US Patent No. 10,164,155

SEMICONDUCTOR LIGHT EMITTING DEVICE WITH LIGHT EXTRACTION STRUCTURES


Patent No. 10,164,155
Issue Date December 25, 2018
Title Semiconductor Light Emitting Device With Light Extraction Structures
Inventorship Jonathan J. Wierer, San Jose, CA (US)
Aurelien Jean Francois David, San Jose, CA (US)
Henry Kwong-Hin Choy, San Jose, CA (US)
Assignee Lumileds LLC, San Jose, CA (US)

Claim of US Patent No. 10,164,155

1. A light emitting device comprising:a substrate;
a semiconductor structure comprising a light emitting layer disposed between an n-type region and a p-type region and having a first surface adjacent the substrate and a second surface opposite the first surface, the first surface having a plurality of cavities formed therein and extending into at least one of the n-type region and the p-type region, the plurality of cavities being spaced apart and lined by a dielectric layer, at least a portion of the second surface is roughened to form a plurality of features spaced apart at a distance smaller than a distance between each of the plurality of cavities formed in the first surface to enhance extraction of light emitted from the light emitting layer; and
at least one contact disposed between the first surface of the semiconductor structure and the substrate.