Patent ID: 8148809
Filing Date: 2012-04-03
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor layer having a circuit portion, which includes a low potential reference circuit, a high potential reference circuit and a level shift circuit, wherein the low potential reference circuit, the high potential reference circuit and the level shift circuit are disposed in a principal surface portion of the semiconductor layer, the low potential reference circuit functions with a first potential as a reference potential, the high potential reference circuit functions with a second potential as a reference potential, the second potential is higher than the first potential, and the level shift circuit includes at least one level shift element for performing level shift of a reference potential between the low potential reference circuit and the high potential reference circuit; an insulation member fixed on a backside of the semiconductor layer and opposite to the circuit portion; a first conductive member arranged on the insulation member and opposite to at least a part of the low potential reference circuit; a second conductive member arranged on the insulation member and opposite to at least a part of the high potential reference circuit; and a third conductive member arranged on the insulation member and opposite to at least a part of the level shift circuit, wherein a potential to be applied to the first conductive member, a potential to be applied to the second conductive member and a potential to be applied to the third conductive member are different from each other, wherein the first conductive member is electrically coupled with a first part of the low potential reference circuit, to which the first potential is to be applied, wherein the second conductive member is electrically coupled with a second part of the high potential reference circuit, to which the second potential is to be applied, and wherein the third conductive member is electrically coupled with the level shift circuit.