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. 16, 1997
Filed:
Nov. 17, 1994
Matsushita Electric Industrial Co. Ltd., Osaka, JP;
Abstract
A liquid crystal display (LCD) panel includes a short-circuit ring formed of aluminum or an aluminum alloy during manufacture. The short-circuit ring is formed along a gate wiring line or a source wiring line. After the panel is inspected for defects, the short-circuit ring is removed. In the LCD manufacturing process, a glass substrate is cut outside the short-circuit ring made of aluminum, and thereafter the short-circuit ring is removed by grinding the short-circuit ring while spraying water having a low resistance on the substrate. The water may include carbon dioxide gas. Low resistance aluminum may be used as the gate wiring line and the short-circuit ring. This aluminum material, which is used as a current supply wiring line, can be subjected to an anodic oxidation process. Thus, it is not necessary to form a film of any metal other than aluminum. This can simplify or reduce the number of fabrication processes. Furthermore, because the aluminum is trimmed off by grinding, it is not clawed during cutting. In this manner, the aluminum short-circuit material is removed without causing short circuits between adjacent wiring lines and without slipping the tooth when scribing a scratch marking line by a scriber.