Patent ID: 8022387

Claim:
A semiconductor device having a layered structure of semiconductor layers, said semiconductor device comprising: a light-emitting layer of a first conductivity type, a second conductivity type or a non-doped type; a first contact layer of said second conductivity type disposed above said light-emitting layer, said first contact layer directly contacting and being connected to an anode electrode of a thyristor structure and being supplied with a voltage; a second contact layer of said second conductivity type disposed below said light-emitting layer, said second contact layer directly contacting and being connected to a gate electrode of said thyristor structure and being supplied with a voltage; a first etching stopper layer of said first or second conductivity type disposed below said light-emitting layer and above said second contact layer, said first etching stopper layer being composed of a material different from said second contact layer and allowing selective etching for said second contact layer, and a third contact layer of said first conductivity type disposed below said second contact layer, said third contact layer directly contacting and being connected to a cathode electrode of said thyristor structure and being supplied with a voltage.