Patent ID: 6998642

Claim:
A semiconductor structure of series connection of two light emitting diodes, comprising: a first light emitting diode having stack layers from a bottom thereof including a thermal conductive substrate, an nonconductive protective layer, a metal adhering layer, a mirror protective layer, an ohmic contact epi-layer, a upper cladding layer, an active layer, and a lower cladding layer, further, a first ohmic contact metal electrode formed on an interface between said mirror protective layer and said ohmic contact epi-layer and buried in said mirror protective layer, a second ohmic contact metal electrode formed on said lower cladding layer; a second light emitting diode having the same stack layers as said first light emitting diode; still wherein both of said light emitting diodes, respectively, have a first trench formed therein which has a bottom exposed said ohmic contact epi-layer and said trench bottom contains an electrical conductive channel connecting said first ohmic contact metal electrode; an isolation trench formed at a border of said first trench and with a bottom exposed said nonconductive protective layer to isolate said first light emitting diode and said second light emitting diode; a dielectric layer formed to fill in said isolation trench and extend to a sidewall of said first trench, said sidewall being a boundary between said first and said second light emitting diode; and a metal bonding layer formed on said dielectric layer and extended to connect said second ohmic contact metal electrode of said first light emitting diode and said second ohmic contact metal electrode of said second light emitting diode.