Invention Grant
- Patent Title: Metal hardmask all in one integrated etch
- Patent Title (中): 金属硬掩模全部集成在一起
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Application No.: US14398101Application Date: 2012-05-02
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Publication No.: US09349606B2Publication Date: 2016-05-24
- Inventor: Yu Cheng , Junwen Huang , Huiyuan Pei , Jiangang Liu , Youngjin Choi , Liang Wang
- Applicant: Yu Cheng , Junwen Huang , Huiyuan Pei , Jiangang Liu , Youngjin Choi , Liang Wang
- Applicant Address: US CA Fremont
- Assignee: Lam Research Corporation
- Current Assignee: Lam Research Corporation
- Current Assignee Address: US CA Fremont
- Agency: Beyer Law Group LLP
- International Application: PCT/CN2012/074976 WO 20120502
- International Announcement: WO2013/163796 WO 20131107
- Main IPC: H01L21/311
- IPC: H01L21/311 ; H01L21/768

Abstract:
A method for forming conductive contacts in a dielectric layer is provided. Partial vias are etched into the dielectric layer through a via mask. Trenches are etched into the dielectric layer through a trench mask, wherein the etching the trenches completes and over etches the vias to widen bottoms of the vias. Tops of the trenches or vias are rounded.
Public/Granted literature
- US20150179472A1 METAL HARDMASK ALL IN ONE INTEGRATED ETCH Public/Granted day:2015-06-25
Information query
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