Patent ID: 6753550
Filing Date: 2004-06-22
Classification: H01L

Abstract:
A liquid crystal display device comprising:an electrode functioning as a pixel; and a thin film transistor for applying a voltage to said electrode, wherein said thin film transistor includes a substrate, a gate electrode formed on the substrate, a gate insulating film formed on the gate electrode, an island-shaped amorphous silicon film formed on the gate insulating film and source and drain electrodes formed on the amorphous silicon film, and wherein the island-shaped amorphous silicon film of said thin film transistor is composed of a plurality of layers grown at different deposition rates, an upper layer in the amorphous silicon film, which is closer to said source and drain electrodes, is formed of a low defect-density amorphous silicon layer grown at a low deposition rate and a lower layer in the amorphous silicon film is formed of a high defect-density amorphous silicon layer grown at a higher deposition rate.