US Patent No. 10,172,190

LIGHT EMITTING DIODE HAVING IMPROVED CURRENT SPREADING EFFICIENCY, IMPROVED MECHANICAL RELIABILITY, OR SOME COMBINATION THEREOF


Patent No. 10,172,190
Issue Date January 01, 2019
Title Light Emitting Diode Having Improved Current Spreading Efficiency, Improved Mechanical Reliability, Or Some Combination Thereof
Inventorship Mae Yi Kim, Ansan-si (KR)
Seom Geun Lee, Ansan-si (KR)
Yeo Jin Yoon, Ansan-si (KR)
Jin Woong Lee, Ansan-si (KR)
Yong Woo Ryu, Ansan-si (KR)
Assignee Seoul Viosys Co., Ltd., Ansan-si (KR)

Claim of US Patent No. 10,172,190

1. A light emitting diode, comprising:a light emitting structure comprising a first conductivity type semiconductor layer and a plurality of mesas comprising a second conductivity type semiconductor layer disposed on the first conductivity type semiconductor layer and an active layer interposed between the first conductivity type semiconductor layer and the second conductivity type semiconductor layer, the first conductivity type semiconductor layer comprising an exposed region between the plurality of mesas;
a first electrode disposed on the first conductivity type semiconductor layer and electrically connected to the first conductivity type semiconductor layer;
a current blocking layer disposed on a portion of the plurality of mesas and a portion of the exposed region;
a transparent electrode layer disposed on a portion of the plurality of mesas and a portion of the exposed region, the transparent electrode layer partially covering the second conductivity type semiconductor layer and the current blocking layer; and
a second electrode disposed on the current blocking layer and the transparent electrode layer and electrically connected to the second conductivity type semiconductor layer,
wherein the current blocking layer comprises a connecting portion extending from a first mesa of the plurality of mesas to a second mesa of the plurality of mesas adjacent to the first mesa, and a protruding portion protruding from the connecting portion and disposed on the exposed region.