Light-emitting diode having light reflecting layer

Details Light-emitting diode having light reflecting layer Light-emitting diode having light reflecting layer

H - Electricity

01

L

345/50

H01L 33/00 (2006.01)

Patent

CA 2030368

A light-emitting diode having a light-generating layer for generating an electromagnetic radiation by electroluminescence, a light-emitting surface through which the radiation is emitted, and a light-reflecting layer remote from the light-emitting surface, for reflecting a portion of the radiation toward the light-generating layer so that the radiation reflected by the light-reflecting layer is also emitted through the light-emitting surface. The light-reflecting layer consists of two or more interference type reflecting layers which includes one or more reflecting layer each capable of most efficiently reflecting a wave whose wavelength is longer than the nominal wavelength of the radiation. The light-emitting surface may have irregularity for irregularly reflecting the radiation, or an anti-reflection layer formed thereon by deposition.

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