Patent ID: 8089150
Filing Date: 2012-01-03
Classification: H01L,H02M

Abstract:
1. A structurally robust power switching assembly, comprising: (a) a first power transistor and a second power transistor, both comprising a thin and delicate layer of metal oxide, and, for both, a major surface of said layer of metal oxide being substantially coincident with a major surface of said power transistor, said major surface of said first power transistor defining a first emitter, and said major surface of said second power transmitter defining a second emitter; (b) a set of more than 50 highly conductive first pillars constructed out of a relatively soft material, supported by said first emitter and a set of more than 50 highly conductive second pillars constructed out of a relatively soft material, supported by said second emitter; and (c) a rigid structure being thermally mismatched to both said major surface of said first power transistor and said major surface of said second power transistor, and defining a first electrically conductive pathway that is rigidly and electrically connected to said set of first pillars and a second electrically conductive pathway that is rigidly and electrically connected to said set of second pillars; and (d) wherein said highly conductive pillars are adapted to mitigate stress on each said layer of metal oxide due to said thermal expansion mismatch between said rigid structure and said major surface of both said first power transistor and said second power transistor.