AlInGaN light-emitting device

Active solid-state devices (e.g. – transistors – solid-state diode – Thin active physical layer which is – Heterojunction

Reexamination Certificate

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C257S079000

Reexamination Certificate

active

07858962

ABSTRACT:
A semiconductor light-emitting device fabricated in the (Al,Ga,In)N materials system has an active region for light emission (3) comprising InGaN quantum dots or InGaN quantum wires. An AlGaN layer (6) is provided on a substrate side of the active region. This increases the optical output of the light-emitting device. This increased optical output is believed to result from the AlxGa1-xN layer serving, in use, to promote the injection of carriers into the active region.

REFERENCES:
patent: 2005/0116215 (2005-06-01), Hooper et al.
patent: 2006/0244002 (2006-11-01), Hooper et al.
patent: 2009/0179191 (2009-07-01), Smith et al.
patent: 10-215029 (1998-08-01), None
patent: 11-126949 (1999-05-01), None
UK Search Report for corresponding application No. GB 0800742.9 dated Apr. 27, 2008.
Y K Su et al., “InGaN/GaN blue light-emitting diodes with self-assembled quantum dots”, Semiconductor Science and Technoogy 19 (2004) p. 389-392.
Y. H. Luo et al., “Photoluminescence of InAs Quantum Dots Coupled to a Two-dimensional Electron Gas”, Journal of Electronic Materials, vol. 30, No. 5, 2001, p. 459-462.
T. Egawa et al. “High Performance of InGaN LEDs on (111) Silicon Substrates Grown by MOCVD” IEEE Electron Device Letters, vol. 26, No. 3, Mar. 2005, p. 169-171.

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