Light emitting device, electrode structure, light emitting device package, and lighting system
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United States of America Patent
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Jan 30, 2018
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app pub date -
Oct 4, 2016
filing date -
Mar 22, 2010
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Abstract
Provided are a light emitting device, an electrode structure, a light emitting device package, and a lighting system. The light emitting device includes a light emitting structure layer comprising a first semiconductor layer, a second semiconductor layer, and an active layer. An electrode disposed on a top surface of the first semiconductor layer, a first layer includes a transmittive oxide material between the top surface of the first semiconductor layer and the electrode, and a second layer disposed is disposed between the first layer and the electrode, wherein the first layer is formed in a different material from the second layer, wherein the electrode comprises a lower portion connected to the first semiconductor layer and an upper portion on a top surface of the second layer.
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