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:
Apr. 11, 2000
Filed:
Feb. 03, 1994
Applicant:
Inventors:
Stuardo A Robles, Sunnyvale, CA (US);
Thanh Pham, San Jose, CA (US);
Bang C Nguyen, Fremont, CA (US);
Assignee:
Applied Materials, Inc., Santa Clara, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B08B / ; C23C / ;
U.S. Cl.
CPC ...
134-11 ; 134-1 ; 134-12 ; 134-13 ; 134 21 ; 156643 ; 438905 ;
Abstract
An improved method of in-situ cleaning a throttle valve in a CVD device and exhaust flow control apparatus for facilitating such cleaning. The throttle valve is repositioned such that it is juxtaposed in close proximity to the exhaust gas port of the reaction chamber. A plasma is then ignited in a cleaning gas mixture of nitrogen trifluoride, hexafluoroethane and oxygen.