INSULATED GATE TRANSISTOR AND LIQUID CRYSTAL DISPLAY AND METHOD FOR MANUFACTURING SEMICONDUCTOR DEVICE FOR DISPLAY

摘要

PROBLEM TO BE SOLVED: To rationalize/reduce a process of achieving cost reduction of liquid crystal image display where a low temperature poly silicon is used as a semiconductor element. SOLUTION: By rationalizing a scanning line forming and an island forming step of semiconductor layers and by making interlayer dielectrics unnecessary, a four-mask process is developed. Making the resistance of signal lines low and the passivation are easily performed by using plating.