Invention Grant
- Patent Title: Source/drain isolation structure and methods thereof
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Application No.: US17649503Application Date: 2022-01-31
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Publication No.: US11694921B2Publication Date: 2023-07-04
- Inventor: Lin-Yu Huang , Sheng-Tsung Wang , Chia-Hao Chang , Tien-Lu Lin , Yu-Ming Lin , Chih-Hao Wang
- 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: Haynes and Boone, LLP
- Main IPC: H01L21/763
- IPC: H01L21/763 ; H01L21/311 ; H01L27/088 ; H01L21/762

Abstract:
A method and structure directed to providing a source/drain isolation structure includes providing a device having a first source/drain region adjacent to a second source/drain region. A masking layer is deposited between the first and second source/drain regions and over an exposed first part of the second source/drain region. After depositing the masking layer, a first portion of an ILD layer disposed on either side of the masking layer is etched, without substantial etching of the masking layer, to expose a second part of the second source/drain region and to expose the first source/drain region. After etching the first portion of the ILD layer, the masking layer is etched to form an L-shaped masking layer. After forming the L-shaped masking layer, a first metal layer is formed over the exposed first source/drain region and a second metal layer is formed over the exposed second part of the second source/drain region.
Public/Granted literature
- US20220157649A1 SOURCE/DRAIN ISOLATION STRUCTURE AND METHODS THEREOF Public/Granted day:2022-05-19
Information query
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