Patent ID: 7428032
Filing Date: 2008-09-23
Classification: G02F

Abstract:
1. A thin film transistor substrate structure using a horizontal electric field liquid crystal display device, comprising: a gate line and a common line disposed on a substrate and arranged parallel with each other, wherein the gate line and the common line are formed from a first conductive layer; a data line on the substrate and intersecting the gate line and the common line, the data line insulated from the gate line and the common line by a gate insulating film therebetween, a pixel area being defined by the intersection of the data line with the gate line, wherein the data line is formed from a second conductive layer; a thin film transistor at the intersection of the data line and the gate line, and connected to the gate line and the data line; a common electrode having a portion extended from the common line into the pixel area and formed from the first conductive layer; a gate insulating film disposed between the first conductive layer and the second conductive layer, the gate insulating film at the pixel having a non-zero thickness thinner than at an area overlapping the second conductive layer; a protective film over the gate line, the common line, the data line, the common electrode, and the thin film transistor; and a pixel hole defined through the protective film and the gate insulating film and formed parallel with the common electrode; a pixel electrode having a portion extended into the pixel area and connected to the thin film transistor, wherein the pixel electrode is formed from a third conductive layer and forming a horizontal electric field with the common electrode, wherein the pixel electrode is disposed within the pixel hole.