Patent ID: 6528357
Filing Date: 2003-03-04
Classification: H01L

Abstract:
A method of manufacturing an array substrate for a display device having a scanning line and gate electrode on a substrate; a thin film transistor having a gate insulator film on said scanning line and gate electrode, a semiconductor film thereon, source and drain electrodes electrically connected to said semiconductor film; a signal line as taken out of the drain electrode to extend substantially perpendicularly to said scanning line; and a pixel electrode electrically connected to the source electrode, comprising steps of:forming said scanning line and gate electrode by patterning a multi-layer metal film having an aluminum alloy layer and a refractory metal layer disposed on the aluminum alloy layer; depositing said gate insulator film in direct contact with said scanning line and gate electrode at a temperature not less than 300Â° C.; depositing an amorphous transparent electric conductive film; patterning said amorphous transparent electric conductive film for forming said pixel electrode with a wet etching technique; and converting said amorphous film to a crystalline transparent electric conductive film having a low resistivity.