Patent ID: 8860081

Claim:
A semiconductor device comprising: a first terminal; a second terminal; a functional circuit electrically connected to the first terminal and the second terminal, and a protection circuit electrically connected to the first terminal and the second terminal, wherein the protection circuit comprises: a diode over an insulating surface, the diode comprising a semiconductor film comprising a plurality of p-type impurity regions and an n-type impurity region surrounding the plurality of p-type impurity regions; a first insulating film over the semiconductor film, the first insulating film comprising a plurality of first openings and a plurality of second openings; a first conductive film over the first insulating film; a plurality of second conductive films over the first insulating film; a second insulating film over the first conductive film and the plurality of second conductive films, the second insulating film comprising a plurality of third openings and a plurality of fourth openings; a third conductive film over the second insulating film; and a fourth conductive film over the second insulating film; wherein the n-type impurity region and the first conductive film are electrically connected to each other through the plurality of first openings, wherein the plurality of p-type impurity regions and the plurality of second conductive films are electrically connected to each other through the plurality of second openings, wherein the first conductive film and the third conductive film are electrically connected to each other through the plurality of third openings, and wherein the plurality of second conductive films and the fourth conductive film are electrically connected to each other through the plurality of fourth openings.