Patent ID: 7749863
Filing Date: 2010-07-06
Classification: H01L

Abstract:
1. A method for fabricating a thermal management substrate, the method comprising acts of: selecting a monocrystalline substrate material; ion-implanting the monocrystalline substrate material to form a ion-implanted substrate wafer, the ion-implanted substrate wafer having a monocrystalline substrate layer, an ion-implanted layer, and a monocrystalline overlay layer, the monocrystalline substrate layer being comprised of the monocrystalline substrate material; bonding a handle wafer to the overlay layer with a bonding layer; splitting the ion-implanted substrate wafer at the ion-implanted layer, resulting in a handle wafer bonded with the monocrystalline overlay layer; depositing a thermally conductive electrically insulating layer directly onto the monocrystalline overlay layer such that the overlay layer is epitaxially-fused with the insulating layer and such that the overlay layer is positioned in direct physical contact with the insulating layer, resulting in a composite structure, wherein the act of depositing is performed by a technique selected from a group consisting of plasma enhanced chemical vapor deposition (PECVD), sputtering, thermal evaporation, and chemical vapor deposition (CVD); and removing the handle wafer, resulting in a thermal management substrate that comprises a monocrystalline overlay layer epitaxially-fused with the thermally conductive electrically insulating layer, wherein the monocrystalline overlay layer is positioned in direct physical contact with the thermally conductive electrically insulating layer.