Patent ID: 7271019

Claim:
A method of manufacturing a semiconductor laser device comprising: depositing a first cladding layer over a substrate; depositing an active region on said first cladding layer; depositing a second cladding layer on said active region; removing a portion of each of said first cladding layer, said active region and said second cladding layer to form a mesa region having a top portion and a side portion, such that all of said first cladding layer that extends beyond said active region and said second cladding layer of said mesa region is removed to thereby enhance heat dissipation capability through the substrate; depositing an insulator layer on the side portion of said mesa region; and depositing a metal layer to cover the top portion of said mesa region and said insulator layer which is dimensioned and configured to have a thickness at least half a thickness of said mesa region and to laterally spread heat away from said active region.