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公开(公告)号:US09870867B2
公开(公告)日:2018-01-16
申请号:US15323812
申请日:2015-04-06
Applicant: SHOWA DENKO K.K.
Inventor: Kazumi Naito , Ryuichi Mitsumoto
Abstract: When forming a conductive polymer layer serving as a cathode of a solid electrolytic capacitor, in order to obtain a high capacitance even with a small number of times of polymerization treatments, a capacitor anode according to the present invention includes a tungsten sintered body (2) and is provided with a dielectric film (1), and in which vanadium oxide is deposited on the surface of the dielectric film (1).
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公开(公告)号:US09734953B2
公开(公告)日:2017-08-15
申请号:US14650617
申请日:2013-09-24
Applicant: SHOWA DENKO K.K.
Inventor: Kazumi Naito , Shoji Yabe
IPC: H01G9/025 , C25D9/02 , C25D11/02 , H01G9/00 , H01G9/052 , H01G9/07 , H01G9/012 , H01G9/042 , H01G9/15
CPC classification number: H01G9/025 , C25D9/02 , C25D11/02 , H01G9/0032 , H01G9/0036 , H01G9/012 , H01G9/0425 , H01G9/052 , H01G9/07 , H01G9/15
Abstract: A carbon paste including a carbon powder, a resin, and an oxygen releasing oxidizer. The amount of the oxidizer is 3 to 30 parts by mass based on 100 parts by mass of the total amount of the carbon powder and the resin. A solid electrolytic capacitor element is prepared by a method which includes making a valve-action metal powder sintered to obtain an anode body, electrolytically oxidizing a surface of the anode body to chemically convert the surface into a dielectric layer, electrolytic polymerization to form a semiconductor layer of an electro conductive polymer on the dielectric layer, applying the carbon paste onto the semiconductor layer, and drying and hardening the carbon paste to form a carbon layer.
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公开(公告)号:US20150194268A1
公开(公告)日:2015-07-09
申请号:US14409205
申请日:2013-04-09
Applicant: SHOWA DENKO K.K.
Inventor: Kazumi Naito , Shouji Yabe
Abstract: A capacitor element including at least an anode body composed of a sintered compact containing tungsten as a main component, a dielectric layer with a smooth surface formed by chemical conversion of the surface of the anode body, and a semiconductor layer laminated on the dielectric layer. The capacitor is obtained by a production method which includes the steps of chemically converting the surface layer of the tungsten powder sintered compact into the dielectric layer in an aqueous solution containing 0.05 to 12% by mass of an oxidant composed of an oxygen-containing compound at a solution temperature of 62° C. or less, and removing all or most of water adhering to the inner surface of pores at a temperature of less than the boiling point of water, followed by drying at a temperature of not less than the boiling point of water.
Abstract translation: 一种电容器元件,至少包括由以钨为主要成分的烧结体构成的阳极体,通过阳极体表面的化学转化而形成的具有平滑表面的电介质层,以及层叠在电介质层上的半导体层。 该电容器是通过以下方法获得的,该方法包括以下步骤:将钨粉末烧结体的表面层化学转化成含有0.05〜12质量%的由含氧化合物构成的氧化剂的水溶液, 溶液温度为62℃以下,在小于沸点的温度下除去附着在孔内表面的全部或大部分水,然后在不低于沸点的温度下干燥 的水。
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公开(公告)号:US09959980B2
公开(公告)日:2018-05-01
申请号:US14963141
申请日:2015-12-08
Applicant: SHOWA DENKO K.K.
Inventor: Kazumi Naito , Shoji Yabe
CPC classification number: H01G9/15 , H01G9/0036 , H01G9/028 , H01G9/0425
Abstract: Disclosed is a solid electrolytic capacitor element including a dielectric layer, a first conductive polymer semiconductor layer, a second conductive polymer semiconductor layer and a conductor layer, formed in that order, on a tungsten anode body having an externally protruding lead wire, and the thickness of the thickest portion of the second conductive polymer semiconductor layer on the lower surface opposite the upper surface from which the lead wire protrudes is thinner than the thickness of the thickest portion of the second conductive polymer semiconductor layer on the side surfaces, and the thickness of the second conductive polymer semiconductor layer on the lower surface is greater than 2 μm and less than 15 μm.
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公开(公告)号:US20150221444A1
公开(公告)日:2015-08-06
申请号:US14425947
申请日:2013-07-30
Applicant: SHOWA DENKO K.K.
Inventor: Kazumi Naito , Katsutoshi Tamura , Masahiro Suzuki
CPC classification number: H01G9/10 , B29C45/14467 , B29C45/14639 , B29C2045/1454 , B29L2031/3406 , H01G9/0029 , H01G9/012 , H01G9/15 , Y10T29/417
Abstract: A method of manufacturing a solid electrolytic capacitor chip, which includes mounting a solid electrolytic capacitor element on the front surface side of a cathode lead of a lead frame serving as a cathode terminal; electrically connecting an anode and a cathode of the solid electrolytic capacitor element respectively to an anode terminal and the cathode terminal of the lead frame; and injecting an exterior resin from a resin injection port of a mold by transfer molding so as to seal the solid electrolytic capacitor element with the exterior resin. The resin injection port is located such that the exterior resin injected from the injection port branches and flows toward both the front surface side and the rear surface side and of the lead frame.
Abstract translation: 一种制造固体电解电容器芯片的方法,其包括在用作阴极端子的引线框架的阴极引线的前表面侧安装固体电解电容器元件; 将固体电解电容器元件的阳极和阴极分别电连接到引线框架的阳极端子和阴极端子; 以及通过传递模塑从模具的树脂注入口注入外部树脂,以便用外部树脂密封固体电解电容器元件。 树脂注入口被定位成使得从注射口注入的外部树脂分支并流向前表面侧和后表面侧以及引线框架。
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6.
公开(公告)号:US10370485B2
公开(公告)日:2019-08-06
申请号:US15795880
申请日:2017-10-27
Applicant: SHOWA DENKO K.K.
Inventor: Kazumi Naito , Shoji Yabe
Abstract: A solid electrolytic capacitor is obtained by a method which includes dissolving a polymerizable material for being converted into a conductive polymer in a water-soluble organic solvent to obtain a solution, adding the solution to water while homogenizing the solution to obtain a sol, immersing an anode body having a dielectric layer in the surface of the anode body in the sol, and applying voltage using the anode body as a positive electrode and a counter electrode as a negative electrode placed in the sol to electropolymerize the polymerizable material. An electropolymerizable liquid for producing a conductive polymer, the liquid composed of a sol comprising water, a water-soluble organic solvent, and a polymerizable material for being converted into the conductive polymer.
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公开(公告)号:US09892861B2
公开(公告)日:2018-02-13
申请号:US14410413
申请日:2013-04-11
Applicant: SHOWA DENKO K.K.
Inventor: Kazumi Naito , Shouji Yabe
CPC classification number: H01G9/0525 , H01G9/0029 , H01G9/0036 , H01G9/042 , H01G9/052 , H01G9/15
Abstract: An anode body for a capacitor formed by subjecting the sintered body which is obtained by sintering the molded body of tungsten powder to chemical conversion treatment, which anode body is doped with potassium in the amount of 0.003 to 0.3 mass %; a method of producing an anode body for a capacitor formed by subjecting the sintered body which is obtained by sintering the molded body of tungsten powder to chemical conversion treatment, including a process of doping the anode body with potassium in an amount of 0.003 to 0.3 mass %; and a solid electrolytic capacitor using the anode body.
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公开(公告)号:US09789538B2
公开(公告)日:2017-10-17
申请号:US14652163
申请日:2013-09-20
Applicant: SHOWA DENKO K.K.
Inventor: Kazumi Naito , Shoji Yabe
IPC: B22F9/16 , C23C8/10 , B22F1/02 , C23C8/42 , C23C8/02 , C25D5/34 , C25D7/00 , C22C27/04 , B22F9/04 , H01G9/052
CPC classification number: B22F1/02 , B22F9/04 , B22F2998/10 , B22F2999/00 , C22C27/04 , C23C8/02 , C23C8/42 , C25D5/34 , C25D7/006 , H01G9/052 , H01G9/0525 , B22F1/0088
Abstract: A method for finely powdering tungsten powder, which includes: a process for classifying a material tungsten powder into a fine powder having a relatively small average particle diameter and a coarse powder having a relatively large average particle diameter; an oxidation process for forming an oxide film on the particle surface of the coarse powder; and an alkali treatment process for removing the oxide film formed in the oxidation process and a natural oxide film formed on the fine powder with an alkali aqueous solution. Also disclosed is a method for producing ultrafine tungsten powder, which includes obtaining tungsten powder having an average particle diameter of 0.04 to 0.4 μm and a BET specific surface area of 5 to 15 m2/g by the above method for finely powdering.
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公开(公告)号:US09721732B2
公开(公告)日:2017-08-01
申请号:US14780095
申请日:2014-06-05
Applicant: SHOWA DENKO K.K.
Inventor: Kazumi Naito
Abstract: A production method efficiently produces a box sealed type solid electrolytic capacitor in which a capacitor element is accommodated in a box-shaped case. The method includes a step of preparing a bottom wall substrate having bottom walls. A step forms cathode anode circuit patterns on the bottom wall substrate. A step prepares a peripheral side wall substrate having peripheral side walls. A step prepares a peripheral side wall substrate in which a plurality of through-holes are provided that correspond to plurality of bottom wall structural portions. A step fixes a capacitor element to each bottom wall structural portion of the bottom wall substrate. A step obtains a capacitor continuous member in which a plurality of capacitor structural portions structuring a solid electrolytic capacitor by attaching an upper lid substrate on the peripheral side wall substrate. A step obtains a plurality of solid electrolytic capacitors by cutting the capacitor continuous member.
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公开(公告)号:US09691553B2
公开(公告)日:2017-06-27
申请号:US14651269
申请日:2013-09-27
Applicant: SHOWA DENKO K.K.
Inventor: Kazumi Naito , Shoji Yabe
CPC classification number: H01G9/0525 , B22F3/12 , B22F7/02 , B22F9/04 , B22F2998/10 , B22F2999/00 , C22C1/00 , C22C32/0078 , H01G9/052 , H01G9/15 , B22F9/22 , C22C1/1026 , C22C1/1094 , C22C2001/1089 , B22F3/02 , B22F3/1007 , B22F2201/20
Abstract: A method for producing an anode body in a capacitor, which includes making a molded body by molding a tungsten powder and making an anode body by sintering the molded body, which includes a step of bringing the tungsten powder or the molded body thereof into contact with a solution of a silicon compound before sintering the molded body so as to adjust the silicon content in the anode body to 0.05 to 7 mass %.