- 专利标题: Forming self-aligned gate and source/drain contacts using sacrificial gate cap spacer and resulting devices
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申请号: US16101876申请日: 2018-08-13
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公开(公告)号: US10529826B1公开(公告)日: 2020-01-07
- 发明人: Julien Frougier , Ruilong Xie , Chanro Park , Kangguo Cheng
- 申请人: GLOBALFOUNDRIES Inc.
- 申请人地址: KY Grand Cayman
- 专利权人: GLOBALFOUNDRIES Inc.
- 当前专利权人: GLOBALFOUNDRIES Inc.
- 当前专利权人地址: KY Grand Cayman
- 代理机构: Amerson Law Firm, PLLC
- 主分类号: H01L29/66
- IPC分类号: H01L29/66 ; H01L21/764 ; H01L21/768 ; H01L29/417 ; H01L29/423
摘要:
A method includes forming an active layer, forming a gate structure above a channel region of the active layer, forming a sidewall spacer adjacent the gate structure, forming a first dielectric layer adjacent the sidewall spacer, recessing the gate structure to define a gate cavity, forming an inner spacer in the gate cavity, forming a cap layer in the gate cavity, recessing the first dielectric layer and the sidewall spacer to expose sidewall surfaces of the cap layer, removing the inner spacer to define a first spacer cavity, forming an upper spacer in the spacer cavity and contacting sidewall surfaces of the cap layer, forming a second dielectric layer above the upper spacer and the cap layer, and forming a first contact structure at least partially embedded in the second dielectric layer and contacting a surface of the upper spacer.
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