Patent ID: 8274125

Claim:
A semiconductor device comprising: a semiconductor element; and a substrate on which the semiconductor element is mounted, wherein the semiconductor element includes a light receiving portion and a bonding pad on a first surface, and a back surface of the first surface is mounted on the substrate, an extraction electrode is formed on a mounting surface of the substrate on which the semiconductor element is mounted, the bonding pad and the extraction electrode are connected together by a metal thin wire, a first insulation, which exists between the light receiving portion and the bonding pad and surrounds the light receiving portion, is provided on the first surface of the semiconductor element, the bonding pad and the metal thin wire are encapsulated with a sealing resin, an outer edge of the first insulation is in contact with the sealing resin on the first surface of the semiconductor element, an inner wall of the first insulation facing the light receiving portion and surrounding the light receiving portion has a tapered shape in which an opening area gradually expands with an increase in a distance from the first surface of the semiconductor element, the extraction electrode extends to an outer edge of the mounting surface; and a second insulation is formed surrounding the mounting surface and on the extraction electrode.