Patent ID: 8513808

Claim:
A semiconductor device, comprising: a first insulating film formed over a semiconductor substrate; an interconnection trench made in the first insulating film; a first interconnection formed inside the interconnection trench and comprising a first conductive film containing copper as a main conductive material; a second insulating film formed over the first interconnection and the first insulating film and having a first thickness; a third insulating film formed over the second insulating film and having a second thickness larger than the first thickness; a plug formed in the second and third insulating films so as to be coupled with the first interconnection and comprising a main conductive material different from that of the first conductive film; a second interconnection formed so as to be coupled with the plug and comprising a main conductive material different from that of the first conductive film; a first passivation film formed to cover the second interconnection and the third insulating film; an opening made in the first passivation film to expose the upper surface of the second interconnection; a trench made in the third insulating film and the first passivation film and between an element formation region and a dicing region; and a second passivation film formed to cover any side surface of the opening, wherein the bottom of the trench does not penetrate through the third insulating film in the film thickness direction of the third insulating film.