Patent ID: 9335262
Filing Date: 2016-05-10
CPC Classification: B82Y,G01N,G02B,H01S

Claim Text:
1. A method of making a device, comprising: epitaxially growing a layer stack including one or more reflective layers and one or more interstitial layers, each interstitial layer disposed between two reflective layers; and forming vias that intersect at least some of the one or more reflective layers and the one or more interstitial layers; exposing the interstitial layers to an etchant through the vias; etching the interstitial layers; detecting a color of the surface of the device, a reflectivity of the device, or both a color of the surface of the device and a reflectivity of the device; and controlling the etching based on the detected color, the detected reflectivity, or both the detected color and the detected reflectivity.