Patent ID: 6081428
Filing Date: 2000-06-27
Classification: H01L

Abstract:
A cooling apparatus for cooling a plurality of electric devices mounted on a printed circuit board, comprising:a cooling plate positioned over said printed circuit board for receiving heat generated by said electric devices and transmitting the heat to an external area to cool said electric devices;an elastic sheet made of electrically insulating material and attached to a bottom surface of said cooling plate for contacting with upper surfaces of said electric devices;means for attaching said elastic sheet to said cooling plate in a manner to form a closed space therebetween;heat conductive springs provided within said closed space for pressing said elastic sheet toward said surfaces of said electric devices and transmitting said heat to said cooling plate when said cooling apparatus is placed on said printed circuit board;a heat distribution sheet provided between said elastic sheet and said heat conductive springs to distribute said heat received from said elastic sheet throughout said heat distribution sheet; anda first layer of heat conductive grease applied between said heat distribution sheet and said heat conductive springs.