Patent ID: 8785318

Claim:
A method of manufacturing a semiconductor device comprising steps of: (a) forming a semiconductor element in a semiconductor substrate; (b) forming a first insulating film over the semiconductor element; (c) forming a pad over the first insulating film; (d) forming a second insulating film over the pad and the first insulating film such that the second insulating film covers a top surface of the pad and side surfaces of the pad; (e) forming a third insulating film over the second insulating film; (f) polishing the third insulating film by a CMP method; (g) after the step (f), forming a fourth insulating film over the third insulating film, wherein a material of the fourth insulating film is different from materials of the second and third insulating films; (h) forming an opening which reaches the pad, by etching the second, third, and fourth insulating films; and (i) forming a bump electrode over the pad and the fourth insulating film, said bump electrode being electrically connected to the pad.