发明名称 |
Light emitting device having a plurality of light emitting cells and method of fabricating the same |
摘要 |
Disclosed is a light emitting device having a plurality of light emitting cells. The light emitting device comprises a thermally conductive substrate, such as a SiC substrate, having a thermal conductivity higher than that of a sapphire substrate. The plurality of light emitting cells are connected in series on the thermally conductive substrate. Meanwhile, a semi-insulating buffer layer is interposed between the thermally conductive substrate and the light emitting cells. For example, the semi-insulating buffer layer may be formed of AIN or semi-insulating GaN. Since the thermally conductive substrate having a thermal conductivity higher than that of a sapphire substrate is employed, heat-dissipating performance can be enhanced as compared with a conventional sapphire substrate, thereby increasing the maximum light output of a light emitting device that is driven under a high voltage AC power source. In addition, since the semi-insulating buffer layer is employed, it is possible to prevent an increase in a leakage current through the thermally conductive substrate and between the light emitting cells. |
申请公布号 |
EP2259318(A2) |
申请公布日期 |
2010.12.08 |
申请号 |
EP20100159433 |
申请日期 |
2005.07.05 |
申请人 |
SEOUL OPTO DEVICE CO., LTD. |
发明人 |
LEE, CHUNG HOON;KIM, HONG SAN;SPECK, JAMES S. |
分类号 |
H01L27/15;H01L33/08;H01L33/12;H01L33/32 |
主分类号 |
H01L27/15 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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