US Patent No. 9,893,253

LED WITH SCATTERING FEATURES IN SUBSTRATE


Patent No. 9,893,253
Issue Date February 13, 2018
Title Led With Scattering Features In Substrate
Inventorship Kenneth Vampola, Los Altos, CA (US)
Hans-Helmut Bechtel, Roetgen (DE)
Assignee LUMILEDS LLC, San Jose, CA (US)

Claim of US Patent No. 9,893,253

1. A light emitting device comprising:
light emitting diode (LED) semiconductor layers generating light, the LED semiconductor layers having a light emitting surface;
a substrate overlying the light emitting surface and affixed to the LED semiconductor layers; and
one or more light scattering areas formed within the substrate,
wherein the device comprises inactive areas in the LED semiconductor layers that do not generate light and LED semiconductor
layers areas that generate light, wherein the one or more light scattering areas are located over at least one of the inactive
areas that do not generate light,

wherein the one or more light scattering areas are not substantially formed over the LED semiconductor layers areas that generate
light, and

wherein at least one of the one or more light scattering areas is formed overlying a light absorbing area within or underlying
the LED semiconductor layers.