Patent ID: 6261867
Filing Date: 2001-07-17
Classification: H01L

Abstract:
A method of making a package for a microelectronic device, comprising:providing a thermally conductive base having a surface, the base comprising a metal composite including a high conductivity metal and a ferrous alloy;providing an insulating substrate having an upper surface and a lower surface, the substrate having an aperture formed therein, the aperture exposing a portion of the surface of the base for mounting the device on the base;providing a conductive lead;oxidizing the surface of the base to form an iron oxide deposit thereon;disposing the lower surface of the insulating substrate on the surface of the base and the conductive lead on a portion of the upper surface of the insulating substrate to provide an assembly; andheating the assembly to bond the iron oxide deposit formed on the surface of the base to the lower surface of the insulating substrate and to embed the conductive lead on the portion of the upper surface of the insulating substrate.