Patent ID: 7411260

Claim:
A semiconductor device whose main surface contains a sensor region where multiple sensor cells are formed, comprising: a semiconductor substrate; a first insulating film formed on the semiconductor substrate; a second insulating film formed on the first insulating film; a patterned first conducting layer formed on the second insulating film; a third insulating film formed to cover the first conducting layer on the second insulating film; and a fourth insulating film formed on the third insulating film, wherein each of the multiple sensor cells in the sensor region includes: a first cavity formed between the first insulating film and the second insulating film; and a first electrode formed from the first conducting layer, above the first cavity, wherein a first opening is formed on the second and the third insulating films to reach the first cavity by penetrating through the second and the third insulating films, wherein the fourth insulating film blocks the first opening, wherein a second cavity is formed between the first insulating film and the second insulating film, on a first region other than the sensor region on the main surface of the semiconductor device, wherein a second opening is formed in the second and the third insulating films to reach the second cavity by penetrating through the second and the third insulating films, wherein the fourth insulating film blocks the second opening, and wherein among the second cavities, no first conducting layer is formed over the second cavity position farthest from the second opening.