Patent ID: 8836103
Filing Date: 2014-09-16
Classification: H01L

Abstract:
1. A semiconductor unit, comprising: an insulation layer; a conductive layer bonded to one side of the insulation layer; a semiconductor device mounted on the conductive layer; a cooler thermally coupled to the other side of the insulation layer; a first bus bar having a bonding surface bonded to the semiconductor device or the conductive layer and a non-bonding surface that is the part of the first bus bar other than the bonding surface; and a second bus bar having a bonding surface bonded to the semiconductor device or the conductive layer and a non-bonding surface that is the part of the second bus bar other than the bonding surface, the second bus bar having a greater ratio of the area of the bonding surface to the area of the non-bonding surface than the first bus bar, wherein the second bus bar has a lower electric resistance than the first bus bar.