| 摘要 |
<P>PROBLEM TO BE SOLVED: To detect a void accurately by X-ray inspection even in the case of a heat exchanger equipped with a comb-type cooling fin and used in a power module. <P>SOLUTION: The heat exchanger 1 of a power module 2 comprises a case 3, a comb-type cooling fin 4 housed in the case 3, and a heat spreader bonded to the upper surface of the case 3 with a bonding agent 10. An IGBT 6 is fixed to the upper surface of the heat spreader with the bonding agent 10. The cooling fin 4 has a plurality of fins 4d projecting obliquely in parallel from the lower surface of a planar base 4a with a gap 9 between one other. The plurality of fins 4d of the cooling fin 4 are arranged so that the distal end 4e of one fin 4d1 and the proximal end 4f of the other adjoining fin 4d2 have the same width W2, and overlap each other in the direction perpendicular to the upper and lower surfaces of the base 4a. <P>COPYRIGHT: (C)2012,JPO&INPIT |
