Invention Grant
- Patent Title: Edge ring for bevel polymer reduction
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Application No.: US14690121Application Date: 2015-04-17
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Publication No.: US10903055B2Publication Date: 2021-01-26
- Inventor: Rohit Mishra , Graeme Jamieson Scott , Khalid Mohiuddin Sirajuddin , Sheshraj L. Yulshibagwale , Sriskantharajah Thirunavukarasu
- 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: Patterson + Sheridan, LLP
- Main IPC: H01J37/32
- IPC: H01J37/32 ; H01L21/687

Abstract:
Embodiments of the present disclosure include methods and apparatuses utilized to reduce residual film layers from a substrate periphery region, such as an edge or bevel of the substrate. Contamination of the substrate bevel, backside and substrate periphery region may be reduced after a plasma process. In one embodiment, an edge ring includes a base circular ring having an inner surface defining a center opening formed thereon and an outer surface defining a perimeter of the base circular ring. The base circular ring includes an upper body and a lower portion connected to the upper body. A step is formed at the inner surface of the base circular ring and above a first upper surface of the upper body. The step defines a pocket above the first upper surface of the upper body. A plurality of raised features formed on the first upper surface of the base circular ring.
Public/Granted literature
- US20160307742A1 EDGE RING FOR BEVEL POLYMER REDUCTION Public/Granted day:2016-10-20
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