Patent ID: 6801559
Filing Date: 2004-10-05
Classification: B82Y,H01S

Abstract:
A group III nitride compound semiconductor laser including a laser cavity and multiple layers, which are comprised of group III nitride compound semiconductors and deposited on a substrate, comprising:a first layer of a group III nitride compound semiconductor material functioning substantially as a guide layer to an active layer; 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; 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, said laser cavity being formed by etching multiple layers to provide said laser cavity of a first width, and a carrier injection part formed 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, wherein etching is stopped at said third layer.