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:
Aug. 24, 2004
Filed:
Dec. 17, 2001
Gyoo-Chul Jo, Gyeonggi-do, KR;
Ki-Sung Chae, Gyeonggi-do, KR;
LG. Philips LCD Co., Ltd., Seoul, KR;
Abstract
A method of forming an array substrate for use in a thin film transistor liquid crystal display (TFT-LCD) device includes forming a first metal layer on a substrate, patterning the first metal layer to form a gate line and a gate electrode extended from the gale line, forming a gate insulation layer on the substrate to cover the patterned first metal layer, forming an active layer on the gate insulation layer and over the gate electrode, forming an ohmic contact layer on the active layer, forming a second metal layer on the gate insulation layer to rover the ohmic contact layer and the active layer, forming a third copper metal layer on the second metal layer, simultaneously patterning the second metal layer and the third copper metal layer to form a double-layered data line, a double-layered source electrode and a double-layered drain electrode using an etchant that includes hydrogen peroxide (H O ), a H O stabilizer, and a neutral salt, and forming a pixel electrode contacting the double-layered drain electrode.