Patent ID: 6775141
Filing Date: 2004-08-10
Classification: H01L,H05K

Abstract:
An electronic circuit board assembly comprising:an electronic circuit board on which a plurality of electronic components are mounted; an electrical insulation sheet; and a heat dissipation board in facial contact with the electronic circuit board with the electrical insulation sheet interposed therebetween, the heat dissipation board being formed with at least one recessed portion on a top surface facing the electronic circuit board and having side surfaces connecting to the top surface, the recessed portion having side walls and a bottom wall, wherein a heat dissipation material is coated over the recessed portion and at least one electronic component from the plurality of electronic components is accommodated in the recessed portion over which the heat dissipation material is coated, wherein the heat dissipation material fills a gap between the electronic component and the side walls and the bottom wall of the recessed portion, wherein the recessed portion formed in the heat dissipation board extends to at least one of the side surfaces of the heat dissipation board and the heat dissipation material is filled over an area covering the one of the side surfaces of the heat dissipation board.