Invention Grant
- Patent Title: Plasma particle extraction process for PECVD
- Patent Title (中): PECVD等离子体粒子提取过程
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Application No.: US12070616Application Date: 2008-02-19
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Publication No.: US08192806B1Publication Date: 2012-06-05
- Inventor: Sesha Varadarajan , Edward Augustyniak , Jeffrey Benzing
- Applicant: Sesha Varadarajan , Edward Augustyniak , Jeffrey Benzing
- Applicant Address: US CA San Jose
- Assignee: Novellus Systems, Inc.
- Current Assignee: Novellus Systems, Inc.
- Current Assignee Address: US CA San Jose
- Agency: Weaver Austin Villeneuve & Sampson LLP
- Main IPC: H05H1/24
- IPC: H05H1/24

Abstract:
A plasma-enhanced chemical vapor deposition (PECVD) process including plasma particle extraction is described. Charged particles suspended in discharge volume are moved together with a plasma and can then be flushed away. The particle extraction process reduces unwanted particles on the wafer after deposition and reduces total process time. In some embodiments, the process can involve powering an electrode in the process chamber located away from the wafer. This electrode can be powered up as the main deposition electrode is powered down.
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