Surface textured LEDs and method for making the same

Details Surface textured LEDs and method for making the same Surface textured LEDs and method for making the same

2011-07-12

2011-07-12

Nguyen, Cuong Q (Department: 2811)

Active solid-state devices (e.g., transistors, solid-state diode

Incoherent light emitter structure

With particular semiconductor material

C257S079000, C257S095000

Reexamination Certificate

active

07977702

ABSTRACT:
A light-emitting device that includes an LED and a light extraction layer and the method for making the same are disclosed. The LED includes a substrate on which an active layer is sandwiched between a p-type layer and an n-type layer, the active layer generating light in a band of wavelengths about a central wavelength when holes and electrons recombine therein. The n-type layer, active layer, and p-type layer are formed on the substrate. First and second electrodes for providing a potential difference between the p-type layer and the n-type layer are included in the LED. The light extraction layer includes a clear layer of material having a first surface in contact with a surface of the LED and a second surface having light scattering features with dimensions greater than 0.5 times the central wavelength. The material of the clear layer can be polycrystalline or amorphous.

REFERENCES:
patent: 2004/0012980 (2004-01-01), Sugiura et al.
patent: 2005/0277218 (2005-12-01), Nakajo et al.
patent: 2006/0145170 (2006-07-01), Cho
patent: 2006/0186424 (2006-08-01), Fujimoto et al.

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