Patent ID: 8274323

Claim:
A semiconductor device comprising: an antenna circuit; and a boosting circuit for boosting a voltage supplied through the antenna circuit, the boosting circuit comprising: a plurality of rectifying elements connected in series between an input terminal portion and an output terminal portion of the boosting circuit, each of the rectifying elements including an input portion and an output portion, with an input portion of a first one of the rectifying elements being connected to the input terminal portion; and a plurality of capacitor elements each including a first electrode, a second electrode, and an insulating film interposed between the first electrode and the second electrode, wherein the first electrode of a first one of the plurality of capacitor elements is connected to an output portion of the first one of the plurality of rectifying elements; wherein the first electrode of a k-th one of the plurality of capacitor elements is connected to an output portion of a k-th one of the rectifying elements and to an input portion of a (k+1)th one of the rectifying elements (where k is an integer of 2≦k≦(n−1)); wherein the first electrode of the first one of the plurality of capacitor elements comprises a first conductive film and the second electrode of the first one of the plurality of capacitor elements comprises a second conductive film; and wherein the first electrode of at least another one of the plurality of capacitor elements comprises the first conductive film and the second electrode of at least another one of the plurality of capacitor elements comprises a semiconductor film.