Hirofumi Fukunaga
Hirofumi Fukunaga, Chiba JP
Patent application number | Description | Published |
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20090035592 | COMPOUND OXIDE FILM AND METHOD FOR MANUFACTURING SAME, AND DIELECTRIC MATERIAL, PIEZOELECTRIC MATERIAL, CAPACITOR, PIEZOELECTRIC ELEMENT AND ELECTRONIC DEVICE WHICH INCLUDE COMPOUND OXIDE FILM - The invention provides a complex oxide film having a high crystallinity, produced by forming the complex oxide film on a substrate surface and then calcining the complex oxide film in atmospheric gas under oxygen partial pressure of 1×10 | 02-05-2009 |
20100220428 | COMPLEX OXIDE FILM AND METHOD FOR PRODUCING SAME, DIELECTRIC MATERIAL INCLUDING COMPLEX OXIDE FILM, PIEZOELECTRIC MATERIAL, CAPACITOR, PIEZOELECTRIC ELEMENT, AND ELECTRONIC DEVICE - The invention relates to a method for a complex oxide film having a high relative dielectric constant formed on a substrate surface by wet-treatment method and a production process of the complex oxide film comprising a step of washing the complex oxide film with an acid solution of pH 5 or less to thereby reduce salts in the film. Further, the invention relates to a dielectric material and a piezoelectric material containing the complex oxide film, a capacitor and a piezoelectric element including the material, and a electronic device comprising the element. | 09-02-2010 |
Hirofumi Fukunaga, Tokyo JP
Patent application number | Description | Published |
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20100103589 | BASE MATERIAL FOR SOLID ELECTROLYTIC CAPACITOR, CAPACITOR USING THE BASE MATERIAL, AND METHOD FOR MANUFACTURING THE CAPACITOR - The invention relates to a substrate for solid electrolytic capacitor, wherein a first layer in the shielding layer formed by laminating a plurality of layers on top of each other, provided in an area for separating an anode part and a cathode part of the substrate for a solid electrolytic capacitor having a porous layer on its surface from a solution or dispersion of a heat resistant resin or its precursor, free from a shielding layer modification additive (except for a silane coupling agent) or containing a shielding layer modification additive content of not more than 0.1% by mass (based on the mass of the heat resistant resin or its precursor). The present invention enables to provide a method for producing a substrate for a solid electrolytic capacitor comprising a shielding layer made of a masking material which ensures the insulation between the anode part and the cathode part of the solid electrolytic capacitor; and a solid electrolytic capacitor using the substrate. | 04-29-2010 |
20100103590 | SOLID ELECTROLYTIC CAPACITOR AND PRODUCTION METHOD THEREOF - The present invention relates to a solid electrolytic capacitor comprising a layer of self-doping type conductive polymer having a crosslink between polymer chains thereof on the dielectric film formed on a valve-acting metal. The present invention enables to stably produce thin capacitor elements suitable for laminated type solid electrolytic capacitors, showing less short-circuit failure and less fluctuation in the shape of element, which allows to increase the number of laminated elements in a solid electrolytic capacitor chip to make a capacitor having a high capacity, and having less fluctuation in equivalent series resistance. | 04-29-2010 |
Hirofumi Fukunaga, Kanagawa JP
Patent application number | Description | Published |
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20080238307 | ORGANIC ELECTROLUMINESCENCE ELEMENT - An organic electroluminescence element is disclosed, which includes at least one organic compound layer including a light-emitting layer between a pair of electrodes, wherein the light-emitting layer contains a host material, a light-emitting material and a phosphine oxide compound. An organic electroluminescence element exhibiting high light-emission efficiency and having excellent drive durability is provided. | 10-02-2008 |
20080241518 | ORGANIC ELECTROLUMINESCENCE ELEMENT - An organic electroluminescence element having at least one organic layer including a light-emitting layer between a pair of electrodes, wherein the organic electroluminescence element has an electron transport layer containing a phosphine oxide compound and an electron transport layer that does not substantially contain the phosphine oxide compound between the light-emitting layer and a cathode, the electron transport layer containing the phosphine oxide compound is nearer to the cathode, and the electron transport layer that does not substantially contain the phosphine oxide compound is nearer to the light-emitting layer. An organic EL element that exhibits high light-emission efficiency and is excellent in drive durability is provided. | 10-02-2008 |
20080241589 | ORGANIC ELECTROLUMINESCENT DEVICE - An organic electroluminescent device is provided and includes: a pair of electrodes; and an organic compound layer between the pair of electrodes, the organic compound layer including a light-emitting layer. The at least one organic compound layer contains at least one of a compound represent by formula (I) and a compound represented by formula (II). | 10-02-2008 |
20090107034 | METHOD OF PRODUCING A FATTY ACID ALKYL ESTER, AND FUEL - A method of producing a fatty acid alkyl ester, containing: conducting an transesterification reaction of an oil or/and fat with a straight-chain or branched alcohol having 1 to 4 carbon atoms, in the presence of a phosphoric acid alkali-metal salt; and a fuel containing the fatty acid alkyl ester produced by the method in a given ratio. | 04-30-2009 |
20090247736 | Luminous Compound Containing Lanthanide Ion - A luminous compound represented by the following formula (I): | 10-01-2009 |