Invention Grant
- Patent Title: Phosphorus fugitive emission control
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Application No.: US17406183Application Date: 2021-08-19
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Publication No.: US11545368B2Publication Date: 2023-01-03
- Inventor: Cuiyang Wang , Timothy J. Miller , Jun Seok Lee , Il-Woong Koo , Deven Raj Mittal , Peter G. Ryan, Jr.
- 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: Nields, Lemack & Frame, LLC
- Main IPC: H01L21/322
- IPC: H01L21/322 ; H01L21/263

Abstract:
A method of processing and passivating an implanted workpiece is disclosed, wherein, after passivation, the fugitive emissions of the workpiece are reduced to acceptably low levels. This may be especially beneficial when phosphorus, arsine, germane or another toxic species is the dopant being implanted into the workpiece. In one embodiment, a sputtering process is performed after the implantation process. This sputtering process is used to sputter the dopant at the surface of the workpiece, effectively lowering the dopant concentration at the top surface of the workpiece. In another embodiment, a chemical etching process is performed to lower the dopant concentration at the top surface. After this sputtering or chemical etching process, a traditional passivation process can be performed.
Public/Granted literature
- US20210384041A1 Phosphorus Fugitive Emission Control Public/Granted day:2021-12-09
Information query
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