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Which step in semiconductor fabrication involves transferring circuit patterns onto silicon wafers?
- Etching
- Photolithography
- Deposition
- Doping
Answer: Photolithography
Photolithography uses light to transfer mask patterns onto photoresist-coated wafers, defining circuit features. Critical for miniaturization; EUV lithography enables sub-7nm nodes. Other steps: deposition (add layers), etching (remove material), doping (modify conductivity). Critical for chip manufacturing questions.