Invention Grant
- Patent Title: Patterned photoresist removal
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Application No.: US14714887Application Date: 2015-05-18
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Publication No.: US09772559B2Publication Date: 2017-09-26
- Inventor: Ya-Ling Cheng , Ching-Yu Chang , Chien-Chih Chen
- Applicant: Taiwan Semiconductor Manufacturing Company, Ltd.
- Applicant Address: TW Hsin-Chu
- Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
- Current Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
- Current Assignee Address: TW Hsin-Chu
- Agency: Haynes and Boone, LLP
- Main IPC: G03F7/38
- IPC: G03F7/38 ; G03F7/42 ; G03F7/038 ; G03F7/40

Abstract:
Methods for performing a photolithographic process are disclosed. The methods facilitate the removal of photosensitive from a wafer after the photosensitive has been used as an etch mask. The photosensitive may be a negative tone photosensitive that undergoes a cross-linking process on exposure to electromagnetic energy. By limiting the cross-linking through a reduced post-exposure bake temperature and/or through reduced cross-linker loading, the photoresist, or at least a portion thereof, may have a reduced solvent strip resistance. Because of the reduced solvent strip resistance, a portion of the photosensitive may be removed using a solvent strip. After the solvent strip, a dry etch may be performed to remove remaining portions of the photoresist.
Public/Granted literature
- US20160342092A1 Patterned Photoresist Removal Public/Granted day:2016-11-24
Information query
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