Patent ID: 6721026
Filing Date: 2004-04-13
Classification: G02F

Abstract:
A process for forming an in-plane switching mode liquid crystal display (IPS-LCD), comprising steps of:providing a substrate made of an insulating material; forming a first conductive layer on a first side of said substrate, and defining a gate conductive structure, and a bus portion of a common electrode; forming a tri-layer structure consisting of a gate insulation layer, a semiconductor layer, and an etch stopper layer; defining an etch stopper structure with a portion of said semiconductor layer exposed; forming a highly doped semiconductor layer, and defining a contact via for interconnection to said bus portion of said common electrode; forming a second conductive layer made of a material selected from a group consisting of indium tin oxide, indium zinc oxide and indium lead oxide, and defining source/drain regions, a data line, a pixel portion of a data electrode, and a pixel portion of said common electrode with said etch stopper structure and said gate insulation layer as a stopper, wherein said pixel portion of said common electrode is interconnected to said bus portion of said common electrode through said contact via; and forming a passivation layer, and defining a pixel region for exposing said pixel portions of said data and common electrodes.