Invention Grant
- Patent Title: Replacement gate MOSFET with self-aligned diffusion contact
- Patent Title (中): 具有自对准扩散接触的替代栅极MOSFET
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Application No.: US12795973Application Date: 2010-06-08
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Publication No.: US08421077B2Publication Date: 2013-04-16
- Inventor: Sameer H. Jain , Carl J. Radens , Shahab Siddiqui , Jay W. Strane
- Applicant: Sameer H. Jain , Carl J. Radens , Shahab Siddiqui , Jay W. Strane
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Scully, Scott, Murphy & Presser, P.C.
- Agent H. Daniel Schnurmann
- Main IPC: H01L29/10
- IPC: H01L29/10

Abstract:
A replacement gate field effect transistor includes at least one self-aligned contact that overlies a portion of a dielectric gate cap. A replacement gate stack is formed in a cavity formed by removal of a disposable gate stack. The replacement gate stack is subsequently recessed, and a dielectric gate cap having sidewalls that are vertically coincident with outer sidewalls of the gate spacer is formed by filling the recess over the replacement gate stack. An anisotropic etch removes the dielectric material of the planarization layer selective to the material of the dielectric gate cap, thereby forming at least one via cavity having sidewalls that coincide with a portion of the sidewalls of the gate spacer. A portion of each diffusion contact formed by filling the at least one via cavity overlies a portion of the gate spacer and protrudes into the dielectric gate cap.
Public/Granted literature
- US20110298017A1 REPLACEMENT GATE MOSFET WITH SELF-ALIGNED DIFFUSION CONTACT Public/Granted day:2011-12-08
Information query
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