Invention Grant
- Patent Title: Partial self-aligned contact for MOL
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Application No.: US17553950Application Date: 2021-12-17
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Publication No.: US11887890B2Publication Date: 2024-01-30
- Inventor: Ruilong Xie , Veeraraghavan Basker , Alexander Reznicek , Junli Wang
- 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
- Agent Stosch Sabo
- The original application number of the division: US16669231 2019.10.30
- Main IPC: H01L21/28
- IPC: H01L21/28 ; H01L29/423 ; H01L29/66 ; H01L29/417 ; H01L21/768 ; H01L29/78 ; H01L21/311

Abstract:
Partial self-aligned contact structures are provided. In one aspect, a method of forming a semiconductor device includes: patterning fins in a substrate; forming a gate(s) over the fins, separated from source/drains by first spacers, wherein a lower portion of the gate(s) includes a workfunction-setting metal, and an upper portion of the gate(s) includes a core metal between a metal liner; recessing the metal liner to form divots in the upper portion of the gate(s) in between the first spacers and the core metal; forming second spacers in the divots such that the first spacers and the second spacers surround the core metal in the upper portion of the gate(s); forming lower source/drain contacts in between the first spacers over the source/drains; recessing the lower source/drain contacts to form gaps over the lower source/drain contacts; and forming source/drain caps in the gaps. A semiconductor device is also provided.
Public/Granted literature
- US20220108923A1 Partial Self-Aligned Contact for MOL Public/Granted day:2022-04-07
Information query
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