Invention Grant
- Patent Title: Methods for forming recesses in source/drain regions and devices formed thereof
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Application No.: US16927294Application Date: 2020-07-13
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Publication No.: US11417740B2Publication Date: 2022-08-16
- Inventor: Yu-Lien Huang
- Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.
- Applicant Address: TW Hsinchu
- Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee Address: TW Hsinchu
- Agency: Slater Matsil, LLP
- Main IPC: H01L29/417
- IPC: H01L29/417 ; H01L21/311 ; H01L21/306 ; H01L21/768 ; H01L29/40 ; H01L29/08 ; H01L29/66 ; H01L29/78 ; H01L21/3065 ; H01L21/8234 ; H01L29/45 ; H01L29/04 ; H01L29/49 ; H01L29/165 ; H01L29/51 ; H01L21/02 ; H01L21/285 ; H01L29/10

Abstract:
Embodiments disclosed herein relate generally to methods for forming recesses in epitaxial source/drain regions for forming conductive features. In some embodiments, the recesses are formed in a two-step etching process including an anisotropic etch to form a vertical opening and an isotropic etch to expand an end portion of the vertical opening laterally and vertically. The recesses can have increased contact area between the source/drain region and the conductive feature, and can enable reduced resistance therebetween.
Public/Granted literature
- US20200343351A1 Methods for Forming Recesses in Source/Drain Regions and Devices Formed Thereof Public/Granted day:2020-10-29
Information query
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