Liquid crystal panel, liquid crystal display device, and manufacturing method thereof

Abstract

A gate line ( 40 ) has a two-layered structure comprising a lower gate line ( 40 a ) made of material identical to a pixel electrode ( 70 ), and positioned in the same layer as the pixel electrode ( 70 ), and an upper gate line ( 40 b ) layered on the lower gate line ( 40 b ), and made of material having a higher electrical conductivity than the transparent conductive material. According to this structure, it is possible to reduce the number of times performing exposure processes in manufacturing an in-plane switching type liquid crystal panel.

1 - 17 . (canceled) 
     
     
         18 . A liquid crystal panel comprising:
 a first substrate,   a second substrate,   a liquid crystal material sandwiched therebetween,   a pixel electrode formed on the first substrate and made of a transparent conductive material,   a gate line formed on the first substrate and connected to a gate electrode of a thin film transistor,   a first insulating layer covering the gate line and the pixel electrode,   a semiconductor layer, a source electrode and a drain electrode of the thin film transistor formed on the first insulating layer,   a second insulating layer covering the source electrode and the drain electrode of the thin film transistor and the first insulating layer,   a common electrode formed on the second insulating layer and made of the transparent conductive material,   a first contact hole and a second contact hole penetrating to both the first insulating layer and the second insulating layer,   the pixel electrode is electrically connected to the source electrode of the thin film transistor through the first contact with a connecting conductor, and   a common line includes a transparent conductive layer positioned in a same layer as the pixel electrode and is electrically connected to the common electrode through the second contact hole.   
     
     
         19 . A liquid crystal panel of  claim 18  wherein, the common line is formed in parallel with the gate line. 
     
     
         20 . A liquid crystal panel of  claim 18  wherein,
 the gate line and the common line have two-layered structure that comprises a lower line made of the same material as the pixel electrode and positioned in a same layer with the pixel electrode, and an upper line layered on the lower line and made of material having a higher electrical conductivity than the lower line. 
 
     
     
         21 . A liquid crystal panel of  claim 18  wherein,
 the connecting conductor is made of a material identical to the common electrode. 
 
     
     
         22 . The liquid crystal panel of  claim 18 , wherein the source electrode overlaps the pixel electrode in a plan view. 
     
     
         23 . The liquid crystal panel of  claim 18 , wherein an end part of the source electrode is exposed from the second insulator and is connected to the connecting conductor. 
     
     
         24 . The liquid crystal panel of  claim 18 , wherein at least part of the connecting conductor is positioned in a same layer with the common electrode.