Invention Application
- Patent Title: Self-Aligned Contacts for MOL
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Application No.: US16578300Application Date: 2019-09-21
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Publication No.: US20210090950A1Publication Date: 2021-03-25
- Inventor: Su Chen Fan , Adra Carr , Ruilong Xie , Kangguo Cheng
- Applicant: International Business Machines Corporation
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Main IPC: H01L21/768
- IPC: H01L21/768 ; H01L23/522 ; H01L23/532

Abstract:
MOL non-SAC structures and techniques for formation thereof are provided. In one aspect, a method of forming a semiconductor device includes: patterning fins in a substrate; forming gates over the fins and source/drains offset by gate spacers; lining upper sidewalls of the gates with a first dielectric liner; depositing a source/drain metal; lining upper sidewalls of the source/drain metal with a second dielectric liner; depositing a dielectric over the gates and source/drains; forming a first via in the dielectric which exposes the second dielectric liner over a select source/drain; removing the second dielectric liner from the select source/drain; forming a second via in the dielectric which exposes the first dielectric liner over a select gate; removing the first dielectric liner from the select gate; forming a source/drain contact in the first via; and forming a gate contact in the second via. A semiconductor device is also provided.
Public/Granted literature
- US11205590B2 Self-aligned contacts for MOL Public/Granted day:2021-12-21
Information query
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