Patent ID: 6331443
Filing Date: 2001-12-18
Classification: G02F,H01L

Abstract:
A method for manufacturing a TFT substrate, the method comprising:(a) forming a gate electrode and a gate pad by a first photolithography process by sequentially depositing a first metal film and a second metal film over a substrate in a TFT area and a pad area, respectively;(b) forming an insulating film over the entire surface of the substrate on which the gate electrode and the gate pad are formed;(c) forming a semiconductor film over the TFT area using a second photolithography process;(d) forming a source electrode and a drain electrode in the TFT area using a third photolithography process, the source electrode and drain electrode comprising a third metal film;(e) forming a protection film pattern over the source electrode and the drain electrode in the TFT area and over the insulating film in the gate pad area, using a fourth photolithography process, the protection film pattern exposing a portion of the drain electrode and a top surface of the second metal film; and(f) forming a first and second pixel electrode pattern over the substrate and the protection film pattern using a fifth photolithography process, the first pixel electrode pattern being connected to the drain electrode in the TFT area, and the second pixel electrode pattern being connected to the top surface of the second metal film of the gate pad in the pad area.