Process for forming polycrystalline thin film transistor liquid crystal display

The present invention relates to a process for forming a thin film transistor-liquid crystal display (TFT-LCD), and more particularly to a process for forming a complementary poly-silicon TFT-LCD. A process for forming a polycrystalline TFT LCD is provided, thereby greatly reducing the manufacturing cost and time. The process includes steps of performing a first masking procedure to define a gate conductive region, successively forming an insulation layer, an amorphous channel semiconductor layer, a catalytic layer and a doped semiconductor layer, performing a second masking procedure to remove portions of the semiconductor layer and the catalytic layer to define an electrode region, performing a thermal treatment to respectively convert the electrode region and the amorphous semiconductor channel layer into a source/drain region and a crystalline semiconductor channel layer by the catalytic layer, performing a third masking procedure to define data lines, performing a fourth masking procedure to form a contact hole, and performing a fifth masking procedure to define a transparent pixel electrode region, thereby forming the TFT.