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:
Dec. 03, 2013
Filed:
Aug. 28, 2012
Takaaki Suzuki, Kasama, JP;
Takuya Takahashi, Hitachi, JP;
Takaaki Suzuki, Kasama, JP;
Takuya Takahashi, Hitachi, JP;
Hitachi Displays, Ltd., Chiba, JP;
Panasonic Liquid Crystal Display Co., Ltd., Hyogo-En, JP;
Abstract
A liquid crystal display device and method includes a pair of substrates with liquid crystal sandwiched therebetween, a plurality of intersecting scanning signal lines and image signal lines, a thin film transistor formed corresponding to each intersection, a pixel electrode which is formed in a pixel region and connected to the thin film transistor, a gate insulating film, and a protective insulating film. At least one of the scanning signal lines and the image signal lines are each formed of a laminated film including a first layer and a second layer, wherein the first layer is formed of a copper film having a purity of at least 99.5%, and the second layer is formed of an alloy film containing copper as a main component. The first layer and the second layer are collectively subjected to wet etching with an etchant having a predetermined pH.