Patent ID: 7606281
Filing Date: 2009-10-20
Classification: H01S

Abstract:
1. A method for producing a multi-wavelength semiconductor laser device, comprising the steps of: preparing a substrate for growth of a nitride single crystal thereon; sequentially growing a first conductivity-type first clad layer, a first active layer and a second conductivity-type first clad layer on the substrate, to form a nitride epitaxial layer; separating the nitride epitaxial layer from the substrate; attaching the separated nitride epitaxial layer to a first conductivity-type substrate; selectively removing the nitride epitaxial layer such that a portion of the substrate is exposed, to form a first semiconductor laser structure; sequentially growing a first conductivity-type second clad layer, a second active layer and a second conductivity-type second clad layer on the exposed portion of the first conductivity-type substrate, to form a second semiconductor laser structure separated from the first semiconductor laser structure; sequentially growing a first conductivity-type third clad layer, a third active layer and a second conductivity-type third clad layer on the remaining portion of the first conductivity-type substrate, to form a third semiconductor laser structure separated from the first and second semiconductor laser structures; and forming a first electrode connected to a bottom surface of the first conductivity-type substrate and forming second electrodes connected to the respective second conductivity-type clad layers of the first, second and third semiconductor laser structures.