Invention Grant
- Patent Title: Selective tungsten removal
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Application No.: US15835731Application Date: 2017-12-08
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Publication No.: US10256112B1Publication Date: 2019-04-09
- Inventor: Xikun Wang , Nitin Ingle
- 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: H01L21/321
- IPC: H01L21/321 ; H01L21/3213 ; C23C28/04 ; C23C16/01 ; H01L21/02 ; H01L21/3065 ; H01L21/768 ; H01L21/285

Abstract:
Exemplary methods for removing tungsten-containing material may include flowing a chlorine-containing precursor into a processing region of a semiconductor processing chamber. The methods may also include flowing methane into the processing region of the semiconductor processing chamber. The methods may include forming a plasma from the chlorine-containing precursor and the methane to produce plasma effluents. The methods may also include contacting a substrate with the plasma effluents. The substrate may include an exposed region of a tungsten-containing material. The plasma effluents may produce an oxychloride of tungsten. The methods may also include recessing the exposed region of the tungsten-containing material.
Information query
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