Title:
LIGHT EMITTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/155294
Kind Code:
A1
Abstract:
An embodiment of the present invention relates to a light emitting device capable of enhancing ohmic characteristics of a semiconductor layer and an electrode and simultaneously improving driving voltage, comprising: a support substrate; a light emitting structure which is disposed on the support substrate and comprises a first semiconductor layer, a second semiconductor layer and an active layer disposed between the first semiconductor layer and the second semiconductor layer; at least one groove which exposes the first semiconductor layer through the second semiconductor layer and the active layer; a first electrode which is disposed between the light emitting structure and the support substrate and electrically connected to the exposed first semiconductor layer; a second electrode which comprises ITO and contacts the second semiconductor layer; and a capping layer which is electrically connected, between the first electrode and the light emitting structure, to the second electrode, wherein the capping layer comprises a first layer, which is disposed facing the second semiconductor layer, with the second electrode interposed therebetween and comprises a material having a thermal expansion coefficient different from the thermal expansion coefficient of the second semiconductor layer by 3 or less.
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Inventors:
CHOI KWANG YONG (KR)
KIM MIN SUNG (KR)
PARK SU IK (KR)
SUNG YOUN JOON (KR)
LEE YONG GYEONG (KR)
KIM MIN SUNG (KR)
PARK SU IK (KR)
SUNG YOUN JOON (KR)
LEE YONG GYEONG (KR)
Application Number:
PCT/KR2017/002487
Publication Date:
September 14, 2017
Filing Date:
March 08, 2017
Export Citation:
Assignee:
LG INNOTEK CO LTD (KR)
International Classes:
H01L33/36; H01L33/38; H01L33/40; H01L33/62
Foreign References:
| KR20140009649A | 2014-01-23 | |||
| JP2014195055A | 2014-10-09 | |||
| EP2728631A1 | 2014-05-07 | |||
| KR20130112330A | 2013-10-14 | |||
| JP2015177023A | 2015-10-05 |
Attorney, Agent or Firm:
DANA PATENT LAW FIRM (KR)
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