Patent ID: 8754438

Claim:
An LED, comprising: a substrate, having a top face and a bottom face; a buffer layer, disposed on the top face of the substrate; an epitaxial layer, disposed on the buffer layer, comprising: a first N-type epitaxial layer and a second N-type epitaxial layer; a blocking layer, having patterned grooves, sandwiched between the first and the second N-type epitaxial layers, wherein the first and the second N-type epitaxial layers contacts to each other via a portion of the second N-type epitaxial layer in the patterned grooves; a light emitting layer, disposed on the second N-type epitaxial layer; and a P-type epitaxial layer, disposed on the light emitting layer; a conductive layer, disposed on the P-type epitaxial layer; a P-type electrode disposed on the conductive layer; and an N-type electrode disposed on the blocking layer opposite to the P-type electrode, wherein the N-type electrode is separated from the second N-type epitaxial layer and has a portion extending into the patterned grooves to contact with the first N-type epitaxial layer.