AlGaAs/GaAs lens-shaped LED with high efficiency and narrow field pattern

Gyuseong Cho; Young-Se Kwon

doi:10.1117/12.131245

23 October 1992 AlGaAs/GaAs lens-shaped LED with high efficiency and narrow field pattern

Gyuseong Cho, Young-Se Kwon

Proceedings Volume 1813, Optoelectronic Component Technologies; (1992) https://doi.org/10.1117/12.131245
Event: International Symposium on Optoelectronics in Computers, Communications, and Control, 1992, Hsinchu, Taiwan

Abstract

The new LED structure suitable for high power and narrow beam pattern is proposed composed of microlens and LED layer. The microlens is fabricated by the meltback etching and regrowth technique in LPE. To control the shape of microlens, meltback etching and regrowth technique is studied and nearly ideal hemisphere is obtained. The characteristics of the proposed LED structure is calculated based upon ray-tracing method. And the fabricated result is discussed.

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Gyuseong Cho and Young-Se Kwon "AlGaAs/GaAs lens-shaped LED with high efficiency and narrow field pattern", Proc. SPIE 1813, Optoelectronic Component Technologies, (23 October 1992); https://doi.org/10.1117/12.131245

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KEYWORDS

Light emitting diodes

Etching

Photons

Gallium

Microlens

Absorption

Photoresist materials

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