Abstract: A ZrO2—Al2O3 composite ceramic material having excellent wear resistance, hardness, strength and toughness is provided. This ceramic material comprises a ZrO2 phase composed of 90 vol % or more of tetragonal ZrO2, and containing 10 to 12 mol % of CeO2 as a stabilizer, and an Al2O3 phase. An amount of the Al2O3 phase in the ceramic material is in a range of 20 to 70 vol %, and preferably 40 to 70 vol %. In the composite ceramic material, Al2O3 grains each having a fine ZrO2 grain therein are dispersed. Some of the Al2O3 grains each having the fine ZrO2 grain therein are trapped within ZrO2 grains to form composite grains. A ratio of the number of the Al2O3 grains each having the fine ZrO2 grain therein relative to the number of the entire Al2O3 grains dispersed in the composite ceramic material is 10% or more, and preferably 50% or more.

Abstract: A molded composite comprising a first molded part 11 and a second molded part 12 which is bonded to the surface and/or a cross-sectional surface of the first molded part 11 is disclosed. The first molded part 11 is obtained by extrusion foam molding of an olefin thermoplastic elastomer composition, comprising (A) an ethylene-?-olefin copolymer rubber having an intrinsic viscosity [?] of 3.5 to 6.8 dl/g as measured at 135° C. in a decalin solvent, (B) a polyolefin resin, and (C) a mineral oil-based softener in a predetermined proportion and obtained by dynamically heat-treating a mixture of at least (A) the ethylene-?-olefin copolymer rubber and (B) the polyolefin resin in the presence of a cross-linking agent, at an expansion ratio of 1.2 times or more and the second molded part 12 is obtained by injection molding of the olefin thermoplastic elastomer composition and/or another thermoplastic elastomer composition and bonded to the surface and/or a cross-sectional surface of the first molded part 11.

Abstract: A method for producing an ?,?-unsaturated carboxylic acid ester is provided in which an alcohol (A) is caused to react with an ?,?-unsaturated carboxylic acid or a lower alkyl ester (B) of the ?,?-unsaturated carboxylic acid in the presence of a sulfonic acid group-carrying inorganic porous material (?), and an ?,?-unsaturated carboxylic acid ester obtained by the above-described method is provided that contains not more than 50 ppm of sulfur atoms based on a weight of the ?,?-unsaturated carboxylic acid ester, not more than 2 mol % of by-product etherification products and not more than 1 mol % of by-product addition products based on the mole number of the ?,?-unsaturated carboxylic acid ester.

Abstract: Provides is a compound semiconductor substrate about which the thickness of its nitride semiconductor single crystal layer can be made large while the generation of cracks, crystal defects or the like is restrained in the nitride semiconductor single crystal layer. The substrate has a first intermediate layer 110 formed on a Si single crystal substrate 100 having a crystal plane orientation of {111}. In the layer 110, a first metal compound layer 110a made of any one of TiC, TiN, VC and VN, and a second metal compound layer 110b made of any one of compounds which are different from the compound of the first metal compound layer out of TiC, TiN, VC and VN are laminated in this order alternately each other over the Si single crystal.

Abstract: In a portable radio apparatus, the antenna performance is improved while fitting conductor elements into an inside of a case without an increase in size of the case when two cases are closed. A monopole antenna arranged in an inside of a first case of a portable radio apparatus includes an element 11 on the power feed side, an element 12 on the open end side, and a resonance circuit 13. A width of the element 12 on the open end side, which comes close to an electronic parts 10 arranged in an inside of a second case and containing a metal in a folded mode, is set smaller than a width of the element 11 on the power feed side, which does not come close to the electronic parts 10.

Abstract: In the foldable mobile radio apparatus constructed by coupling two cases to open and close, the high antenna performance can be secured over the wider band with the simple structure. A foldable mobile radio apparatus, includes a first case, an antenna element provided to the first case, a second case, a hinge portion for joining the first case and the second case turnably, a circuit board provided to an inside of the second case and having a ground pattern, and a feeding portion connected to a radio circuit on the circuit board. The hinge portion is formed of a nonconductive resin, and has a rotation shaft made of conductive metal to join the first case and the second case turnably. The rotation shaft is spatially coupled to the antenna element at a predetermined interval, and the rotation shaft is arranged to separate from the ground pattern on the circuit board, and is connected electrically to the feeding portion.

Abstract: To provide a nitride semiconductor single crystal substrate comprising a Si substrate and a nitride semiconductor film which has semi-polar (10-1m) plane (m: natural number) and a thickness of 1 ?m or more, the nitride semiconductor single crystal substrate being suitably used for a light-emitting device, the nitride semiconductor single crystal substrate being suitably used for a light-emitting device, this invention provides a nitride semiconductor single crystal substrate comprising a Si substrate having an off-cut angle of 1 to 35° in the <110> direction from the <100> direction, a buffer layer 2a (2b) made of at least one of SiC or BP formed on the Si substrate, a AlN buffer layer formed on the buffer layers, and a nitride semiconductor single crystal film formed on the AlN buffer layer, the nitride semiconductor single crystal film comprising any one of GaN (10-1m), AlN (10-1m), InN (10-1m) or a GaN (10-1m)/and AlN (10-1m) superlattice film.

Abstract: A thermoplastic elastomer composition of the invention, formed by dynamically crosslinking a polymer composition including a rubber and an olefinic resin and having an average particle size of rubber particles within a specific range, shows an excellent balance of mechanical properties such as flexibility and elastic recovery, and a moldability. Also an inclusion of a (meth)acrylate resin and a hydrogenated diene polymer provides a composition particularly excellent in scratch resistance. Also an inclusion of a maleimide compound provides a composition particularly excellent in injection fusibility. Also an inclusion of an undenatured organopolysiloxane of a specific viscosity and a denatured organopolysiloxane provides a composition particularly excellent in initial slidability and durable slidability.

Abstract: Regardless of a user's hand holding condition, it is possible to obtain excellent antenna performance in both of folded and unfolded calling conditions. A folder type mobile radio apparatus includes an upper case 1301 having a first antenna element made of a metal plate 1305, a lower case 1302 having a second antenna element made of a circuit board 102, a hinge portion 1303 pivotably connecting the upper and lower cases 1301 and 1302, a first circuit board 101 having a ground pattern provided in an end side near the hinge portion 1303 in the lower case, an antenna switching unit 103 for selecting one of a first feed means for feeding the first antenna element for the radio circuit 1314 on the first circuit board 101 or a second feed means for feeding the second antenna element.

Abstract: A material for an optical circuit-electrical circuit mixedly mounting substrate comprises a light permeable resin layer, and an optical circuit forming layer that is made of a light permeable resin of which refractive index increases (or decreases) when irradiated with an activating energy beam and is disposed adjacent to the light permeable resin layer, wherein a refractive index of a portion of the optical circuit forming layer is higher (or lower) than that of the light permeable resin layer when the material for the optical circuit-electrical circuit mixedly mounting substrate is irradiated with an activating energy beam so that said portion is irradiated.

Abstract: A material for an optical circuit-electrical circuit mixedly mounting substrate comprises a light permeable resin layer, and an optical circuit forming layer that is made of a light permeable resin of which refractive index increases (or decreases) when irradiated with an activating energy beam and is disposed adjacent to the light permeable resin layer, wherein a refractive index of a portion of the optical circuit forming layer is higher (or lower) than that of the light permeable resin layer when the material for the optical circuit-electrical circuit mixedly mounting substrate is irradiated with an activating energy beam so that said portion is irradiated.

Abstract: The invention is to improve antenna performance in an internal antenna in a closed state without deteriorating the antenna performance in a state where a foldable portable radio apparatus is opened. A foldable portable radio apparatus includes a foldable mechanism in which an upper casing 101 and a lower casing 104 are rotatably connected, a first conductor plate 102 and a second conductor plate 103 that are provided in the upper casing 101, and a feeding system that is provided in the lower casing 104, and connects an antenna element 107, a circuit board 105, the first conductor plate 102, and the circuit board, a detecting unit 109 that detects opened and closed states between the upper casing 101 and the lower casing 104, and a first switching unit 110 that switches between an electrically opened state and an electrically short-circuited state between the first conductor plate and the second conductor plate according to the detected result by the detecting unit 109.

Abstract: A back electrode 6 is formed in the back of a Si single crystal substrate 2 of a compound semiconductor in which an n-type 3C-SiC single crystal buffer layer 3 having a thickness of 0.05-2 ?m, a carrier concentration of 1016-1021/cm3, a hexagonal InwGaxAl1-w-xN single crystal buffer layer 4 (0?w<1, 0?x<1, w+x<1) having a thickness of 0.01-0.5 ?m, and an n-type hexagonal InyGazAl1-y-zN single crystal layer 5 (0?y<1, 0<z?1, y+z?1) having a thickness of 0.1-5 ?m and a carrier concentration of 1011-1016/cm3 are stacked in order on an n-type Si single crystal substrate top 2 having a crystal-plane orientation {111}, a carrier concentration of 1016-1021/cm3, and a surface electrode 7 is formed on a surface of a hexagonal InyGazAl1-y-zN single crystal layer 5, so as to provide a compound semiconductor device which causes little energy loss and allows an high efficiency and a high breakdown voltage.

Abstract: A material for an optical circuit-electrical circuit mixedly mounting substrate comprises a light permeable resin layer, and an optical circuit forming layer that is made of a light permeable resin of which refractive index increases (or decreases) when irradiated with an activating energy beam and is disposed adjacent to the light permeable resin layer, wherein a refractive index of a portion of the optical circuit forming layer is higher (or lower) than that of the light permeable resin layer when the material for the optical circuit-electrical circuit mixedly mounting substrate is irradiated with an activating energy beam so that said portion is irradiated.

Abstract: A thermoplastic elastomer composition of the invention, formed by dynamically crosslinking a polymer composition including a rubber and an olefinic resin and having an average particle size of rubber particles within a specific range, shows an excellent balance of mechanical properties such as flexibility and elastic recovery, and a moldability. Also an inclusion of a (meth)acrylate resin and a hydrogenated diene polymer provides a composition particularly excellent in scratch resistance. Also an inclusion of a maleimide compound provides a composition particularly excellent in injection fusibility. Also an inclusion of an undenatured organopolysiloxane of a specific viscosity and a denatured organopolysiloxane provides a composition particularly excellent in initial slidability and durable slidability.

Abstract: There is provided a thermoplastic elastomer composition including an ethylene/?-olefin copolymeric rubber (A1) or an extended rubber (X) comprising an ethylene/?-olefin copolymeric rubber (A2) and a mineral oil softener (E2), and a thermoplastic ?-olefin resin (B) comprising a ?-olefinic crystalline thermoplastic resin (B1) and/or a ?-olefinic amorphous thermoplastic resin (B2), an unmodified organopolysiloxane (C), a viny-terminated organopolysiloxane (D), and a mineral oil softener (E1); and molded article produced by forming the thermoplastic elastomer composition. There is provided a thermoplastic elastomer composition and a molded article thereof having excellent molding appearance by imparting an initial sliding ability with an organopolysiloxane having low viscosity and by adding a crosslinked vinylated organopolysiloxane to a thermoplastic elastomer composition to exhibit durable abrasion resistance (long term sliding ability).

Abstract: The present invention provides a nitride semiconductor single crystal including gallium nitride (GaN) or aluminum nitride (AlN) which are formed as a film to have good crystallinity without forming a 3C—SiC layer on a Si substrate, and which can be used suitably for a light emitting diode, a laser light emitting element, an electronic element that can be operated at a high speed and a high temperature, etc., as well as a high frequency device. A GaN (0001) or AlN (0001) single crystal film, or a super-lattice structure of GaN (0001) and AlN (0001) is formed on a Si (110) substrate via a 2H—AlN buffer layer.

Abstract: A substrate 1 for growing an electro-optical single crystal thin film in which two or more layers of buffer layers 3, 4, and 5 for buffering lattice mismatch between Si and BTO are formed on an Si (001) substrate 2 is provided as a substrate for growing an electro-optical single crystal thin film which can obtain an electro-optical single crystal thin film of BTO single crystal thin film 6 etc. with a large size and a very high quality.

Abstract: A material for an optical circuit-electrical circuit mixedly mounting substrate comprises a light permeable resin layer, and an optical circuit forming layer that is made of a light permeable resin of which refractive index increases (or decreases) when irradiated with an activating energy beam and is disposed adjacent to the light permeable resin layer, wherein a refractive index of a portion of the optical circuit forming layer is higher (or lower) than that of the light permeable resin layer when the material for the optical circuit-electrical circuit mixedly mounting substrate is irradiated with an activating energy beam so that said portion is irradiated.

Abstract: A method for producing an ?,?-unsaturated carboxylic acid ester is provided in which an alcohol (A) is caused to react with an ?,?-unsaturated carboxylic acid or a lower alkyl ester (B) of the ?,?-unsaturated carboxylic acid in the presence of a sulfonic acid group-carrying inorganic porous material (?), and an ?,?-unsaturated carboxylic acid ester obtained by the above-described method is provided that contains not more than 50 ppm of sulfur atoms based on a weight of the ?,?-unsaturated carboxylic acid ester, not more than 2 mol % of by-product etherification products and not more than 1 mol % of by-product addition products based on the mole number of the ?,?-unsaturated carboxylic acid ester.