Invention Grant
- Patent Title: Self-aligned contact on a semiconductor device
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Application No.: US16183787Application Date: 2018-11-08
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Publication No.: US11062946B2Publication Date: 2021-07-13
- Inventor: Ashim Dutta , Jennifer Church , Ekmini A. de Silva , Luciana M. Thompson
- 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
- Agency: Cantor Colburn LLP
- Agent Randall Bluestone
- Main IPC: H01L21/768
- IPC: H01L21/768 ; H01L21/311 ; H01L29/78 ; H01L29/66 ; H01L21/321

Abstract:
A method for forming one or more self-aligned contacts on a semiconductor device includes applying a protective layer on an oxide surface above a source and drain of the semiconductor device. The protective layer covers a top surface of the oxide surface selective to nitride above a gate contact pillar. A sacrificial layer is applied to the nitride surface. The sacrificial layer is deposited only on the nitride surface that is selective to the oxide layer coated with the protective layer. The protective layer is removed from the oxide surface and source/drain contact holes are etched in the oxide surface to form self-aligned contacts on the semiconductor device.
Public/Granted literature
- US20200152514A1 SELF-ALIGNED CONTACT ON A SEMICONDUCTOR DEVICE Public/Granted day:2020-05-14
Information query
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