Patent ID: 8004086

Claim:
A semiconductor device comprising: a semiconductor substrate; a first layer on the semiconductor substrate, wherein the first layer includes a first insulation film and a gate electrode formed on the semiconductor substrate; a plurality of second layers on the first layer, wherein each of the second layers includes a second insulation film, a plurality of first metal via patterns, and a first metal wiring, wherein the second insulation film has a dielectric constant of less than 2.7, wherein the plurality of first metal via patterns are formed in the second insulation film, wherein a top of each of the first metal via patterns is connected to a bottom of the first metal pattern in the second insulation film, and wherein the first metal wiring is formed in the second insulation film; a third layer on the plurality of second layers, wherein the third layer includes a third insulation film, a second metal wiring and a plurality of second metal via patterns, wherein the third insulation film has a dielectric constant of more than 2.7, wherein the second metal wiring and the plurality of second metal via patterns are formed in the third insulation film, and wherein each of the second metal via patterns has a top which contacts with a bottom of the second metal wiring; and a fourth layer on the third layer, wherein the fourth layer includes a pad electrode, a passivation film and an opening, wherein the pad electrode includes an aluminum material and electrically connects to the second metal wiring, wherein the passivation film includes SiN and covers over the pad electrode and the third layer, and wherein the opening opens the passivation film to expose a part of the pad electrode, wherein the pad electrode overlays the first metal wiring, the plurality of first metal via patterns, the second metal wiring and the plurality of the second metal via patterns in plan view, and wherein no dummy metal pattern and no dummy metal via pattern are formed in the third layer directly under the pad electrode.