Invention Grant
- Patent Title: Scalable device for FINFET technology
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Application No.: US17501924Application Date: 2021-10-14
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Publication No.: US11631617B2Publication Date: 2023-04-18
- Inventor: Ruilong Xie , Kangguo Cheng , Juntao Li , Chanro Park
- 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: Michael J. Chang, LLC
- Agent Robert Sullivan
- Main IPC: H01L21/8238
- IPC: H01L21/8238 ; H01L29/417 ; H01L27/092 ; H01L29/78 ; H01L21/3105 ; H01L29/66

Abstract:
Scalable device designs for FINFET technology are provided. In one aspect, a method of forming a FINFET device includes: patterning fins in a substrate which include a first fin(s) corresponding to a first FINFET device and a second fin(s) corresponding to a second FINFET device; depositing a conformal gate dielectric over the fins; depositing a conformal sacrificial layer over the gate dielectric; depositing a sacrificial gate material over the sacrificial layer; replacing the sacrificial layer with a first workfunction-setting metal(s) over the first fin(s) and a second workfunction-setting metal(s) over the second fin(s); removing the sacrificial gate material; forming dielectric gates over the first workfunction-setting metal(s), the second workfunction-setting metal(s) and the gate dielectric forming gate stacks; and forming source and drains in the fins between the gate stacks, wherein the source and drains are separated from the gate stacks by inner spacers. A FINFET device is also provided.
Public/Granted literature
- US20220037212A1 Scalable Device for FINFET Technology Public/Granted day:2022-02-03
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