White LED and manufacturing method therefor

Details White LED and manufacturing method therefor White LED and manufacturing method therefor

2006-02-09

2010-06-15

Nguyen, Kimberly D (Department: 2894)

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

Incoherent light emitter structure

With housing or contact structure

C257SE33058, C257SE25005

Reexamination Certificate

active

07737460

ABSTRACT:
A white LED includes an LED chip formed on one main surface of a sapphire substrate, the LED chip being formed in a semiconductor stack structure including a light emitting layer and emitting light of a predetermined wavelength, a light extracting film applied on the other main surface of the substrate, the light extracting film being formed of a material having a refractive index within a range of ±5% of a refractive index of the substrate and a surface of the light extracting film that is located on an opposite side to the substrate being processed into a recess and projection shape, and a phosphor member provided on an opposite side of the substrate with respect to the light extracting film, and generating white light as light is incident thereon.

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