Fab Process Consumables

Fab Process Consumables is one of four peer axes in Fab & Assembly, alongside Fab Facilities, Fab Equipment, and the Manufacturing Flow. It covers the recurring materials that a fab consumes during production — photoresist applied to every lithography pass, process chemicals used in every wet etch and clean, process gases reacted at every deposition and etch step, CMP slurries consumed at every planarization step, and sputtering targets depleted as deposition tools run. A leading-edge 300mm fab running at 100,000 wafer starts per month consumes these materials on an industrial scale — thousands of liters of chemicals per day, tens of thousands of specialty gas cylinders per month, sputtering targets replaced on weekly schedules.

Consumables are distinct from the silicon wafer itself. The wafer is the starting substrate and becomes the die — it is not consumed, it is transformed. Wafer supply, wafer specifications, and wafer deliverables are covered separately under Wafer Specs & Sizes and Wafer Deliverables.

This page uses the in-process integration lens: consumables as they are used at the point of production. The supplier lens — how photoresist is manufactured, how high-purity gases are refined, how slurries and targets are compounded — lives in Materials & IP. The two lenses describe the same materials but from opposite ends of the supply chain. Photoresist is a critical chemical upstream and a lithography input in the fab. Process gases are refined industrial products upstream and reactants at every deposition and etch step in the fab. Both views are correct; this page holds the in-process view.

The Five Consumable Categories

Five consumable categories account for the majority of in-process consumable spending at a leading-edge fab. Each has a distinct consumption profile, a distinct point of use in the manufacturing flow, and a distinct supplier concentration story.

Photoresist

Photoresist is the light-sensitive coating that captures the circuit pattern during lithography. It is applied to the wafer before every exposure and stripped afterward. A leading-edge chip with 90 mask layers passes through 90 coat-expose-develop-strip cycles, each consuming fresh resist. Resist chemistry is matched to the lithography tool: i-line, KrF (248nm), ArF dry (193nm), ArF immersion (193i), EUV (13.5nm), and increasingly High-NA EUV each require a different resist formulation with different sensitivity, resolution, and line-edge roughness characteristics.

The photoresist supplier base is concentrated in Japan. JSR Corporation, Tokyo Ohka Kogyo (TOK), Shin-Etsu Chemical, and Fujifilm together hold the majority of the global photoresist market. EUV resist is tighter: TOK, JSR, and Shin-Etsu are the three qualified volume suppliers for EUV, with years of joint development work between each supplier and each leading-edge foundry baked into the qualification. The 2019 Japan-Korea trade dispute, during which Japan restricted exports of EUV photoresist and other advanced materials to South Korea, remains the canonical demonstration of how much leverage a concentrated resist supply chain holds over semiconductor production. See Critical Chemicals for the supplier-side view.

Process Chemicals

Beyond photoresist, the fab consumes a wide spectrum of liquid chemicals at nearly every process step. Wet etchants include hydrofluoric acid (HF) and buffered oxide etch (BOE) for oxide removal, phosphoric acid for nitride removal, and hydrogen peroxide mixtures (SC-1 and SC-2 in RCA clean chemistry) for wafer cleaning. Photoresist developers use tetramethylammonium hydroxide (TMAH) to dissolve exposed or unexposed resist. Post-etch strippers and polymer removers clean residues without damaging underlying structures. Electroplating chemistries deliver copper into damascene interconnect trenches. Liquid precursors for ALD and CVD (TEOS, TDMAT, HfCl₄, and many more) are vaporized in tool delivery systems to deposit oxide, nitride, and high-k gate dielectric films.

Process chemical supply is more fragmented than the other consumable categories, with different suppliers dominating different chemistries. BASF, Merck (through its EMD Electronics subsidiary, which absorbed Versum and Sigma-Aldrich electronics lines), and Entegris are the broadest-line suppliers. Kanto Chemical and Mitsubishi Chemical are major Japanese suppliers for ultra-high-purity chemicals. Stella Chemifa is a specialty supplier of HF and fluorine chemistries. Solvay serves specialty fluoropolymer and chemical lines. Purity requirements are extreme — typically sub-ppb-level trace metal contamination — and qualification at a fab is chemistry-specific and tool-specific. See Critical Chemicals for the supplier-side view.

Process Gases

Process gases are the largest consumable category by volume and one of the broadest by material diversity. A fab consumes bulk gases (nitrogen, oxygen, argon, hydrogen, helium) in industrial quantities for inert atmospheres, wafer transport, and furnace operation, and specialty gases (silane, ammonia, germane, dichlorosilane, tungsten hexafluoride, boron trichloride, and dozens of others) in smaller quantities as reactants for deposition, etch, and doping steps.

Bulk industrial gas supply is dominated by four global companies: Air Liquide, Linde (including the former Praxair), Air Products & Chemicals, and Taiyo Nippon Sanso (TNSC). These companies typically operate on-site or nearby air separation plants and specialty gas fill plants dedicated to fab customers. Specialty gases for advanced processes — high-purity rare gases (neon, krypton, xenon for excimer lasers and etch), ultra-high-purity silicon-based precursors, and exotic etch chemistries — are sourced from specialty suppliers including Resonac (formerly Showa Denko), Kanto Denka Kogyo, Central Glass, SK Materials, Versum / Merck, and others. Neon supply has been particularly constrained since the Russia-Ukraine conflict disrupted Ukrainian neon production, which had been a major global source for excimer laser gases. See Process Gases for the upstream view.

CMP Slurries & Pads

Chemical mechanical planarization (CMP) flattens the wafer between layers to maintain the optical and mechanical tolerances that subsequent lithography steps require. Each CMP pass consumes two consumables: a chemistry-specific slurry (silica, ceria, or alumina particles suspended in a reactive liquid) and a polyurethane polishing pad. Slurry chemistry is tuned per material layer — the slurry used to polish copper interconnect is chemically distinct from the one used to polish tungsten or oxide or low-k dielectric. A leading-edge chip with dozens of CMP passes consumes correspondingly dozens of different slurry formulations over its manufacturing cycle.

CMP slurry supply concentrates at four primary vendors: CMC Materials (formerly Cabot Microelectronics, now part of Entegris), Fujimi, Versum Materials (now part of Merck KGaA), and Fujifilm. Pads are supplied by Dow (the dominant pad vendor by market share), Cabot, Fujibo, and Rohm & Haas legacy lines. The CMP consumables market is projected to grow above its historical baseline as 3D NAND and advanced packaging drive new polishing requirements.

Sputtering Targets

Sputtering targets are the source material consumed by physical vapor deposition (PVD) tools. A sputtering tool fires ions at a solid metal or alloy target; atoms ejected from the target deposit on the wafer as a thin film. Targets are consumed as they erode and must be replaced on a regular schedule. Target compositions include pure metals (aluminum, copper, titanium, tantalum, tungsten, cobalt), alloys (TiN, TaN, CoFeB for magnetic layers), and specialty materials (indium tin oxide, ruthenium, molybdenum) for advanced interconnect and barrier applications.

Target supply concentrates at four primary vendors: JX Advanced Metals (formerly JX Nippon Mining & Metals), Materion, Honeywell Electronic Materials, and Plansee (for refractory and specialty targets). Target purity requirements are extreme — typically 99.9999% (6N) or better — and the supply chain reaches back to the raw material refining layer, including cobalt, tantalum, and ruthenium sourcing that has its own geopolitical concentration stories.

Consumption Rates & Fab Economics

Process consumables are a significant and recurring cost component of fab operations — second only to depreciation and energy. A leading-edge 300mm fab running at 100,000 WSPM consumes consumables at rates that are unintuitive at first encounter: photoresist by the tanker truck, specialty gases by the shipping container per month, sputtering targets replaced on weekly schedules. Unlike equipment (which is capital-amortized) and facilities (largely fixed), consumables scale linearly with wafer starts. A fab running at 80% capacity versus 100% capacity sees a roughly proportional reduction in consumables spending.

Consumable supply security is therefore a direct operational variable. Shortages — whether driven by geopolitical disruption (Japan-Korea photoresist tensions, Ukraine neon supply disruption), single-supplier events (natural disasters affecting a primary vendor site), or demand surges (AI-driven capacity expansion outrunning consumable ramp) — translate directly to reduced wafer starts and deferred production. Leading-edge fabs typically maintain dual-source qualification for every consumable where dual-sourcing is technically feasible, but advanced resist, specialty gases, and some sputtering targets are often single-qualified to a specific supplier for a specific process.

Supplier Concentration Across the Five Categories

The pattern across all five consumables is consistent: a small number of global suppliers, strong geographic concentration in Japan and the United States with selective European participation, and structural dependency on specific suppliers for the most advanced process generations.

Related Coverage

Parent: Fab & Assembly Hub

Peer sub-pillars: Fab Facilities · Fab Equipment · Manufacturing Flow

In-process children (at point of use): Photoresist · Photolithography · Wafer Cleaning · Deposition · Etching · Planarization (CMP)

Upstream supply-chain view (Materials & IP): Critical Chemicals · Process Gases · Raw Materials

Wafer substrate (separate from consumables): Wafer Specs & Sizes · Wafer Deliverables