Patent ID: 7705355

Claim:
A thin-film transistor display device, comprising: a gate line and a gate electrode on a substrate; a first insulating layer on the gate line and gate electrode; a semiconductor layer on said first insulating layer; a data line including a source electrode and a drain electrode on said semiconductor layer, said data line and drain electrode comprising a first underlying refractory metal layer in contact with said semiconductor layer and a first metal layer on the first refractory metal layer; a second insulating layer directly contacting a portion of said semiconductor layer and having a contact hole therein that exposes the first refractory metal layer and side walls of the first metal layer; a pixel electrode on said second insulating layer, said pixel electrode extending into the contact hole and directly contacting the first refractory metal layer; a first conductive pattern electrically connected to an end portion of the gate line; and a second conductive pattern electrically connected to an end portion of the data line.