Patent ID: 8653555

Claim:
A vertical light-emitting diode, comprising: a heat dissipation substrate; a first electrode, formed on a surface of the heat dissipation substrate; a second electrode, formed on the other surface of the heat dissipation substrate; a welding metal layer, formed on the second electrode; a third electrode, formed on the welding metal layer; a semiconductor light-emitting layer, formed on a central region of the third electrode, for emitting light; a barrier for the semiconductor light-emitting layer, formed on a peripheral region of the third electrode, wherein, the barrier surrounds the semiconductor light-emitting layer, an isolation trench is provided between the barrier and the semiconductor light-emitting layer to isolate the semiconductor light-emitting layer from the barrier fully, the isolation trench exposes the third electrode at its bottom; and the barrier has a structure the same as the semiconductor light-emitting layer; and a fourth electrode, formed only on the semiconductor light-emitting layer.