Invention Grant
- Patent Title: Shadow ring for modifying wafer edge and bevel deposition
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Application No.: US12974365Application Date: 2010-12-21
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Publication No.: US10227695B2Publication Date: 2019-03-12
- Inventor: Dale R. Du Bois , Mohamad A. Ayoub , Robert Kim , Amit Bansal , Mark Fodor , Binh Nguyen , Siu F. Cheng , Hang Yu , Chiu Chan , Ganesh Balasubramanian , Deenesh Padhi , Juan Carlos Rocha
- Applicant: Dale R. Du Bois , Mohamad A. Ayoub , Robert Kim , Amit Bansal , Mark Fodor , Binh Nguyen , Siu F. Cheng , Hang Yu , Chiu Chan , Ganesh Balasubramanian , Deenesh Padhi , Juan Carlos Rocha
- 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: C23C14/04
- IPC: C23C14/04 ; C23C16/04 ; C23C16/44 ; C23C16/455 ; C23C16/458 ; C30B25/12 ; H01J37/32 ; H01J37/34 ; H01L21/687

Abstract:
Embodiments of the invention contemplate a shadow ring that provides increased or decreased and more uniform deposition on the edge of a wafer. By removing material from the top and/or bottom surfaces of the shadow ring, increased edge deposition and bevel coverage can be realized. In one embodiment, the material on the bottom surface is reduced by providing a recessed slot on the bottom surface. By increasing the amount of material of the shadow ring, the edge deposition and bevel coverage is reduced. Another approach to adjusting the deposition at the edge of the wafer includes increasing or decreasing the inner diameter of the shadow ring. The material forming the shadow ring may also be varied to change the amount of deposition at the edge of the wafer.
Public/Granted literature
- US20110159211A1 SHADOW RING FOR MODIFYING WAFER EDGE AND BEVEL DEPOSITION Public/Granted day:2011-06-30
Information query
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