Invention Grant
- Patent Title: Vertical field effect transistor with uniform gate length
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Application No.: US15220972Application Date: 2016-07-27
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Publication No.: US09935101B2Publication Date: 2018-04-03
- Inventor: Kangguo Cheng , Xin Miao , Wenyu Xu , Chen Zhang
- 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: Ryan, Mason & Lewis, LLP
- Agent Vazken Alexanian
- Main IPC: H01L21/8236
- IPC: H01L21/8236 ; H01L27/088 ; H01L21/8234 ; H01L21/308 ; H01L21/285 ; H01L21/3213 ; H01L29/78 ; H01L29/06

Abstract:
Fabrication of a semiconductor structure includes forming a set of two or more fins on a source/drain region formed on a substrate. A first mask layer and a second mask layer are formed on each fin. A spacer layer is formed on the source/drain region and between each fin, and a dielectric layer is formed on the spacer layer and along an exterior of each fin. A plurality of gate metal portions is created each having a thickness about equal to a target thickness. The first mask layer and an exposed portion of the dielectric layer are removed from each fin. An interlayer dielectric is deposited on the semiconductor structure. Portions of the interlayer dielectric and the gate metal are removed to a top of the second mask layer. The gate metal portions are each recessed to substantially the same depth.
Public/Granted literature
- US20180033788A1 VERTICAL FIELD EFFECT TRANSISTOR WITH UNIFORM GATE LENGTH Public/Granted day:2018-02-01
Information query
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