Patent ID: 8405102

Claim:
A light emitting device, comprising: a support member; a light emitting structure on the support member and including a first conductive semiconductor layer, a second conductive semiconductor layer, and an active layer interposed between the first conductive semiconductor layer and the second conductive semiconductor layer, wherein the active layer includes: a light emitting layer in which a plurality of quantum well layers and a plurality of barrier layers are alternately formed, a potential barrier layer provided located between the light emitting layer and the first conductive semiconductor layer, the potential barrier layer configured to delay a time during which an electrostatic discharge (ESD) proceeds from the first conductive semiconductor layer to the light emitting layer, and an undoped barrier layer provided between the light emitting layer and the potential barrier layer, the undoped barrier layer arranged to isolate the potential barrier layer and the light emitting layer from each other; a potential compensation layer configured to compensate for a forward voltage drop due to the potential barrier layer; and a second undoped barrier layer provided between the potential compensation layer and the light emitting layer, the second undoped barrier layer arranged to isolate the potential compensation layer and the light emitting layer from each other.