Pressure contact type semiconductor device of the light triggered type

摘要

It is an object of the present invention to fix a semiconductor substrate and a thermal compensating plate in the alloy-free structure. An insulation resin (23) for side wall protection fixed on the outer periphery of a semiconductor substrate (1) and a projection (6a) inside an insulation tube are bonded with an adhesive agent (24) to restrict movements of the semiconductor substrate (1) in the radial direction. A thermal compensating plate (3) and a main electrode (5) are normally positioned with each other by a screw pin (32). A fixing ring (30) having resin or metal such as aluminum or the like which fits to the outer peripheral side of the main electrode (4) and the outer peripheral side of the thermal compensating plate (2) and the edge part of the upper main surface thereof restricts movement of the thermal compensating plate (2) in the radial direction. Further, a spring (31) interposed between a flange portion (4c) of the main electrode (4) and the fixing ring (30) presses and energizes the thermal compensating plates (2, 3) and the semiconductor substrate (1) against the main electrode (5). Since the free movements of the semiconductor substrate and the thermal compensating plates is restricted, the semiconductor substrate can be prevented from damage.