US 11,870,009 B2
Edge structures for light shaping in light-emitting diode chips
Michael Check, Holly Springs, NC (US); Steven Wuester, Wake Forest, NC (US); Justin White, Morrisville, NC (US); and Seth Joseph Balkey, Durham, NC (US)
Assigned to CreeLED, Inc., Durham, NC (US)
Filed by CreeLED, Inc., Durham, NC (US)
Filed on Aug. 6, 2021, as Appl. No. 17/396,160.
Prior Publication US 2023/0037469 A1, Feb. 9, 2023
Int. Cl. H01L 33/24 (2010.01); H01L 33/38 (2010.01); H01L 33/40 (2010.01); H01L 33/46 (2010.01); H01L 33/22 (2010.01); H01L 33/32 (2010.01)
CPC H01L 33/24 (2013.01) [H01L 33/382 (2013.01); H01L 33/405 (2013.01); H01L 33/46 (2013.01); H01L 33/22 (2013.01); H01L 33/32 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A light emitting diode (LED) chip, comprising:
an n-type layer;
a p-type layer;
an active layer arranged between the n-type layer and the p-type layer, wherein the p-type layer, the active layer, and a portion of the n-type layer form an active LED structure mesa with at least one mesa sidewall, wherein the at least one mesa sidewall forms a shape with a repeating pattern along only a first portion of the at least one mesa sidewall such that a second portion of the at least one mesa sidewall is devoid of any repeating pattern; and
a reflective structure on the active LED structure mesa and on the at least one mesa sidewall, wherein the reflective structure is arranged to cover the repeating pattern.