Patent ID: 7691656
Filing Date: 2010-04-06
Classification: H01L

Abstract:
1. A method for an epitaxial fabrication of a radiation-emitting semiconductor component, the method comprising the steps of: providing a composite substrate having a substrate body and an interlayer applied to the substrate body using a bonding process, the substrate body having a given coefficient of thermal expansion, the interlayer being formed from AlGaN; applying GaN-based layers to the interlayer of the composite substrate, the GaN-based layers collectively having a bottom facing the composite substrate and a top facing away form the composite substrate; applying a carrier to the GaN-based layers; forming a reflector layer on the top of the GaN-based layers so that the GaN-based layers are arranged between the reflector layer and the composite substrate, and the reflector layer is disposed between the GaN-based layers and the carrier; and arranging the reflector layer to reflect radiation generated in the GaN-based layers; wherein the reflector layer is an electrical contact surface; and wherein the given coefficient of thermal expansion of the substrate body is equal to or greater than a coefficient of thermal expansion of the GaN-based layers.