Patent ID: 7569930
Filing Date: 2009-08-04
Classification: H01L

Abstract:
1. A semiconductor module comprising: a rectangular circuit board comprising a conductive circuit having a via and a wiring pattern on a board surface thereof; semiconductor elements provided on both surfaces of the circuit board; rectangular radiator plates that are attached to the respective surfaces of the circuit board and that covers upper surfaces of the semiconductor elements so that outer peripheral edges of the radiator plate does not project from the circuit board; and a through hole or a notch formed on a portion of the circuit board, the portion being positioned at a longitudinally center area and a vicinity of the outer peripheral edge where the conductive circuit is not formed, wherein a part in the vicinity of the outer peripheral edge of each the radiator plates is bent so as to abut on the board surface in the vicinity of the outer peripheral edge of the circuit board, a projection projecting toward the through-hole or the notch is formed at a position of the radiator plate corresponding to the through-hole or the notch of the circuit board, the projection is engaged into the through-hole or the notch directly or by an engaging member so that the radiator plate is located at a predetermined position of the circuit board, and a part of the projection abuts on the corresponding board surface of the circuit board.