Invention Grant
- Patent Title: VFET bottom epitaxy formed with anchors
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Application No.: US15865902Application Date: 2018-01-09
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Publication No.: US10374060B2Publication Date: 2019-08-06
- Inventor: Chen Zhang , Tenko Yamashita
- 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 Vazken Alexanian
- Main IPC: H01L29/06
- IPC: H01L29/06 ; H01L29/08 ; H01L29/66 ; H01L29/78 ; H01L21/3065 ; H01L21/308 ; H01L21/225 ; H01L29/51 ; H01L29/786

Abstract:
Techniques for forming VFET bottom source and drain epitaxy with anchors are provided. In one aspect, a method of forming a VFET device includes: patterning at least one fin in a substrate; forming anchors on opposite ends of the at least one fin; laterally etching a base of the at least one fin, wherein the anchors prevent the lateral etching from being performed on the ends of the at least one fin; forming bottom source and drains at the base of the at least one fin between the anchors; removing the anchors; forming bottom spacers on the bottom source and drains; forming gates above the bottom spacers alongside the at least one fin; forming top spacers above the gates; and forming top source and drains above the top spacers at a top of the at least one fin. VFET devices are also provided.
Public/Granted literature
- US20190214483A1 VFET Bottom Epitaxy Formed with Anchors Public/Granted day:2019-07-11
Information query
IPC分类: