Patent ID: 7489032

Claim:
A semiconductor device comprising: a base plate having a flat upper surface; a semiconductor constituent body which is formed on the flat upper surface of the base plate and which includes a semiconductor substrate and a plurality of external connecting electrodes formed on the semiconductor substrate; an insulating layer which has an upper surface and a thickness, and which is formed on the flat upper surface of the base plate around a peripheral side surface of the semiconductor constituent body; a hard sheet, which has a thickness that is substantially the same as a thickness of the base plate and that is smaller than the thickness of the insulating layer, and which is buried in the upper surface of the insulating layer such that an upper surface of the hard sheet is substantially level with an upper surface of the semiconductor constituent body and with the upper surface of the insulating layer; an upper insulating film formed on the semiconductor constituent body and on the hard sheet and provided with a hole; and an interconnection formed on the upper insulating film and connected to at least one of the external connecting electrodes of the semiconductor constituent body through the hole.