Patent ID: 7544971

Claim:
A light-emitting diode, comprising: an insulating substrate; a semiconductor epitaxial structure, wherein the semiconductor epitaxial structure comprises: a first conductivity type semiconductor layer formed on a portion of the insulating substrate; an active layer formed on a portion of the first conductivity type semiconductor layer to expose the other portion of the first conductivity type semiconductor layer; and a second conductivity type semiconductor layer formed on the active layer; a first electrode formed on the exposed portion of the first conductivity type semiconductor layer; a second electrode formed on a portion of the second conductivity type semiconductor layer, electrically coupled to the first electrode; and at least one trench enclosed by the semiconductor epitaxial structure and penetrating through the semiconductor epitaxial structure to form an electrically insulating area such that current is laterally spread within the semiconductor epitaxial structure, wherein the bottom of the trench exposes the insulating substrate.