Patent ID: 6156980
Filing Date: 2000-12-05
Classification: H01L,H05K

Abstract:
A circuit board assembly comprising:a substrate having electrical conductors and a first thermal conductor layer on a first surface thereof and having a second thermal conductor layer on a second surface opposite the first surface;a surface-mount IC device mounted to the first surface of the substrate, the surface-mount IC device having a first set of solder bumps registered with the electrical conductors and at least one solder bump registered with the first thermal conductor layer;a via within the substrate between the first surface of the substrate and the second surface of the substrate;a heat-conductive material within the via and contacting the first thermal conductor layer on the first surface of the substrate; anda heatsink embedded within the substrate between the via and the second thermal conductor layer and contacting the heat-conductive material within the via, wherein heat is conducted from the surface-mount IC device to the second thermal conductor layer through the at least one solder bump, the first thermal conductor layer, the heat-conductive material within the via, and the heatsink.