Patent ID: 6958535
Filing Date: 2005-10-25
Classification: H01L,H05K

Abstract:
1. A semiconductor module comprising a thermal conductive substrate comprising a wiring pattern, an electrical insulating layer and a thermal radiation board, the electrical insulating layer being composed of a thermal conductive mixture containing 70-95 wt % of an inorganic filler and 5-30 wt % of a thermosetting resin, and the thermal radiation board having a thermal expansion coefficient that is larger than an average thermal expansion coefficient of the wiring pattern and of the electrical insulating layer, a semiconductor device is mounted on a top portion of the thermal conductive substrate; and substrate fixing components for attachment to an external thermal radiation member are provided on the thermal radiation board and attached to the external thermal radiation member on a bottom portion of the thermal conductive substrate which is opposite to the top portion of the thermal conductive substrate on which the semiconductor device is mounted with a space between the thermal conductive substrate and external thermal radiation member; wherein the thermal conductive substrate is warped to protrude towards, and presses up against, the attached external thermal radiation member as a result of temperature of the thermal conductive substrate rising such that a space between the thermal conductive substrate and the external thermal radiation member is reduced.