Invention Application
- Patent Title: SELF-ALIGNED CONTACT PROTECTION USING REINFORCED GATE CAP AND SPACER PORTIONS
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Application No.: US15345137Application Date: 2016-11-07
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Publication No.: US20180130889A1Publication Date: 2018-05-10
- Inventor: Ruilong XIE , Min Gyu SUNG , Hoon KIM , Chanro PARK
- Applicant: GLOBALFOUNDRIES Inc.
- Applicant Address: KY Grand Cayman
- Assignee: GLOBALFOUNDRIES Inc.
- Current Assignee: GLOBALFOUNDRIES Inc.
- Current Assignee Address: KY Grand Cayman
- Main IPC: H01L29/417
- IPC: H01L29/417 ; H01L21/8234 ; H01L21/3205 ; H01L29/45 ; H01L21/3105 ; H01L27/088 ; H01L29/66

Abstract:
A method includes providing a starting structure, the starting structure including a semiconductor substrate, sources and drains, a hard mask liner layer over the sources and drains, a bottom dielectric layer over the hard mask liner layer, metal gates between the sources and drains, the metal gates defined by spacers, gate cap openings between corresponding spacers and above the metal gates, and a top dielectric layer above the bottom dielectric layer and in the gate cap openings, resulting in gate caps. The method further includes removing portions of the top dielectric layer, the removing resulting in contact openings and divot(s) at a top portion of the spacers and/or gate caps, and filling the divot(s) with etch-stop material, the etch-stop material having an etch-stop ability better than a material of the spacers and gate cap. A resulting semiconductor structure is also disclosed.
Public/Granted literature
- US10002932B2 Self-aligned contact protection using reinforced gate cap and spacer portions Public/Granted day:2018-06-19
Information query
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