Light-emitting diode having light reflecting layer

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

1990-11-20

1992-07-21

Mintel, William

Coherent light generators

Particular component circuitry

Optical pumping

357 16, 357 4, 357 52, 372 45, 372 44, 372 49, H01L 3300

Patent

active

051327503

ABSTRACT:
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 include one or more reflecting layers 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.

REFERENCES:
patent: 4943970 (1990-07-01), Bradley
patent: 4949350 (1990-08-01), Jewell et al.
patent: 4993036 (1991-02-01), Ikeda et al.
patent: 4999842 (1991-03-01), Huang et al.
patent: 5040044 (1991-08-01), Noguchi
Journal of Vacuum Science and Technology: Part B., vol. 1, No. 1, Jan. 1983, New York US, pp. 72-73; A. K. Chin et al.: "A1203 As An Antireflection Coating For inP/InGaAsP LEDs".

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