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:
Nov. 18, 1997
Filed:
Dec. 29, 1995
Masaru Kajitani, Osaka, JP;
Satoshi Yabuta, Taki-gun, JP;
Katsuhiro Kawai, Yamatotakada, JP;
Masaya Okamoto, Soraku-gun, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An object of the invention is to enhance the ashing speed of resist. A parallel plate electrode type plasma etching device is used in a mixed gas atmosphere of SF.sub.6 gas and O.sub.2 gas with the concentration of SF.sub.6 gas defined within 5 vol. % to 15 vol. %. A substrate to be treated, coated with a resist of hydrocarbon polymer is placed on a lower electrode. A high frequency electric power is applied to an upper electrode and lower electrode placed parallel to each other, and a plasma of mixed gas is generated in the reactor. A chemical reaction is induced in the resist and active ions of the plasma to vaporize and remove the resist.