Wolfspeed Interview Question
Walk me through the lithography process
Interview Answer
Anonymous
Mar 5, 2012
Here is a simplified version of the photolithography process. 1. Clean/prepare wafer 2. Apply photoresist 3. Align photomask 4. Expose to UV light 5. Remove photoresist that was exposed to UV light 6. Etch exposed wafer oxide 7. Remove remaining photoresist
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