Heat dissipating insulating mounting

Claim 1

In a heat dissipating insulating assembly for a heat generating electrical device, the combination comprising: a metallic support member having an exposed upper face portion for direct mounting engagement with the heat generating electrical device to receive heat therefrom, an inner face opposite said upper face and across which such heat is to be transferred, and circumferential outer surfaces extending between the upper and inner faces; a metallic heat transfer member having an inner face in a position directly facing and closely spaced from the inner face of said support member for transfer of heat between the inner faces, an attachment portion for securement of the assembly to a heat sink, and circumferential outer surfaces extending between the attachment portion and the inner face; an electrical insulating layer of thin cross section disposed tightly between the inner faces of said members, which layer has a circumferential margin extending beyond the boundaries of said inner faces; and a molded, resinous jacket encircling the circumferential outer surfaces of said support and transfer members which encapsulates the circumferential margin of said insulating layer, such jacket holding said support and transfer members and said insulating layer tightly against one another.