- 专利标题: Methods and Apparatus for MOS Capacitors in Replacement Gate Process
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申请号: US15231215申请日: 2016-08-08
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公开(公告)号: US20160351451A1公开(公告)日: 2016-12-01
- 发明人: Pai-Chieh Wang , Tung-Heng Hsieh , Yimin Huang , Chung-Hui Chen
- 申请人: Taiwan Semiconductor Manufacturing Company, Ltd.
- 主分类号: H01L21/822
- IPC分类号: H01L21/822 ; H01L29/40 ; H01L27/06
摘要:
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.
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