Patent ID: 7141828

Claim:
A p-type contact for flip chip bonding and electrically contacting a p-type group III-nitride layer of a group III-nitride flip chip light emitting diode die with a bonding pad, the p-type contact including: a first palladium layer disposed on the p-type group III-nitride layer, the first palladium layer being diffused through a native oxide of the p-type group III-nitride layer to make electrical contact with the p-type group III-nitride layer; a reflective silver layer disposed on the first palladium layer; a second palladium layer disposed on the silver layer; and a bonding stack including at least three layers disposed on the second palladium layer, the bonding stack being adapted for flip chip bonding the p-type layer to the bonding pad, the bonding stack including a titanium adhesion layer, a gold bonding layer, and a diffusion barrier layer disposed between the adhesion layer and the bonding layer; wherein the p-type contact does not include a dielectric layer disposed between the reflective silver layer and the bonding stack.