Patent ID: 7672351

Claim:
A semiconductor laser apparatus comprising: a first semiconductor laser device comprising a first substrate, and a first semiconductor layer formed on said first substrate, said first semiconductor layer having a first emission point emitting a light beam having a first wavelength; a second semiconductor laser device comprising a second semiconductor layer having a second emission point emitting a light beam having a second wavelength; and a third semiconductor laser device comprising a third semiconductor layer having a third emission point emitting a light beam having a third wavelength, a surface of said first semiconductor layer that is opposite to said first substrate including a first region and a second region, said second semiconductor layer being joined to said first region, and said third semiconductor layer being joined to said second region, a striped first projection being provided on said first region, a striped second projection being provided on a surface of said second semiconductor layer being joined to said first region, a striped third projection being provided on a surface of said third semiconductor layer being joined to said second region, a first raised portion being provided apart from said first projection with a recessed portion therebetween on said first region, a second raised portion being provided apart from said second projection with a recessed portion therebetween on said surface of said second semiconductor layer, and the height of said first raised portion being not less than the height of said first projection.