Patent ID: 8759859

Claim:
A light-emitting element comprising: a semiconductor substrate; an island structure formed on the semiconductor substrate and including at least a current confining layer and p-type and n-type semiconductor layers; a light-emitting thyristor formed in the island structure and comprising a pnpn structure; and a shift thyristor formed in the island structure and comprising a pnpn structure, wherein the island structure defines n groove portions that are completely surrounded by side surfaces of the island structure so that each groove portion of the n groove portions correspond to holes defined in the island structure, wherein each groove portion of the n groove portions comprises a depth that reaches at least the current confining layer and each groove portion of the n groove portions is formed between a formation region of the shift thyristor of the island structure and a formation region of the light-emitting thyristor, and an oxidized region that is selectively oxidized from a side surface of the island structure and a side surface of the groove portion is formed in the current confining layer.