Invention Grant
- Patent Title: Selective cobalt removal for bottom up gapfill
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Application No.: US16229710Application Date: 2018-12-21
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Publication No.: US10770346B2Publication Date: 2020-09-08
- Inventor: Xikun Wang , Jianxin Lei , Nitin Ingle , Roey Shaviv
- Applicant: Applied Materials, Inc.
- Applicant Address: US CA Santa Clara
- Assignee: Applied Materials, Inc.
- Current Assignee: Applied Materials, Inc.
- Current Assignee Address: US CA Santa Clara
- Agency: Kilpatrick Townsend & Stockton LLP
- Main IPC: H01L21/302
- IPC: H01L21/302 ; H01L21/461 ; H01L21/4763 ; H01L21/285 ; H01L21/3213 ; H01L21/768 ; H01L21/67 ; H01L23/532 ; H01L21/321

Abstract:
Exemplary methods for removing cobalt material may include flowing a chlorine-containing precursor into a processing region of a semiconductor processing chamber. The methods may include forming a plasma of the chlorine-containing precursor to produce plasma effluents. The methods may also include contacting an exposed region of cobalt with the plasma effluents. The exposed region of cobalt may include an overhang of cobalt on a trench defined on a substrate. The plasma effluents may produce cobalt chloride at the overhang of cobalt. The methods may include flowing a nitrogen-containing precursor into the processing region of the semiconductor processing chamber. The methods may further include contacting the cobalt chloride with the nitrogen-containing precursor. The methods may also include recessing the overhang of cobalt.
Public/Granted literature
- US20190122923A1 SELECTIVE COBALT REMOVAL FOR BOTTOM UP GAPFILL Public/Granted day:2019-04-25
Information query
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