| 摘要 |
PROBLEM TO BE SOLVED: To improve the performance of a protection circuit to which a diode composed of a semiconductor film is applied. SOLUTION: The protection circuit is inserted between two input/output terminals. The protection circuit includes a diode composed of a semiconductor film formed on an insulating surface. Contact holes for connecting an N-type impurity region and a P-type impurity region of the diode to a first conductive film of the protection circuit are distributed over the entire impurity regions. Further, the contact holes for connecting the first conductive film and a second conductive film in the protection circuit are dispersedly formed on the semiconductor film. By forming the contact holes in this manner, wiring resistance between the diode and the terminal can be reduced and the entire semiconductor film of the diode can effectively function as a rectifier element. COPYRIGHT: (C)2010,JPO&INPIT |
