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:
Sep. 04, 2012
Filed:
Aug. 13, 2009
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-ken, JP;
Abstract
Provided is a liquid crystal display device capable of significantly reducing occurrence of a failure such as an interlayer short-circuit. In the liquid crystal device, a first layer formed of a copper film having a purity of 99.5% or more and a second layer formed of an alloy film containing copper as a main component are successively formed on a glass substrate or a substrate on which a transparent conductive film containing indium is formed. The alloy film serving as the second layer is made of an alloy containing copper as a main component, which has a higher etching rate in a wet etching process compared with that of copper. Accordingly, a patterned cross-section of the copper film having a large film thickness can be etched in a tapered shape, to thereby improve coverage of an insulating film or the like laminated on a wiring pattern.