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:
Jun. 21, 2016
Filed:
May. 21, 2015
Semiconductor Energy Laboratory Co., Ltd., Atsugi-shi, Kanagawa-ken, JP;
SEMICONDUCTOR ENERGY LABORATORY CO., LTD., Kanagawa-ken, JP;
Abstract
To establish a processing technique in manufacture of a semiconductor device including an In—Sn—Zn—O-based semiconductor. An In—Sn—Zn—O-based semiconductor layer is selectively etched by dry etching with the use of a gas containing chlorine such as Cl, BCl, SiCl, or the like. In formation of a source electrode layer and a drain electrode layer, a conductive layer on and in contact with the In—Sn—Zn—O-based semiconductor layer can be selectively etched with little removal of the In—Sn—Zn—O-based semiconductor layer with the use of a gas containing oxygen or fluorine in addition to a gas containing chlorine.