Improved transparent substrate light emitting diode

Details Improved transparent substrate light emitting diode Improved transparent substrate light emitting diode

H - Electricity

01

L

H01L 33/10 (2010.01) H01L 33/32 (2010.01)

Patent

CA 2412423

A gallium nitride based light emitting diode comprises both a transparent substrate (101) and a window (109) for exiting light generated by the LED. Useful amounts of light may be utilized at the face of the window (109) or at the face of the transparent substrate (101). An external optical reflector (112) is formed directly on the external face of the LED which is not currently being used to exit useful light. If light from the window (109) is being utilized, a Distributed Bragg Reflector, or DBR, (112) is formed directly on the "backside" of the substrate. However, if light through the substrate (101) is being utilized, a DBR (112) is formed directly on the light emitting portion of the window (109).

Cette diode émettrice de lumière, à base de nitrure de gallium, comprend à la fois un substrat transparent (101) et une fenêtre (109) servant à la sortie de la lumière produite par la diode électroluminescente. Il est possible d'utiliser des quantités utiles de lumière au niveau de la face de la fenêtre (109) ou de la face du substrat transparent (101). Un réflecteur optique extérieur (112) est formé directement sur la face extérieure de la diode électroluminescente, lequel n'est généralement pas utilisé pour sortir la lumière utile. Si la lumière sortant de la fenêtre (109) est utilisée, un réflecteur Bragg réparti, ou DBR (112), est formé directement sur le côté arrière du substrat. Cependant si la lumière traversant le substrat (101) est utilisée, un réflecteur Bragg réparti (112) est formé directement sur la portion émettrice de lumière de la fenêtre (109).

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