摘要:
A ceramic heater 1 includes a silicon nitride ceramic substrate 13 and a resistance-heating member 10 embedded in the silicon nitride ceramic substrate 13 . The silicon nitride ceramic substrate 13 contains oxygen derived from a sintering aid at an average concentration of 0.4–3.2% by weight in a surface layer portion extending from the surface thereof to a depth of 1 mm. The ceramic heater 1 can be manufactured by firing through hot pressing. A firing jig for use in a firing process has an SiC—C composite layer which is formed therein along the surface of cavities thereof while having a predetermined depth as measured from the cavity surface.
摘要:
A ceramic heater is formed by embedding a heating element in a ceramic body. A ceramic body is formed from a sintered basic ceramic component containing an adjustment ceramic component in the range of 1 to 3% by weight. The adjustment ceramic component includes at least one component selected from the group consisting of metal silicate, metal carbonate, metal boride, and metal nitride each of which is larger in thermal expansion coefficient than the basic ceramic component.
摘要:
A ceramic heater includes a silicon nitride ceramic and a heating element embedded in the ceramic. The heating element is formed through use of, as a main component, a silicide, carbide, or nitride of at least one element selected from the group consisting of W, Ta, Nb, Ti, Mo, Zr, Hf, V, and Cr. The ceramic includes, as sintering aids, 1 to 20% by weight of at least one rare earth element calculated as an oxide thereof; 0.5 to 8% by weight of V (vanadium) calculated as V.sub.2 O.sub.5, and, 0.5 to 8% by weight of at least one Va/VIa group element selected from the group consisting of Nb, Ta, Cr, Mo, and W calculated as an oxide thereof. The proportion in total of vanadium and the Va/VIa element is 1 to 10% by weight calculated as oxides. The ceramic heater has excellent high-temperature strength and acid resistance.
摘要:
A light-emitting device according to an embodiment of the present invention includes a light-emitting element, and a package substrate on which this light-emitting element is placed. This package substrate includes a placement face on which the light-emitting element is placed, a back face that is opposed to the placement face, and a mounting face that is opposed, between the placement face and the back face, to a mounting substrate when the light-emitting device is mounted, and includes a first recess portion that extends, on the mounting face, from the back face toward the placement face and that has a first heat conduction member formed on the surface thereof, and an intermediate heat conduction member for conducting heat between the light-emitting element and the first heat conduction member.
摘要:
A light emitting apparatus is provided, and the light emitting apparatus has a light emitting device mounted on a substrate or a resin package where a substrate surface or the resin package is resin-encapsulated by an encapsulating resin section added with a phosphor in such a manner to cover the light emitting device. A surface resin layer of a different color from that of the encapsulating resin section is provided on a surface side of the encapsulating resin section.
摘要:
By using a light emitting device including an insulating substrate and a light emitting unit formed on the insulating substrate, the light emitting unit including: a plurality of linear wiring patterns disposed on the insulating substrate in parallel with one another, a plurality of light emitting elements that are mounted between the wiring patterns while being electrically connected to the wiring patterns, and a sealing member for sealing the light emitting elements, as well as a method for manufacturing thereof, it becomes possible to provide a light emitting device that achieves sufficient electrical insulation and has simple manufacturing processes so that it can be manufactured at a low cost, and a method for manufacturing the same.
摘要:
By using a light emitting device including a substrate and a light emitting unit, the light emitting unit including: a plurality of light emitting elements that are mounted on substrate and electrically connected to external electrodes; a first sealing member layer containing a first fluorescent material, formed to cover light emitting elements; and a second sealing member layer containing a second fluorescent material, formed on first sealing member layer, as well as a method for manufacturing thereof, it becomes possible to provide a light emitting device capable of suppressing color shifts and the like by the fluorescent materials, and of being easily manufactured, as well as a method for manufacturing the same.
摘要:
The present invention relates to a compound or a pharmacologically acceptable salt thereof having superior glucokinase activating activity, and is a compound represented by general formula (I), or pharmacologically acceptable salt thereof: [wherein, A represents, for example, an oxygen atom or sulfur atom, R1 represents, for example, a C1-C6 alkyl group, a C1-C6 alkoxy group or a C1-C6 halogenated alkyl group, A and R1 together with the carbon atom bonded thereto form a heterocyclic group that may be substituted with 1 to 3 group(s) independently selected from Substituent Group α, R2 represents a phenyl group that may be substituted with 1 to 5 group(s) independently selected from Substituent Group α or a heterocyclic group that may be substituted with 1 to 3 group(s) independently selected from Substituent Group α, R3 represents a hydroxy group or a C1-C6 alkoxy group, and Substituent Group α consists of, for example, a halogen atom, a C1-C6 alkyl group, a C1-C6 alkyl group substituted with 1 or 2 hydroxy group(s), a C1-C6 alkylsulfonyl group, and a group represented by the formula —V—NR5R6 (wherein, V represents a carbonyl group or a sulfonyl group, and R5 and R6 may be the same or different and respectively represent a hydrogen atom or a C1-C6 alkyl group, or R5 and R6 together with the nitrogen atom bonded thereto form a 4- to 6-membered saturated heterocycle that may be substituted with 1 or 2 group(s) independently selected from a C1-C6 alkyl group and a hydroxy group, and the 4- to 6-membered saturated heterocycle may further contain one oxygen atom or nitrogen atom)].
摘要:
A light-emitting diode includes a substrate having a main surface, a light-emitting diode device arranged on the main surface, a translucent sealing resin portion sealing the light-emitting diode device so that the light-emitting diode device is implemented as an independent convex portion projecting from the main surface, and a reflector arranged on the main surface so as to surround an outer perimeter of the sealing resin portion with an inclined surface at a distance from the outer perimeter.
摘要:
A light-emitting apparatus of the present invention has (i) a semiconductor device which emits light toward a higher position than a substrate and (ii) a plurality of external connection terminals, and includes: a light-reflecting layer, provided on the substrate, which reflects the light emitted by the semiconductor device; and a covering layer which covers at least the light-reflecting layer and which transmits the light reflected by the light-reflecting layer. Further, the semiconductor device is provided on the covering layer, and is electrically connected to the external connection terminals via connecting portions, and the semiconductor device and the connecting portions are sealed with a sealing resin so as to be covered. Therefore, the light-emitting apparatus has increased efficiency with which light is taken out, and can prevent a reflecting layer from being altered, deteriorating, and decreasing in reflectance.