Patent ID: 7364931

Claim:
A manufacturing method of a capacitance detection type sensor, comprising the steps of: forming a transistor on a semiconductor substrate; forming a first interlayer insulating film on the semiconductor substrate, the first interlayer insulating film coating the transistor; forming a first contact hole in the first interlayer insulating film; forming a first layer wire on the first interlayer insulating film; forming a second interlayer insulating film on the first interlayer insulating film, the second interlayer insulating film covering the first layer wire; forming a second contact hole in the second interlayer insulating film; forming a second layer wire and a first electrostatic discharge electrode film on the second interlayer insulating film, the first electrostatic discharge electrode film being electrically connected to the transistor through the first contact hole, the first layer wire and the second contact hole; forming a third interlayer insulating film on the second interlayer insulating film, the third interlayer insulating film covering the second layer wire and the first electrostatic discharge electrode film; forming an opening and a third contact hole in the third interlayer insulating film, the opening exposing the first electrostatic discharge electrode film therefrom, and the third contact hole exposing a part of the second layer wire therefrom; forming a second electrostatic discharge electrode film so as to electrically connect to the first electrostatic discharge electrode film; forming a capacitance sensor electrode on the third interlayer insulating film, the capacitance sensor electrode being electrically connected to the second layer wire through the third contact hole; forming a cover film on the third interlayer insulating film, the cover film covering the second electrostatic discharge electrode film and the capacitance sensor electrode; and forming a plurality of holes above the second electrostatic discharge electrode film, the holes reaching the second electrostatic discharge electrode film from a surface of the cover film.