Invention Grant
- Patent Title: Method for lithographically forming wafer identification marks and alignment marks
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Application No.: US16114567Application Date: 2018-08-28
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Publication No.: US10283457B2Publication Date: 2019-05-07
- Inventor: Hu-Wei Lin , Chih-Hsien Hsu , Yu-Wei Chiu , Hai-Yin Chen , Ying-Hao Wang , Yu-Hen Wu
- Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.
- Applicant Address: TW Hsin-Chu
- Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee Address: TW Hsin-Chu
- Agency: Eschweiler & Potashnik, LLC
- Main IPC: H01L23/544
- IPC: H01L23/544 ; G03F7/20 ; H01L21/027 ; H01L21/308 ; H01L21/67

Abstract:
The present disclosure relates a method of forming substrate identification marks. In some embodiments, the method may be performed by forming a photosensitive material over a substrate. A first type of electromagnetic radiation is selectively provided to the photosensitive material to expose a plurality of substrate identification marks within the photosensitive material, and a second type of electromagnetic radiation is selectively provided to the photosensitive material to expose one or more alignment marks within the photosensitive material. Exposed portions of the photosensitive material are removed to form a patterned photosensitive material. The substrate is etched according to the patterned photosensitive material to form recesses within the substrate that are defined by the plurality of substrate identification marks and the one or more alignment marks.
Public/Granted literature
- US20180366415A1 LITHOGRAPHY ENGRAVING MACHINE FOR FORMING WAFER IDENTIFICATION MARKS AND ALIGNMENT MARKS Public/Granted day:2018-12-20
Information query
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