Invention Grant
- Patent Title: Method for fabricating a metal high-k gate stack for a buried recessed access device
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Application No.: US14643401Application Date: 2015-03-10
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Publication No.: US09337042B2Publication Date: 2016-05-10
- Inventor: Satoru Mayuzumi , Mark Fischer , Michael Violette
- Applicant: Sony Corporation
- Applicant Address: JP Tokyo
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: JP Tokyo
- Agency: Sheridan Ross P.C.
- Main IPC: H01L21/336
- IPC: H01L21/336 ; H01L21/28 ; H01L29/66 ; H01L29/423 ; H01L21/265 ; H01L27/108 ; H01L21/283 ; H01L29/78

Abstract:
A method for fabricated a buried recessed access device comprising etching a plurality of gate trenches in a substrate, implanting and activating a source/drain region in the substrate, depositing a dummy gate in each of the plurality of gate trenches, filling the plurality of gate trenches with an oxide layer, removing each dummy gate and depositing a high-K dielectric in the plurality of gate trenches, depositing a metal gate on the high-K dielectric in each of the plurality of gate trenches, depositing a second oxide layer on the metal gate and forming a contact on the source/drain.
Public/Granted literature
- US20150187586A1 METHOD FOR FABRICATING A METAL HIGH-K GATE STACK FOR A BURIED RECESSED ACCESS DEVICE Public/Granted day:2015-07-02
Information query
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