Nichia Corporation

Shinsuke Sofue

Kunihiro Izuno

Hiroto Tamaki

Junji Takeichi

Shinji Nishijima

Satoshi Okada

Takahiro Amo

Hideyuki Nagai

The present invention provides a reliable, long-life phosphor, or the like, which is prevented from darkening due to aging. A light emitting apparatus has a light emitting element and a phosphor layer. The phosphor layer has a phosphor excited by light from the light emitting element, and a binder which binds the phosphor. The binder is hydroxide oxide gel obtained by curing sol of a hydroxide oxide mixed with sol containing at least one metallic element selected from the group consisting of Al, Y, Gd, Lu, Sc, Ga, In, and B. Transmittance of hydroxide oxide in a gel state is higher than the transmittance in the polycrystal state where the sol-gel reaction is proceeded. In addition, the content of hydroxyl group or water of crystallization in the hydroxide oxide is 10% or less by weight.

Light emitting film, luminescent device, method for manufacturing light emitting film and method for manufacturing luminescent device

The present invention provides a semiconductor device having a coating film of a predetermined thickness provided along the circumference of a semiconductor light emitting element, and provide a method for easily manufacturing the semiconductor device. A semiconductor light emitting elementthat emits blue light is mounted face down on the top face of a pedestal, and a coating filmcontaining a YAG fluorescent materialthat emits yellow light is placed so as to cover the top face and side face of the semiconductor light emitting elementand the top face of the pedestal. With the semiconductor light emitting elementand other elements placed between a first filmand a second film, the films are laminated in vacuum, thereby to fasten the coating filmonto the semiconductor light emitting element. Then the first filmand the second filmare removed, the coating filmis trimmed and the pedestalis diced, thereby to obtain the semiconductor devicehaving the coating filmof a predetermined thickness provided along the circumference of the semiconductor light emitting element

Semiconductor device and method for manufacturing the same

A light emitting device, including a light emitting element, and a resin layer that has been screen printed to coat said light emitting element is provided. The resin layer is formed from a curable silicone resin composition, which includes (i) an organopolysiloxane with a polystyrene equivalent weight average molecular weight of at least 5&#xd7;10, (ii) a condensation catalyst, (iii) a solvent, and (iv) a finely powdered inorganic filler. The uniformity of the film thickness is excellent, thus resulting in little color irregularities during light emission from the light emitting element.

Light emitting device with silicone resin layer formed by screen printing

A light emitting device is provided, including a light emitting element, a package comprised at least partially of metal on which said light emitting element is mounted, and a resin layer coated on said light emitting element. The light emitting element is eutectic bonded to a metal portion of said package, and the resin layer is formed of a cured product of a silicone composition. The composition includes (i) an organopolysiloxane having an average composition formula (1):R(OX)SiO&#x2003;&#x2003;(1)wherein Ris an alkyl, alkenyl or aryl group, X is a hydrogen atom, or an alkyl, alkenyl, alkoxyalkyl or acyl group, a is a number from 1.05 to 1.5, b is a number of 0&#x3c;b&#x3c;2, and 1.05&#x3c;a+b&#x3c;2, and (ii) a condensation catalyst. The device exhibits improved heat resistance and light resistance, and also exhibits improved adhesion to the resins and metal members used.

Growing community of inventors

Anan, Japan

Shinsuke Sofue