Invention Grant
- Patent Title: Self-aligned contact for replacement gate devices
- Patent Title (中): 更换门装置的自对准触点
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Application No.: US13780912Application Date: 2013-02-28
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Publication No.: US09214541B2Publication Date: 2015-12-15
- Inventor: Ravikumar Ramachandran , Ying Li , Richard S. Wise
- Applicant: GLOBALFOUNDRIES INC.
- Applicant Address: KY Grand Cayman
- Assignee: GLOBALFOUNDRIES INC.
- Current Assignee: GLOBALFOUNDRIES INC.
- Current Assignee Address: KY Grand Cayman
- Agency: Scully, Scott, Murphy & Presser, P.C.
- Main IPC: H01L21/00
- IPC: H01L21/00 ; H01L29/78 ; H01L21/768 ; H01L29/66 ; H01L21/8238 ; H01L29/49 ; H01L29/51

Abstract:
A conductive top surface of a replacement gate stack is recessed relative to a top surface of a planarization dielectric layer by at least one etch. A dielectric capping layer is deposited over the planarization dielectric layer and the top surface of the replacement gate stack so that the top surface of a portion of the dielectric capping layer over the replacement gate stack is vertically recessed relative to another portion of the dielectric layer above the planarization dielectric layer. The vertical offset of the dielectric capping layer can be employed in conjunction with selective via etch processes to form a self-aligned contact structure.
Public/Granted literature
- US20130175587A1 SELF-ALIGNED CONTACT FOR REPLACEMENT GATE DEVICES Public/Granted day:2013-07-11
Information query
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