Invention Grant
- Patent Title: CMP-friendly coatings for planar recessing or removing of variable-height layers
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Application No.: US15686922Application Date: 2017-08-25
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Publication No.: US11011385B2Publication Date: 2021-05-18
- Inventor: Wen-Kuei Liu , Teng-Chun Tsai , Kuo-Yin Lin , Shen-Nan Lee , Yu-Wei Chou , Kuo-Cheng Lien , Chang-Sheng Lin , Chih-Chang Hung , Yung-Cheng Lu
- 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: H01L21/3105
- IPC: H01L21/3105 ; H01L21/84 ; H01L21/28 ; H01L21/3213 ; H01L21/027 ; H01L21/311 ; H01L21/8238 ; H01L29/66

Abstract:
A method of manufacturing an integrated circuit device is provided. A first feature, which has a first susceptibility to damage by chemical mechanical processing (CMP), is formed at a first height as measured from an upper surface of the substrate. A second feature, which has a second susceptibility to damage by the CMP, is formed at a second height as measured from the upper surface of the substrate and is laterally spaced from the first feature by a recess. The second height is greater than the first height, and the second susceptibility is less than the first susceptibility. A sacrificial coating is formed in the recess over an uppermost surface of the first feature. CMP is performed to remove a first portion of the sacrificial coating and expose an upper surface of the second feature while leaving a second portion of the sacrificial coating in place over the first feature.
Public/Granted literature
- US20170352548A1 CMP-FRIENDLY COATINGS FOR PLANAR RECESSING OR REMOVING OF VARIABLE-HEIGHT LAYERS Public/Granted day:2017-12-07
Information query
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