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:
May. 21, 2002
Filed:
Oct. 04, 1999
Takahiro Ochiai, Mobara, JP;
Toshiki Kaneko, Chiba, JP;
Takuya Takahashi, Hitachi, JP;
Kazumi Fujii, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A liquid crystal display device has good contact characteristics between an etched side end portion of a lower layer wiring line and an insulating film and the like, satisfactory step coverage, and satisfactory adhesion to a substrate so that disconnection of an upper layer wiring line and short-circuiting of the lower layer wiring line can be prevented to improve reliability. The liquid crystal display device comprises a wiring line having a laminated structure including a first layer which is made from a first metal layer formed over an insulating substrate and a second layer which is made from a second metal layer different from the first metal layer and is formed over the first metal layer, and the side end face of the first layer has a right-tapered shape with a taper angle of 60° or less, while the side end face of the second layer is approximately perpendicular to or counter-tapered with respect to the insulating substrate. The second layer has a thickness not greater than ½ of that of the first layer.