Patent ID: 8217400

Claim:
A polychromatic light emitting diode device, comprising: a substrate; a multiple semiconductor layer formed on said substrate, wherein said multiple semiconductor layer comprises an n-type semiconductor layer, a p-type semiconductor layer and an active layer disposed between said n-type semiconductor layer and said p-type semiconductor layer, and said active layer emits light of a first wavelength; a first wavelength conversion layer formed on said multiple semiconductor layer, the first wavelength conversion layer having a plurality of indentations, wherein said first wavelength conversion layer is made of semiconductor and absorbs a portion of said light of a first wavelength emitted from said active layer and emits light of a second wavelength, wherein said second wavelength is longer than said first wavelength; and a transparent conductive layer formed on said first wavelength conversion layer, wherein said transparent conductive layer is in direct contact with said multiple semiconductor layer via said plurality of indentations of the first wavelength conversion layer.