Patent ID: 8030102

Claim:
A method for fabricating a plurality of individual light emitting diode units, comprising: providing a sapphire substrate; forming a GaN epitaxial layer on the sapphire substrate; forming a plurality of exhaust trenches on the GaN epitaxial layer, wherein the exhaust trenches define a plurality of individual light emitting diode units; forming a reflective layer on the GaN epitaxial layer; attaching the reflective layer to a conductive substrate; removing the sapphire substrate from the GaN epitaxial layer via a laser lift-off process, wherein a gas produced during the laser lift-off process is exhausted via the exhaust trenches; and dicing the conductive substrate along the exhaust trenches to form the plurality of individual light emitting diode units; wherein formation of the reflective layer comprises depositing a reflective layer on the GaN epitaxial layer using plasma-enhanced chemical vapor deposition.