Invention Grant
- Patent Title: Wafer table chuck having a particle recess
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Application No.: US15687908Application Date: 2017-08-28
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Publication No.: US10310390B2Publication Date: 2019-06-04
- Inventor: Yung-Hsiang Chen , Chung-Yi Ho , David Zhou
- 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
- Priority: CN201710680417 20170810
- Main IPC: G03F7/20
- IPC: G03F7/20 ; G03F1/42 ; G03F9/00 ; G03F7/26 ; G03F7/16

Abstract:
An apparatus for a chuck having particle recesses is provided. In some embodiments, the chuck includes a plurality of impressions and a particle recess. The impressions of the plurality of impressions are laterally spaced and extend into the chuck from a top surface of the chuck to a base surface of the chuck. The base surface of the chuck defines bottom surfaces respectively of the impressions and is spaced between the top surface of the chuck and a bottom surface of the chuck. The particle recess extends in to the chuck from the top surface of the chuck to a location spaced between the base surface of the chuck and the bottom surface of the chuck. In particular, the particle recess is configured to underlie a workpiece alignment mark of a workpiece.
Public/Granted literature
- US20190049849A1 WAFER TABLE CHUCK HAVING A PARTICLE RECESS Public/Granted day:2019-02-14
Information query
IPC分类: