- Patent Title: Integration scheme for gate height control and void free RMG fill
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Application No.: US16038977Application Date: 2018-07-18
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Publication No.: US10354928B2Publication Date: 2019-07-16
- Inventor: Suraj Kumar Patil , Katsunori Onishi , Pei Liu , Chih-Chiang Chang
- Applicant: GLOBALFOUNDRIES Inc.
- Applicant Address: KY Grand Cayman
- Assignee: GLOBALFOUNDRIES INC.
- Current Assignee: GLOBALFOUNDRIES INC.
- Current Assignee Address: KY Grand Cayman
- Agency: Ditthavong & Steiner P.C.
- Main IPC: H01L21/82
- IPC: H01L21/82 ; H01L21/8238 ; H01L21/28 ; H01L27/092 ; H01L29/49

Abstract:
A method of controlling NFET and PFET gate heights across different gate widths with chamfering and the resulting device are provided. Embodiments include forming an ILD over a fin; forming cavities in the ILD, each with similar or different widths; forming a high-K dielectric layer over the ILD and in each cavity; forming a pWF metal layer over the dielectric layer in one cavity; recessing the pWF metal layer to a height above the fin; forming an nWF metal layer in the cavities over the dielectric and pWF metal layers; recessing the nWF metal layer to a height above the pWF metal layer; forming a barrier layer over the dielectric and nWF metal layers; filling the cavities with a low-resistive metal; and recessing the barrier and dielectric layers to a height above the nWF metal layer; and concurrently etching the low-resistive metal.
Public/Granted literature
- US20180323113A1 INTEGRATION SCHEME FOR GATE HEIGHT CONTROL AND VOID FREE RMG FILL Public/Granted day:2018-11-08
Information query
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