Patent ID: 6366018
Filing Date: 2002-04-02
Classification: H01L

Abstract:
An apparatus, comprising:a substrate; an active region coupled to said substrate and including a plurality of device layers and an active layer, said active region configured to emit light having a first band of wavelengths from a first group of wavelengths; a phosphor layer being disposed between said active region and an exterior medium, said phosphor layer being configured to convert the first band of wavelengths of light emitted from said active region to a second band of wavelengths, a center wavelength of the second band of wavelengths being greater than a center wavelength of the first band of wavelengths; and a reflective layer being optically coupled to said active region, said active region being disposed between said reflective layer and said phosphor layer, said reflective layer being configured to reflect at least the first band of wavelengths and the second band of wavelengths; wherein, at least one of said device layers, active layer and substrate includes a first side, second side and at least one sidewall inclined from said second side at an angle, each said at least one layer has its own first refraction index, the sidewall of the at least one layer is adjacent to and in contact with said exterior medium having a second refractive index, and the angle, for each layer from the at least one layer, is not greater than ninety degrees minus arcsin of the second refractive index divided by the first refractive index of that layer.