Patent ID: 9324624
Filing Date: 2016-04-26
CPC Classification: H01L

Claim Text:
1. A method of fabricating a photonic apparatus, comprising: roughening a surface of the photonic apparatus, the roughening being performed using a plurality of process parameters, wherein the photonic apparatus being a wafer containing light-emitting diodes (LEDs) that each include an exposed epi-layer, and wherein the roughening comprises roughening a surface of the exposed epi-layer surrounded by a wall formed from the epi-layer; thereafter measuring a surface roughness of the light-emitting diodes; comparing the measured surface roughness to a target surface roughness: and repeating the roughening to the photonic apparatus if a first difference between the measured surface roughness and the target surface roughness or a second difference between the target surface roughness and the measured surface roughness exceeds a non-zero predetermined threshold, wherein the repeating the roughening is performed using adjusted process parameters.