Patent ID: 6212073
Filing Date: 2001-04-03
Classification: H01L,Y10T

Abstract:
A heat sink for an electronic part, the heat sink comprising:an electronic part supported by a circuit board;a heat dissipation plate located on the circuit board adjacent the electronic part for conducting heat to and dissipating heat from the electronic part, the heat dissipation plate being manufactured from an electrically conductive material and the heat dissipation plate being formed so as to cover and shield the electronic part from electromagnetic waves;a phase changing member being provided on a surface of said heat dissipation plate facing the electronic part, the phase changing member being manufactured from a base material having a heat conductive filler dispersed therein, and the phase changing member changing from an initial solid phase, once subjected to heat from an external source, and the phase changing member flowing into contact with the electronic part to facilitate soldering of the electronic part to the circuit board and couple the heat dissipation plate to the electronic part; andthe heat conductive filler being selected from the group consisting of alumina, aluminum hydroxide, SiC, beryllium oxide, aluminum nitride, boron nitride, and a mixture of at least two of alumina, aluminum hydroxide, SiC, beryllium oxide, aluminum nitride and boron nitride.