Patent ID: 6282094
Filing Date: 2001-08-28
Classification: H01L,Y10T

Abstract:
A BGA IC package with an unembedded type of heat-dissipation structure, which comprises:a substrate having a front surface and a back surface, with the front surface having a central part being defined as a die-attachment area;an IC chip mounted on the die-attachment area of the substrate;a plurality of first electrically-conductive traces formed over the front surface of the substrate, which is electrically connected to the IC chip;a plurality of electrically-conductive vias formed in the substrate and extending from the front surface to the back surface of the substrate;a plurality of electrically-conductive means arranged on the back surface of the substrate and electrically connected to the electrically-conductive vias;a plurality of thermally-conductive vias formed in the substrate and extending from the front surface to the back surface of the substrate;a plurality of thermally-conductive means arranged on the back surface of the substrate and thermally connected to the thermally-conductive vias; anda thermally-conductive layer formed over a thermally-conductive area in the back surface of the substrate where the thermally-conductive means are arranged and said thermally-conductive layer being embedded between the thermally-conductive means.