Invention Grant
- Patent Title: Contact features of semiconductor devices
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Application No.: US17872942Application Date: 2022-07-25
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Publication No.: US11935786B2Publication Date: 2024-03-19
- Inventor: Tsui-Ling Yen , Chien-Hung Chen
- Applicant: Taiwan Semiconductor Manufacturing Company Limited
- Applicant Address: TW Hsinchu
- Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
- Current Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
- Current Assignee Address: TW Hsinchu
- Agency: Foley & Lardner LLP
- The original application number of the division: US17192600 2021.03.04
- Main IPC: H01L21/768
- IPC: H01L21/768 ; H01L21/02 ; H01L23/522 ; H01L29/40 ; H01L29/417

Abstract:
A method of fabricating a semiconductor device includes recessing an upper portion of a first dielectric layer disposed over a conductive feature. The method includes filling the recessed upper portion with a second dielectric layer to form a void embedded in the second dielectric layer. The method includes etching the second dielectric layer and the first dielectric layer to form a contact opening that exposes at least a portion of the conductive feature using the void to vertically align at least a lower portion of the contact opening with the conductive feature. The method includes filling the contact opening with a conductive material to form a contact feature electrically coupled to the conductive feature.
Public/Granted literature
- US20220359288A1 CONTACT FEATURES OF SEMICONDUCTOR DEVICES Public/Granted day:2022-11-10
Information query
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