Patent ID: 7138711
Filing Date: 2006-11-21
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a support substrate having a first side and a second side; and a plurality of thermally-conductive via interconnects extending therethrough; a thermally-conductive plane layer overlying the first side of the support substrate; a first soldermask overlying the thermally-conductive plane layer; a semiconductor die mounted over the first soldermask; a layer of electrically-conductive traces overlying a portion of the second side of the support substrate, the traces not in contact with the thermally-conductive via interconnects; a second soldermask overlying the electrically-conductive traces; a first array of a plurality of electrically-conductive balls disposed through openings in the soldermask overlying the electrically-conductive traces, the electrically-conductive balls in contact wit the electrically-conductive traces but not with the thermally-conductive via interconnects; and a second array of a plurality of thermally-conductive balls disposed on the second side of the support substrate in contact with the thermally-conductive via interconnects but not with the electrically-conductive traces, such that heat from the die conveyed into the thermally-conductive plane layer is conveyed through the thermally-conductive via interconnects and into the thermally-conductive balls but not into the electrically-conductive balls.