Invention Grant
- Patent Title: Field effect device with reduced capacitance and resistance in source/drain contacts at reduced gate pitch
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Application No.: US15493867Application Date: 2017-04-21
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Publication No.: US10381267B2Publication Date: 2019-08-13
- Inventor: Kangguo Cheng , Chi-Chun Liu , Peng Xu
- 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: Tutunjian & Bitetto, P.C.
- Agent Vazken Alexanian
- Main IPC: H01L21/76
- IPC: H01L21/76 ; H01L21/768 ; H01L23/532 ; H01L23/535 ; H01L29/417

Abstract:
A method of forming source/drain contacts with reduced capacitance and resistance, including, forming a source/drain and a channel region on an active region of a substrate, forming a dielectric fill on the source/drain, forming a trench in the dielectric fill, forming a source/drain contact in the trench, forming an inner contact mask section on a portion of an exposed top surface of the source/drain contact, removing a portion of the source/drain contact to form a channel between a sidewall of the dielectric fill and a remaining portion of the source/drain contact, where a surface area of the remaining portion of the source/drain contact is greater than the surface area of the exposed top surface of the source/drain contact, and forming a source/drain electrode fill on the remaining portion of the source/drain contact.
Public/Granted literature
Information query
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