Patent ID: 7186579
Filing Date: 2007-03-06
Classification: B82Y,H01S

Abstract:
1. A method for producing a group III nitride compound semiconductor laser including a laser cavity and multiple layers, comprising group III nitride compound semiconductors and deposited on a substrate, comprising: forming a first layer of a group III nitride compound semiconductor material functioning substantially as a guide layer to an active layer; forming a second layer of a group III nitride compound semiconductor material having a smaller refractive index compared with said first layer and being disposed above or on said first layer; forming a third layer of a group III nitride compound semiconductor material, which is formed between said first layer and said second layer or into said second layer and has a larger composition ratio of aluminum (Al) compared with the second layer, etching multiple layers to provide said laser cavity of a first width, and forming a carrier injection part on said laser cavity part by further etching at least layers above said third layer, corresponding to a second width of an electrode formed above said second layer, said second width being less than said first width, said etching being stopped by said third layer.