Nichia Corporation

Kazuhiko Sakai

Motokazu Yamada

Hiroto Tamaki

Kensho Sakano

Masatoshi Kameshima

Takahiro Naitou

Yuji Okada

Toshihiko Umezu

Yoshinori Murazaki

Suguru Takashima

To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LMN:R or LMON:R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu.); contains the another elements.

Nitride phosphor and production process thereof, and light emitting device

To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LMN:R or LMON:R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu); contains the another elements.

A method for producing a fluorescent material involving firing a mixture of a stock material and a flux. The method may involve a first firing process involving firing the mixture of the stock material and the flux in a weakly reducing atmosphere, followed by firing the resulting material in a second reducing atmosphere that is more reducing than the first weakly reducing atmosphere. The flux may include a liquid.

Light emitting diode, optical semiconductor device, epoxy resin composition and phosphor suited for optical semiconductor device, and method for manufacturing the same

A light emitting diode comprising an LED chip having a light emitting layer made of a nitride compound semiconductor and a light transmitting resin that includes a fluorescent material which absorbs at least a part of light emitted by the LED chip and emits light of a different wavelength, wherein the fluorescent material includes a fluorescent particles of small particle size and a fluorescent particles of large particle size, the fluorescent particles of large particle size being distributed in the vicinity of the LED chip in the light transmitting resin to form a wavelength converting layer, the fluorescent particles of small particle size being distributed on the outside of the wavelength converting layer in the light transmitting resin.

Light emitting diode, optical semiconductor device, epoxy resin composition suited for optical semiconductor device, and method for manufacturing the same

Light emitting diode, optical semiconductor element and epoxy resin composition suitable for optical semiconductor element and production methods therefor

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Anan, Japan

Kazuhiko Sakai