Patent ID: 7456492
Filing Date: 2008-11-25
Classification: H01L

Abstract:
1. A semiconductor device comprising: first and second metal electrodes having heat radiation property, wherein inner surfaces of metal electrodes face each other; a semiconductor element sandwiched between the first and second metal electrodes, wherein the semiconductor element is electrically connected to both inner surfaces of the electrodes; and first and second insulation substrates having heat radiation property, wherein the first insulation substrate is disposed on the first metal electrode, and opposite to the semiconductor element, and wherein the second insulation substrate is disposed on the second metal electrode, and opposite to the semiconductor element, wherein each of the first and second insulation substrates is made of ceramics, at least one of the first and second metal electrodes includes a plurality of layers, which are stacked in a direction parallel to a stacking direction of the electrodes, the semiconductor element and the insulation substrates, and one layer disposed on a semiconductor element side has a thermal expansion coefficient, which is higher than that of another layer disposed on an insulation substrate side.