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:
Jul. 13, 2010
Filed:
Jul. 25, 2006
Shoichi Murakami, Amagasaki, JP;
Takashi Yamamoto, Amagasaki, JP;
Tatsuo Hiramura, Amagasaki, JP;
Sumitomo Precision Products Co., Ltd., Hyogo, JP;
Abstract
Etching and protective-film deposition operations E and D are in alternation repeatedly executed on a silicon substrate carried on a platform within a processing chamber. With gas inside the processing chamber having been exhausted to pump down the chamber interior, in the etching operation E, the substrate is etched by supplying etching gas into the chamber and converting it into plasma and applying a bias potential to the platform, and in the protective-film deposition operation D, a protective film is formed on the silicon substrate by supplying protective-film deposition gas into the processing chamber and converting it into plasma. When a predetermined time prior to the close of operations E and D (time intervals indicated by reference marks Ee and De) is reached, the supply of etching or protective-film deposition gas is halted, and the exhaust flow rate of gas exhausted from the chamber is made greater than that previously.