Abstract: Disclosed is a fluorescent substance comprising an alkaline earth ortho-silicate, the fluorescent substance being activated by Eu2+, and further comprising at least one selected from the group consisting of La, Gd, Cs and K.

Abstract: An field effect transistor includes a first semiconductor region, a gate electrode insulatively disposed over the first semiconductor region, source and drain electrodes between which the first semiconductor region is sandwiched, and second semiconductor regions each formed between the first semiconductor region and one of the source and drain electrodes, and having impurity concentration higher than that of the first semiconductor region, the source electrode being offset to the gate electrode in a direction in which the source electrode and the drain electrode are separated from each other with respect to a channel direction, and one of the second semiconductor regions having a thickness not more than a thickness with which the one of second semiconductor regions is completely depleted in the channel direction being in thermal equilibrium with the source electrode therewith.

Abstract: According to an aspect of the present invention, there is provided a fuel cell including: a membrane electrode assembly including: an electrolyte membrane; anode and cathode catalyst layers respectively disposed on the electrolyte membrane; and anode and cathode gas diffusion layers respectively disposed on the anode and cathode catalyst layers; a cathode porous body including a front face portion and a rear face portion and being disposed on the cathode gas diffusion layer at the front face portion, the front face portion having an electric conductivity higher than that of air and having a hydrophilicity higher than that of the rear face portion; an anode passage plate disposed on the anode gas diffusion layer; and an air supply apparatus that supplies air toward an end of the cathode porous body.

Abstract: A semiconductor light emitting element includes a semiconductor light emitting element emitting light beams in ultraviolet ranges and visible ranges, and a fluorescent element absorbing the light beams from the semiconductor light emitting element and outputting visible light beams in a light taking-out direction different from a light emitting direction. The light beams emitted from the light emitting element are absorbed within the semiconductor light emitting device.

Abstract: A light emitting device includes a light emitting element and a luminescent medium. The luminescent medium contains a rare earth complex wherein a compound represented by the following formula (1) is employed as a ligand: wherein X and Y are the same or different and are individually O, S or Se; R1, R2, R3 and R4 are the same or different, excluding a situation where R1, R2, R3 and R4 are all the same as each other, and are individually an alkyl or alkoxy group of a linear or branched structure having not more than 20 carbon atoms, a phenyl group, a biphenyl group, a naphthyl group, a heterocyclic group or a substitution product of any of these groups; n is an integer ranging from 2 to 20; and Z and W are the same or different and are individually a hydrogen atom, a deuterium atom, a halogen atom or an alkyl group.

Abstract: A light emitting apparatus 1 comprises: a semiconductor light emitting element 2; and a transparent ceramic phosphor 11 for converting a wavelength of a light emitted from the semiconductor light emitting element 2, wherein the semiconductor light emitting element 2 emits an ultraviolet light, and the ceramic phosphor 11 corresponding to the semiconductor light emitting element 2 has: a minimum transmission of 0.1 to 40% under a wavelength of 350-420 nm; and a transmission of 10 to 90% under an emission peak wavelength of the ceramic phosphor.

Abstract: Disclosed is a fluorescent substance comprising an alkaline earth ortho-silicate, the fluorescent substance being activated by Eu2+, and further comprising at least one selected from the group consisting of La, Gd, Cs and K.

Abstract: Disclosed is a fluorescent substance comprising an alkaline earth ortho-silicate, the fluorescent substance being activated by Eu2+, and further comprising at least one selected from the group consisting of La, Gd, Cs and K.

Abstract: An field effect transistor includes a first semiconductor region, a gate electrode insulatively disposed over the first semiconductor region, source and drain electrodes between which the first semiconductor region is sandwiched, and second semiconductor regions each formed between the first semiconductor region and one of the source and drain electrodes, and having impurity concentration higher than that of the first semiconductor region, the source electrode being offset to the gate electrode in a direction in which the source electrode and the drain electrode are separated from each other with respect to a channel direction, and one of the second semiconductor regions having a thickness not more than a thickness with which the one of second semiconductor regions is completely depleted in the channel direction being in thermal equilibrium with the source electrode therewith.

Abstract: Disclosed is a method for manufacturing a nitrogen-containing fluorescent substance comprising accommodating an oxide fluorescent substance containing two or more elements in a receptacle made of a material containing carbon, and sintering the oxide fluorescent substance in a mixed gas atmosphere containing nitrogen gas.

Abstract: Disclosed is a method for manufacturing a nitrogen-containing fluorescent substance comprising accommodating an oxide fluorescent substance containing two or more elements in a receptacle made of a material containing carbon, and sintering the oxide fluorescent substance in a mixed gas atmosphere containing nitrogen gas.

Abstract: A light emitting device includes a light emitting element emitting an excitation light and a fluorescent element. The fluorescent element includes a semi-translucent film facing the light emitting element, and transmits the excitation light; a first luminescent film including phosphors to absorb the excitation light transmitted through the semi-translucent film and to emit a visible light having a different wavelength than the excitation light; and a reflection film disposed on an opposite side of the first luminescent film on which the semi-translucent film is disposed, reflecting the excitation light transmitted through the first luminescent film towards the first luminescent film.

Abstract: A europium-activated alkaline earth orthosilicate luminescent material is provided, which includes a compound having a composition represented by a following formula 1: (Srx Bay Caz Euw)2SiO4??formula 1 wherein, x, y, z and w satisfy following relational expressions 2, and 4 to 7, and are values satisfying the expression 3 when a, b, c and d are assumed to be 573, 467, 623 and 736, respectively: x+y+z+w=1??expression 2 600?ax+by+cz+dw??expression 3 0?x/(1?w)?0.95??expression 4 0?y/(1?w)?0.4??expression 5 0<z/(1?w)?0.95??expression 6 0.02?w?0.2??expression 7 the luminescent material shows an emission band having a peak wavelength of 600 nm or more when the luminescent material is excited by ultraviolet radiation having a wavelength of 254 nm.

Abstract: A light emitting device includes a light emitting element and a luminescent medium. The luminescent medium contains a rare earth complex wherein a compound represented by the following formula (1) is employed as a ligand: wherein X and Y are the same or different and are individually O, S or Se; R1, R2, R3 and R4 are the same or different, excluding a situation where R1, R2, R3 and R4 are all the same as each other, and are individually an alkyl or alkoxy group of a linear or branched structure having not more than 20 carbon atoms, a phenyl group, a biphenyl group, a naphthyl group, a heterocyclic group or a substitution product of any of these groups; n is an integer ranging from 2 to 20; and Z and W are the same or different and are individually a hydrogen atom, a deuterium atom, a halogen atom or an alkyl group.

Abstract: A light-emitting device is provided, which includes a substrate having a plane surface, a semiconductor light-emitting element mounted on the plane surface of the substrate and which emits light in a range from ultraviolet ray to visible light, a first light transmissible layer formed above the substrate and covering the semiconductor light-emitting element, a phosphor layer formed above the first light transmissible layer and containing phosphor particles and matrix, and a second light transmissible layer formed above the phosphor layer and contacting with the plane surface of the substrate. The surface of the phosphor layer has projections reflecting shapes of the phosphor particles.

Abstract: A light emitting device includes a light emitting element and a luminescent medium. The luminescent medium contains a rare earth complex wherein a compound represented by the following formula (1) is employed as a ligand: wherein X and Y are the same or different and are individually O, S or Se; R1, R2, R3 and R4 are the same or different, excluding a situation where R1, R2, R3 and R4 are all the same as each other, and are individually an alkyl or alkoxy group of a linear or branched structure having not more than 20 carbon atoms, a phenyl group, a biphenyl group, a naphthyl group, a heterocyclic group or a substitution product of any of these groups; n is an integer ranging from 2 to 20; and Z and W are the same or different and are individually a hydrogen atom, a deuterium atom, a halogen atom or an alkyl group.

Abstract: A light-emitting device is provided, which includes a substrate, a light-emitting element configured to emit light having a first wavelength, the light-emitting element having a pair of electrodes and being formed above the substrate, a metal layer interposed between the substrate and the light-emitting element and having a planar configuration, and a wavelength converting layer formed on the metal layer. The periphery of the metal layer is at least partially constituted by a plurality of projected portions and a plurality of recessed portions. The plurality of projected portions locates outside of the light-emitting element. The wavelength converting layer absorbs at least part of the light emitted from the light-emitting element and converts the first wavelength, thereby light having a second wavelength differing in wavelength from the first wavelength is emitted.

Abstract: Disclosed is a fluorescent substance comprising an alkaline earth metal silicate having a composition represented by the following general formula (1): (Sr1-x-y-zBaxCayEuz)2SiwO2+2w ??(1) where x, y, z and w fall within the ranges of: 0?x?0.97; 0?y?0.97; 0.03?z?0.20; 1.00<w 1.10.

Abstract: A light-emitting device is provided, which includes a supporting member, a light-emitting element disposed on the supporting member to emit a light, the light-emitting element having a semiconductor substrate and a polygonal top surface, an electrode pad formed on the top surface of the light-emitting element, a first lead electrode formed on the supporting member, a conductive wire connecting the electrode pad with the first lead electrode, the conductive wire being arranged to pass over one of corners of the polygonal top surface of the light-emitting element and along a ridge formed contiguous to the one of corners and corresponding to a boundary between neighboring side surfaces of the light-emitting element, and a fluorescent layer containing a light-transmitting member and a fluorescent substance.

Abstract: According to the present invention, a resist resin having in its structure a specific bridged-bond-containing aliphatic ring, and a resist composition comprising the same are provided. By using this resist composition, a resist pattern excellent in both transparency against short-wavelength light and dry-etching resistance can be formed by alkali development with high resolution.