Patent ID: 8604497
Filing Date: 2013-12-10
Classification: H01L

Abstract:
1. A radiation-emitting thin-film semiconductor chip comprising an epitaxial multilayer structure, a carrier substrate and a reflective layer or interface, the epitaxial multilayer structure comprising: an active, radiation-generating layer, a first main face, and a second main face remote from the first main face for coupling out the radiation generated in the active, radiation-generating layer, wherein the first main face of the multilayer structure is coupled to the reflective layer or interface, and wherein a patterned region of the multilayer structure that adjoins the second main face of the multilayer structure is patterned by either one- or two-dimensional depressions forming convex elevations, each said convex elevation having an upper surface that is not contiguous with an upper surface of an adjacent elevation, wherein the epitaxial multilayer structure is based on one of an arsenide compound semiconductor material and GaN, wherein the depressions of the patterned region are formed in said epitaxially grown semiconductor material of the multilayer structure, wherein the reflective layer is located between the carrier substrate and the epitaxial multilayer structure, and wherein the reflective layer is formed as a metallic contact layer.