Patent ID: 6798807
Filing Date: 2004-09-28
Classification: H01L,H01S

Abstract:
A semiconductor laser, comprising:a light-emitting unit, an anode area and a cathode area formed over a semiconductor substrate; a high-resistance layer formed over the semiconductor substrate; a first semiconductor layer of first conductivity type formed over the high-resistance layer; an active layer formed over the first semiconductor layer; a second semiconductor layer of second conductivity type corresponding to conductivity type opposite to the first conductivity type, the second semiconductor layer being formed over the active layer; a first isolation trench which divides the second semiconductor layer and the active layer between the light-emitting unit and a cathode area; a bottom of said first isolation trench is between the second conductivity type semiconductor layer bottom and the first conductivity type semiconductor layer bottom; a second isolation trench which divides the first and second semiconductor layers and the active layer between the light-emitting unit and an anode area; a bottom of said second isolation trench is under the first conductivity type semiconductor layer; an insulating film having an opening, which is formed over the second semiconductor layer; a first electrode formed over the insulating film in the light-emitting unit and electrically connected to the second semiconductor layer; a second electrode formed over the insulating film in the cathode area and electrically connected to the first semiconductor layer; and a third electrode formed over the insulating film in the anode area and electrically connected to the first electrode.