Patent ID: 6365444
Filing Date: 2002-04-02
Classification: G02F,H01L

Abstract:
A process for forming a crystalline thin film transistor (TFT) liquid crystal display (LCD), comprising steps of:providing a substrate made of an insulating material; forming a first conductive layer on said substrate; performing a first masking and patterning procedure to define a gate conductive region on said substrate; successively forming an insulation layer, an amorphous semiconductor channel layer, a catalytic layer and a doped semiconductor layer on said substrate; performing a second masking and patterning procedure to remove portions of said doped semiconductor layer and said catalytic layer to define an electrode region; performing a thermal treatment for said substrate to respectively convert said electrode region and said amorphous semiconductor channel layer into a source/drain region and a crystalline semiconductor channel layer by said catalytic layer; forming a second conductive layer on said substrate and performing a third masking and patterning procedure to define a data line; forming a passivation layer and performing a fourth masking and patterning procedure to remove portions of said passivation for forming a contact hole accessible to said data line; and forming a transparent electrode layer and performing a fifth masking and patterning procedure to define a transparent pixel electrode region, thereby forming said crystalline thin film transistor.