| 摘要 |
<p>PURPOSE: A light emitting device, a light emitting device package, and a light unit are provided to increase external extraction light intensity by using a reflection electrode formed under a light emitting structure. CONSTITUTION: A first light emitting structure(10) comprises a first semiconductor layer(11) of a first conductivity type, a first active layer(12), and a second semiconductor layer(13) of a second conductivity type. A first metal layer(19) is formed under the first light emitting structure. A second light emitting structure(20) comprises a third semiconductor layer(21) of the first conductivity type, a second active region(22), and a fourth semiconductor layer(23) of the second conductivity type. A second metal layer(29) is formed under the second light emitting structure. A second ohmic contact layer(25) and a second reflection electrode(27) are formed under the second light emitting structure.</p> |
