Patent ID: 7615499
Filing Date: 2009-11-10
Classification: H01L,H01S,Y10S

Abstract:
1. A method for oxidizing a layer, comprising the following steps, carried out without restriction in the order indicated: providing a substrate, which bears a layer of a vertical cavity surface emitting laser which is to be oxidized, the layer which is to be oxidized being part of a layer stack which includes the substrate or a base layer at a base surface of the layer which is to be oxidized, and a neighboring layer which adjoins a surface of the layer to be oxidized which is remote from the base surface, and the layer which is to be oxidized being uncovered in an edge region of the layer stack; introducing the substrate which bears the layer stack into a holding device; introducing the holding device into a heating device; passing an oxidation gas onto the substrate; heating the substrate to a process temperature, the layer which is to be oxidized, as the oxidation time continues, being oxidized ever further from an edge into the layer stack under the influence of the oxidation gas at the process temperature, recording a temperature of the holding device, where the process temperature during the processing being the temperature of the holding device, or recording the temperature of the substrate; and controlling the temperature of the substrate to a predetermined desired temperature or a predetermined desired temperature curve during the processing.