Patent ID: 7566910
Filing Date: 2009-07-28
Classification: H01L

Abstract:
1. A semiconductor light emitting device comprising: a substrate; an n-type semiconductor layer formed on the substrate; an active layer formed on a first region of the n-type semiconductor layer; a p-type semiconductor layer formed on the active layer; a p-type electrode formed on the p-type semiconductor layer; an n-type electrode formed on a second region of the n-type semiconductor layer separated from the first region of the n-type semiconductor layer; a single dielectric layer formed on a sidewall of a stack comprising the p-type semiconductor layer, the active layer, and the n-type semiconductor layer; and a reflective layer formed on the single dielectric layer, wherein a refractive index of the single dielectric layer is 1 to 2.5, wherein a thickness of the single dielectric layer is ¼ the wavelength of light emitted from the active layer, wherein the single dielectric layer and the reflective layer constitute an omnidirectional reflective contract having a predetermined degree of reflectivity regardless of a wavelength of light emitted from the active layer and an angle of the light incident on the sidewall of the stack, and wherein the sidewall of the stack is disposed at an angle of approximately 35 to 55 degrees relative to a plane of the substrate.