Invention Grant
- Patent Title: Methods and apparatus for MOS capacitors in replacement gate process
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Application No.: US16512041Application Date: 2019-07-15
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Publication No.: US10720361B2Publication Date: 2020-07-21
- Inventor: Pai-Chieh Wang , Tung-Heng Hsieh , Yimin Huang , Chung-Hui Chen
- Applicant: Taiwan Semiconductor Manufacturing Company, Ltd.
- Applicant Address: TW Hsin-Chu
- Assignee: Taiwan Semiconductor Manufacturing Company
- Current Assignee: Taiwan Semiconductor Manufacturing Company
- Current Assignee Address: TW Hsin-Chu
- Agency: Slater Matsil, LLP
- Main IPC: H01L27/07
- IPC: H01L27/07 ; H01L21/822 ; H01L21/8234 ; H01L27/06 ; H01L27/08 ; H01L49/02 ; H01L29/94 ; H01L29/40

Abstract:
Methods and apparatus for polysilicon MOS capacitors in a replacement gate process. A method includes disposing a gate dielectric layer over a semiconductor substrate; disposing a polysilicon gate layer over the dielectric layer; patterning the gate dielectric layer and the polysilicon gate layer to form a plurality of polysilicon gates spaced by at least a minimum polysilicon to polysilicon pitch; defining a polysilicon resistor region containing at least one of the polysilicon gates and not containing at least one other of the polysilicon gates, which form dummy gates; depositing a mask layer over an inter-level dielectric layer; patterning the mask layer to expose the dummy gates; removing the dummy gates and the gate dielectric layer underneath the dummy gates to leave trenches in the inter-level dielectric layer; and forming high-k metal gate devices in the trenches in the inter-level dielectric layer. An apparatus produced by the method is disclosed.
Public/Granted literature
- US20190341310A1 Methods and Apparatus for MOS Capacitors in Replacement Gate Process Public/Granted day:2019-11-07
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