MATRIX TYPE DISPLAY DEVICE

摘要

PURPOSE:To improve the insulation characteristics and display quality of a thin film transistor(TFT) LCD in a small number of processes by improving the constitution a gate insulating film and an insulating film for electric charge holding capacitance. CONSTITUTION:At least the gate insulating films 5a and 6 or insulating films 4 and 5b for electric charge holding capacitance of a thin film transistor are formed of insulating films composed of >=2 layers; and at least one layer of each insulating film is formed of the same material as a common-use insulating film 5 and other insulating films of plural layers are formed of gate insulating films and/or dedicated insulating films 4 and 6 matching insulating films electric charge storage capacitance.