Patent ID: 6437240
Filing Date: 2002-08-20
Classification: H01L,Y10T

Abstract:
A microelectronic package comprising:(a) a first microelectronic element having a front surface including contacts and a rear surface, said first microelectronic element being operable in a range of operating temperatures; (b) a package element having a surface confronting the rear surface of said microelectronic element; (c) a first layer of a compliant material having top and bottom surfaces extending in lateral directions between said confronting surfaces of said first microelectronic element and said package element; (d) one or more masses of a thermally conductive material dispersed in said first compliant layer so that said thermally conductive masses are spaced apart from one another in lateral directions, said thermally conductive masses having a melting temperature within or below the range of operating temperatures of said first microelectronic element, each said thermally conductive mass being adjacent to said confronting surfaces of said first microelectronic element and said package element for transferring heat therebetween during operation of said first microelectronic element; and (e) a second microelectronic element overlying said front surface of said first microelectronic element so that said first microelectronic element is disposed between said package element and said second microelectronic element, said second microelectronic element being electrically connected to said first microelectronic element.