IP Library › Granted Patent US 6,936,852
Granted Patent B2
US 6,936,852 · App. 10/410,741 · Granted Aug 30, 2005

Semiconductor light emitting device and method for manufacturing same

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Quick Facts
Patent No.
US 6,936,852
App. No.
10/410,741
Granted
Aug 30, 2005
Kind
B2
Abstract

A semiconductor light emitting device ensuring a uniform color tone comprises a semiconductor light emitting element that emits light of a first wavelength upon injection of a current, a fluorescent material portion that contains a fluorescent material excited by light of the first wavelength to emit light of a second wavelength, and a diffuser mixed in an appropriate material around the semiconductor light emitting element.

Claims (5)

1. A semiconductor light emitting device comprising:

a semiconductor light emitting element which emits light of a first wavelength when a current is injected thereto; and

a sealing resin which contains in mixture a fluorescent material and a diffuser, said fluorescent material being excited by light of the first wavelength to emit light of a second wavelength, and weight % concentration of said diffuser in said sealing resin is in the range from 0.5% to 5.0%.

2. The semiconductor light emitting device according to claim 1 wherein said diffuser contains at least one of calcium carbonate, silica, SiO 2 and Al 2 O 3 .

3. The semiconductor light emitting device according to claim 2 wherein said sealing resin is made of silicone resin.