Patent ID: 6724631
Filing Date: 2004-04-20
Classification: H01L,H05K,Y10T

Abstract:
A package for a power converter, comprising:a multi-layer circuit board having a first electrically conductive surface and a second electrically conductive surface opposite to the first electrically conductive surface; a heat spreader having at least a heat transfer surface; and a sub-package including a bare top heat-slug, a power-dissipating chip mounted on a first surface of the bare top heat-slug, a plurality of symmetric leads fixedly connected to the bare top heat-slug, and bonding structures connected between the symmetric leads and the power-dissipating chip, wherein the sub-package is disposed between one of the electrically conductive surfaces of the multi-layer circuit board and the heat transfer surface of the heat spreader such that a second surface of the bare top heat slug is in contact with the heat transfer surface of the heat spreader through a thermally conductive insulator to provide a thermally conductive pathway therebetween, and the plurality of symmetric leads are in contact with a first surface of the electrically conductive surfaces of the multi-layer circuit board to provide an electrically conductive pathway therebetween, wherein the plurality of symmetric leads and the heat-slug are disposed in opposite orientations so that the electrically conductive pathway is separate from the thermally conductive pathway.