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Stage 8 of 12Front-end manufacturing

Wafer processing

The repeated cycle that builds each layer.

What happens here?

Inside the fab, the wafer runs through the deposit → pattern → etch → dope → planarize cycle hundreds of times, layer by layer, to build the transistors and interconnect. Equipment and materials here are drawn from the individual process steps.

Who participates

  • Foundries
  • IDMs
  • Process engineers

Technologies involved

  • Photolithography
  • Thin-film deposition
  • Plasma etch
  • Ion implantation
  • Planarization (CMP)

Equipment required

  • Thermal oxidation / diffusion furnace
  • Rapid thermal processing (RTP) tools
  • CVD reactors
  • PVD sputtering tools
  • ALD reactors
  • Spin coater / track system
  • Hot plates
  • DUV scanner
  • EUV scanner
  • Mask aligner
  • Track (coat/develop)
  • Reactive-ion etch (RIE) tools
  • Deep-RIE / plasma etchers
  • Wet benches
  • Ion implanter
  • Rapid thermal anneal (RTA) tools
  • Diffusion furnace
  • CMP polisher
  • Post-CMP cleaning stations
  • CD-SEM
  • Optical scatterometry / ellipsometry
  • Defect-inspection scanners
  • Overlay metrology
  • Electroplating tools
  • PVD/CVD for barriers and seed
  • CMP polishers

Materials required

  • Oxygen
  • High-purity water
  • Silicon
  • Precursor gases
  • Sputter targets (e.g. Ti, Ta, Cu)
  • Dielectric sources
  • Photoresist polymer
  • Solvents
  • Adhesion promoter (e.g. HMDS)
  • Photomask / reticle
  • Developer
  • Pellicle
  • Etchant gases (e.g. fluorine/chlorine chemistries)
  • Wet etchants
  • Dopant source gases
  • Masking layers
  • Abrasive slurry
  • Polishing pads
  • Ultra-pure water
  • Reference / calibration wafers
  • Copper
  • Barrier metals (Ta/TaN)
  • Low-κ dielectrics

Skills required

  • Litho / etch / deposition process engineering
  • Plasma physics
  • Process chemistry

Research happening

  • Gate-all-around transistors
  • Advanced patterning
  • New interconnect metals

Companies operating here

From Semitree's directory (a curated sample) — types: Foundry, IDM, Semiconductor equipment.

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These dimensions are architected for this stage. Only data derived from verified sources is shown — no speculative figures.

  • Companies· available
  • Geographic concentration· planned
  • Supply-chain risk· planned
  • Capacity· planned
  • Investments· planned
  • Technology dependencies· planned