Patent ID: 7704764

Claim:
A fabrication method of GaN power LED with electrodes formed by composite optical coatings, characterized by comprising the steps of: a) epitaxially growing an N—GaN layer, an active layer, a P—GaN layer successively on a substrate; b) depositing a mask layer on the P—GaN layer by a PECVD process; c) coating the mask layer with photoresist, and then etching the mask layer into an N—GaN electrode pattern by photolithography process and wet etching; d) removing the remaining portion of the photoresist, and then forming an N—GaN electrode region by etching through the N—GaN electrode pattern by ICP dry etching; e) removing the remaining portion of the mask layer by wet etching process, and then cleaning; f) simultaneously forming a transparent and electrically conductive film on both the P—GaN layer and the N—GaN electrode region by photolithography process and electron beam evaporation, and then forming a P—GaN transparent and electrically conductive electrode and an N—GaN transparent and electrically conductive electrode by lift-off; g) forming bonding pad patterns for a P—GaN electrode and an N—GaN electrode on the P—GaN transparent and electrically conductive electrode and the N—GaN transparent and electrically conductive electrode by photolithography process, and then simultaneously forming bonding pad regions for the P—GaN electrode and the N—GaN electrode on the bonding pad patterns for the P—GaN electrode and the N—GaN electrode by stepped electron beam evaporation; h) performing alloying treatment on the bonding pad regions for the P—GaN electrode and the N—GaN electrode; i) forming an antireflection film pattern by photolithography process; j) forming an antireflection film through the antireflection film pattern of the device; k) thinning and polishing the backside of the substrate, and then forming a reflector on it; l) completing the process after scribing, packaging and testing.