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US 11,056,616 B2Granted
Semiconductor light emitting device and method of manufacturing semiconductor light emitting device
AssigneeNikkiso Co., Ltd.
InventorHideki Asano
Life of this patent
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Abstract
A semiconductor light emitting device includes: a light emitting part for emitting ultraviolet light; and a coating part that coats a part of an extraction surface from which the ultraviolet light emitted by the light emitting part is extracted. The coating part is comprised of a plurality of isolated parts distanced from each other, and the isolated part is made of a second material having a refractive index that is lower than a refractive index of a first material forming the extraction surface.
Claims13
A semiconductor light emitting device comprising:
- a light emitting part for emitting ultraviolet light;
- and
- a coating part that directly coats a part of an extraction surface from which the ultraviolet light emitted by the light emitting part is extracted, wherein
- the coating part consists of a plurality of isolated parts distanced from each other, and
- the isolated part is made of a second material having a refractive index that is lower than a refractive index of a substrate made of a first material forming the extraction surface,
- wherein a diameter or one side of the isolated part is not less than 1 μm and not more than 100 μm,
- the first material is a sapphire substrate or an aluminum nitride substrate, and
- a percentage of the extraction surface not coated with the coating part is 10˜90%.
5 more elements
A method of manufacturing a semiconductor light emitting device comprising:
- preparing a light emitting part for emitting ultraviolet light;
- and
- printing a coating part directly on an extraction surface from which the ultraviolet light emitted by the light emitting part is extracted, wherein
- the coating part consists of a plurality of isolated parts distanced from each other,
- a diameter or one side of the isolated part is not less than 1 μm and not more than 100 μm,
- the isolated part is made of a resin material having a refractive index that is lower than a refractive index of a substrate material forming the extraction surface,
- the substrate material is a sapphire substrate or an aluminum nitride substrate, and
- a percentage of the extraction surface not coated with the coating part is 10-90%.
5 more elements
Dependencies are inferred from the claim text.