Abstract: A drive shaft includes a first annular wall and a second annular wall joined together via a friction-welded portion. The first annular wall and the second annular wall have outer diameters of 30 to 50 mm and wall thicknesses of 3 to 5 mm. A burr created at the friction-welded portion has a connection radius of greater than or equal to 0.5 mm, a base radius of greater than or equal to 0.5 mm, a burr base angle of less than or equal to 40°, and a burr slope length of 0.2 to 5 mm.

Abstract: The present invention provides a polyimide-based copolymer and electronic component and field effect transistor comprising the same. The polyimide-based copolymer comprises a copolymer of dianhydride and heterocyclic diamine, wherein the heterocyclic diamine has two benzene rings, and there are two ether bonds, two thioether bonds, or one ether bond and one thioether bond between the two benzene rings. The novel polyimide-based copolymer of the invention has excellent thermal-mechanical stability, has potential application prospects, and can be used as a substrate for flexible electronics.

Abstract: A graphic image displayed on a tomographic image includes a puncture guide. The puncture guide has a main guide line and a sub guide line. The main guide line represents a reference puncture route based on a puncture angle, and the sub guide line represents the edge of a composite area defined by a plurality of scans. A deflection angle (?1) is determined according to the designation of a puncture angle (?1), and the puncture guide is formed on the basis of these angles.

Abstract: In the diagnostic ultrasound apparatus, moving average processing is successively performed on a frame series with frame sets obtained from three kinds of frames, A, B, and C, as units, thereby successively generating compound frames. Each compound frame has a central sub-region and multiple peripheral sub-regions. In order to match the gain between the multiple sub-regions when generating each compound frame, a special compounding condition is applied to individual peripheral sub-regions. Specifically, processing that redundantly substitutes the same data value for multiple elements in the compounding computation equation is performed. Using such a spatial compounding, differences in gain between multiple sub-regions can be eliminated or reduced.

Abstract: A phosphoric acid polymer containing a repeating unit represented by the following formula (1): (wherein, R1 represents a hydrogen atom or methyl, group).

Abstract: A method for manufacturing a ceramic electronic component capable of preventing degradation of the self alignment property and product characteristics due to absorption of flux into pores of a ceramic element assembly during soldering in mounting and a ceramic electronic component. In the method, a ceramic element assembly is subjected to an oil-repellent treatment by using an oil-repellent agent containing a polyfluoropolyether compound as a primary component and hydrofluoroether as a solvent, so as to avoid absorption of the flux by the ceramic element assembly.

Abstract: A liquid crystal polyimide, containing: repeating units of formula (I) and having liquid crystallinity, wherein A1 and A2 are each independently a tetravalent residue of a tetracarboxylic acid, B1 is a residue of a bis(amino) polysiloxane of formula (II), and C1 is a residue of an organic diamine, wherein R1 to R6 are each independently a lower alkyl group, x is from 0 to 10, D1 is an alkylene group, y is 0 or 1, and Z1 is selected from the group consisting of —H, —CH3, CF3, —F, —CN and —NO2. In addition, a liquid crystal resin composition and a resin film for a semiconductor element containing the liquid crystal polyimide.

Abstract: A multilayer coil component includes internal conductors made of silver (Ag) having metal films provided on surfaces thereof to suppress migration of Ag contained in the internal conductors and/or relieve internal stress between magnetic ceramic layers and internal conductor layers without forming gaps at interfaces between the internal conductors including the metal films and a magnetic ceramic surrounding the internal conductors and the interfaces between the internal conductors and the magnetic ceramic. In a manufacturing method for forming a multilayer coil, an acidic solution containing a metal is allowed to penetrate a magnetic ceramic through side surfaces thereof and side gap sections that are regions between side portions of internal conductors and the side surfaces to reach the interfaces between the internal conductors and a surrounding magnetic ceramic, whereby the metal is deposited on surfaces of the internal conductors.

Abstract: A method for manufacturing a ceramic electronic component capable of preventing degradation of the self alignment property and product characteristics due to absorption of flux into pores of a ceramic element assembly during soldering in mounting and a ceramic electronic component. In the method, a ceramic element assembly is subjected to an oil-repellent treatment by using an oil-repellent agent containing a polyfluoropolyether compound as a primary component and hydrofluoroether as a solvent, so as to avoid absorption of the flux by the ceramic element assembly.

Abstract: A method for manufacturing a ceramic electronic component capable of preventing degradation of the self alignment property and product characteristics due to absorption of flux into pores of a ceramic element assembly during soldering in mounting and a ceramic electronic component. In the method, a ceramic element assembly is subjected to an oil-repellent treatment by using an oil-repellent agent containing a polyfluoropolyether compound as a primary component and hydrofluoroether as a solvent, so as to avoid absorption of the flux by the ceramic element assembly.

Abstract: A liquid crystal polyimide, containing: repeating units of formula (I) and having liquid crystallinity, wherein A1 and A2 are each independently a tetravalent residue of a tetracarboxylic acid, B1 is a residue of a bis(amino)polysiloxane of formula (II), and C1 is a residue of an organic diamine, wherein R1 to R6 are each independently a lower alkyl group, x is from 0 to 10, D1 is an alkylene group, y is 0 or 1, and Z1 is selected from the group consisting of —H, —CH3, CF3, —F, —CN and —NO2. In addition, a liquid crystal resin composition and a resin film for a semiconductor element containing the liquid crystal polyimide.

Abstract: Provided is a polyfunctional compound which can be used as an optical recording material in which a large quantity of information data can be recorded optically at a high density, which can be used as an optical waveguide material using a refractive index difference occurring between a light-irradiated part and a part not irradiated with light, and which is capable of forming a film and can be used as a photo-alignment film material having excellent photosensitivity.

Abstract: Provided is an easy method for production of a high-performance polyfunctional compound which can be used as an optical recording material, an optical waveguide material, a photo-alignment film material, or the like, in a simple manner. The method for production of a polyfunctional compound includes conducting a Michael addition of a compound (A) having a hydrogen atom of pKa?15 to a (meth)acrylate or a (meth)acrylamide (B), in which at least one of the compounds (A) and (B) has a photoisomerization group and/or a liquid-crystalline group.

Abstract: Provided is an easy method for production of a high-performance polyfunctional compound which can be used as an optical recording material, an optical waveguide material, a photo-alignment film material, or the like, in a simple manner. The method for production of a polyfunctional compound includes conducting a Michael addition of a compound (A) having a hydrogen atom of pKa?15 to a (meth)acrylate or a (meth)acrylamide (B), in which at least one of the compounds (A) and (B) has a photoisomerization group and/or a liquid-crystalline group.

Abstract: A method for manufacturing a ceramic electronic component capable of preventing degradation of the self alignment property and product characteristics due to absorption of flux into pores of a ceramic element assembly during soldering in mounting and a ceramic electronic component. In the method, a ceramic element assembly is subjected to an oil-repellent treatment by using an oil-repellent agent containing a polyfluoropolyether compound as a primary component and hydrofluoroether as a solvent, so as to avoid absorption of the flux by the ceramic element assembly.

Abstract: A process for producing a carbonic ester, characterized in that an aromatic monohydroxy compound or an aliphatic monohydroxy compound is subjected to oxidative carbonylation with carbon monoxide and oxygen in the presence of a palladium catalyst using a compound having a carbonate bond as a reaction solvent. A process for producing a polycarbonate, characterized in that an aromatic dihydroxy compound or an aliphatic dihydroxy compound is subjected to oxidative carbonylation with carbon monoxide and oxygen in the presence of a palladium catalyst using a compound having a carbonate bond as a reaction solvent is also described. The carbonic ester can be produced with a higher yield and at a higher reaction rate and, also, a polycarbonate having a higher molecular weight as compared with the conventional method can be produced with a higher yield and at a higher reaction rate.

Abstract: A highly reliable multilayer coil component is provided without forming voids between magnetic ceramic layers and internal conductor layers. According to the multilayer coil component, an internal stress problem is reduced, the direct current resistance is low, and fracture of internal conductors caused by the surge or the like is not likely to occur. An acidic solution is allowed to permeate a magnetic ceramic element from a side surface thereof through a side gap portion which is a region between side portions of the internal conductors and the side surface of the magnetic ceramic element and to reach interfaces between the internal conductors and a magnetic ceramic located therearound. A pore area ratio of the magnetic ceramic of the side gap portion which is located between the side portions of the internal conductors and the side surface of the magnetic ceramic element is set in the range of 6% to 28%.

Abstract: Provided is an easy method for production of a high-performance polyfunctional compound which can be used as an optical recording material, an optical waveguide material, a photo-alignment film material, or the like, in a simple manner. The method for production of a polyfunctional compound includes conducting a Michael addition of a compound (A) having a hydrogen atom of pKa?15 to a (meth)acrylate or a (meth)acrylamide (B), in which at least one of the compounds (A) and (B) has a photoisomerization group and/or a liquid-crystalline group.

Abstract: A highly reliable multilayer coil component is provided without forming voids between magnetic ceramic layers and internal conductor layers. According to the multilayer coil component, an internal stress problem is reduced, the direct current resistance is low, and fracture of internal conductors caused by the surge or the like is not likely to occur. An acidic solution is allowed to permeate a magnetic ceramic element from a side surface thereof through a side gap portion which is a region between side portions of the internal conductors and the side surface of the magnetic ceramic element and to reach interfaces between the internal conductors and a magnetic ceramic located therearound. A pore area ratio of the magnetic ceramic of the side gap portion which is located between the side portions of the internal conductors and the side surface of the magnetic ceramic element is set in the range of 6% to 28%.

Abstract: A highly reliable multilayer coil component is provided without forming voids between magnetic ceramic layers and internal conductor layers. According to the multilayer coil component, an internal stress problem is reduced, the direct current resistance is low, and fracture of internal conductors caused by the surge or the like is not likely to occur. An acidic solution is allowed to permeate a magnetic ceramic element from a side surface thereof through a side gap portion which is a region between side portions of the internal conductors and the side surface of the magnetic ceramic element and to reach interfaces between the internal conductors and a magnetic ceramic located therearound. A pore area ratio of the magnetic ceramic of the side gap portion which is located between the side portions of the internal conductors and the side surface of the magnetic ceramic element is set in the range of 6% to 28%.