Patent ID: 7192884
Filing Date: 2007-03-20
Classification: H01S

Abstract:
1. A method for manufacturing a semiconductor laser device, comprising the steps of: (a) sequentially forming a first conductive-type clad layer, an active layer, and a second conductive-type clad layer, on a first conductive-type semiconductor substrate; (b) forming a ridge structure by selectively etching the second conductive-type clad layer; (c) forming a current blocking layer around the ridge structure, said current blocking layer having protrusions on the upper surface thereof adjacent to the ridge structure, and having at least one of an amorphous and polycrystalline layer on a partial area thereof; (d) wet-etching the upper surface of the current blocking layer, so that at least one of the amorphous and polycrystalline layer is removed from the current blocking layer and the protrusions are reduced in size; and (e) forming a second conductive-type contact layer on the upper surface of the current blocking layer.