Patent ID: 8609461
Filing Date: 2013-12-17
Classification: H01L

Abstract:
1. A method comprising: providing a diamond substrate having a major surface; growing a semiconductor interface layer on the major surface of the diamond substrate using an epitaxial growth technique, the semiconductor interface layer being in a form selected from amorphous, polycrystalline or both amorphous and polycrystalline forms, the interface layer providing a smoother and softer surface compared to the major surface of the diamond substrate; surface treating the semiconductor interface layer to provide the semiconductor interface layer with a surface root mean square (RMS) roughness of about 5 nm or less, the semiconductor interface layer and diamond substrate forming a heat spreader; and bonding a heat source to the surface treated semiconductor interface layer of the heat spreader, the heat source comprising a semiconductor device, the semiconductor interface layer of the heat spreader configured to provide an increased rate of heat transfer between the heat source and the heat spreader than would be achieved by the diamond substrate without the surface treated semiconductor interface layer.