-semicon.com\/zh\/wp-json\/wp\/v2\/media?parent=2269"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jeez-semicon.com\/zh\/wp-json\/wp\/v2\/categories?post=2269"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jeez-semicon.com\/zh\/wp-json\/wp\/v2\/tags?post=2269"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}