The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 06, 2011
Filed:
Aug. 22, 2008
Applicant:
Hiroyuki Takahashi, North Andover, MA (US);
Inventor:
Hiroyuki Takahashi, North Andover, MA (US);
Assignee:
Tokyo Electron Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 21/3065 (2006.01);
U.S. Cl.
CPC ...
Abstract
An exhaust assembly is described for use in a plasma processing system, whereby secondary plasma is formed in the exhaust assembly between the processing space and chamber exhaust ports in order to reduce plasma leakage to a vacuum pumping system, or improve the uniformity of the processing plasma, or both. The exhaust assembly includes a powered exhaust plate in combination with a ground electrode is utilized to form the secondary plasma surrounding a peripheral edge of a substrate treated in the plasma processing system.