Invention Grant
- Patent Title: High surface dopant concentration formation processes and structures formed thereby
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Application No.: US16889356Application Date: 2020-06-01
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Publication No.: US11257906B2Publication Date: 2022-02-22
- Inventor: Chia-Cheng Chen , Liang-Yin Chen
- 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: H01L29/08
- IPC: H01L29/08 ; H01L29/36 ; H01L29/417 ; H01L29/165 ; H01L29/78 ; H01L21/02 ; H01L21/223 ; H01L21/324 ; H01L29/45 ; H01L29/66

Abstract:
Embodiments disclosed herein relate generally to forming a source/drain region with a high surface dopant concentration at an upper surface of the source/drain region, to which a conductive feature may be formed. In an embodiment, a structure includes an active area on a substrate, a dielectric layer over the active area, and a conductive feature through the dielectric layer to the active area. The active area includes a source/drain region. The source/drain region includes a surface dopant region at an upper surface of the source/drain region, and includes a remainder portion of the source/drain region having a source/drain dopant concentration. The surface dopant region includes a peak dopant concentration proximate the upper surface of the source/drain region. The peak dopant concentration is at least an order of magnitude greater than the source/drain dopant concentration. The conductive feature contacts the source/drain region at the upper surface of the source/drain region.
Public/Granted literature
- US20200295135A1 High Surface Dopant Concentration Formation Processes and Structures Formed Thereby Public/Granted day:2020-09-17
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