Patents by Inventor Takehisa Sasabayashi

Takehisa Sasabayashi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8587919
    Abstract: In a laminate type ceramic electronic component, when an external electrode for a laminated ceramic capacitor is formed directly by plating onto a surface of a component main body, the film that is directly plated may have a low fixing strength with respect to the component main body. As the external electrode, a first plating layer composed of a Ni—P plating film with a P content rate of about 9 weight % or more is first formed such that a plating deposition deposited with the exposed ends of respective internal electrodes as starting points is grown on at least an end surface of a component main body. Then, a second plating layer composed of a Ni plating film containing substantially no P is formed on the first plating layer. Preferably, the first plating layer is formed by electroless plating, whereas the second plating layer is formed by electrolytic plating.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: November 19, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Makoto Ogawa, Akihiro Motoki, Takehisa Sasabayashi, Takayuki Kayatani
  • Patent number: 8547682
    Abstract: In a multilayer ceramic electronic component including directly plated external electrodes, in an exposed area defined by exposed portions of a plurality of internal conductors, an area ratio of the exposed portions in an end section of the exposed area is smaller than an area of exposed portions in a center section of the exposed area.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: October 1, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Takehisa Sasabayashi
  • Patent number: 8503160
    Abstract: In a laminate type ceramic electronic component, when an external electrode is formed directly by plating onto a surface of a component main body, the plating film that is to serve as the external electrode may have a low fixing strength with respect to the component main body. In order to prevent this problem, an external electrode includes a first plating layer composed of a Ni—B plating film and is first formed such that a plating deposition deposited with the exposed ends of respective internal electrodes as starting points is grown on at least an end surface of a component main body. Then, a second plating layer composed of a Ni plating film containing substantially no B is formed on the first plating layer. Preferably, the B content of the Ni—B plating film constituting the first plating layer is about 0.1 wt % to about 6 wt %.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: August 6, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Masahito Saruban, Makoto Ogawa, Akihiro Motoki, Takehisa Sasabayashi, Takayuki Kayatani
  • Patent number: 8477476
    Abstract: A ceramic electronic component includes a ceramic element including opposed side surfaces, an inner electrode, and an external terminal electrode. The external terminal electrode includes a first conductive layer and a second conductive layer. The first conductive layer is formed by plating so as to be electrically coupled to an exposed section of the internal electrode exposed to the side surfaces. The second conductive layer is arranged so as to cover the first conductive layer and includes conductive resin. The value of T2/T1 is in the range of about 3.4 to about 11.3, where T1 indicates the thickness of the first conductive layer and T2 indicates the thickness of the second conductive layer.
    Type: Grant
    Filed: April 4, 2011
    Date of Patent: July 2, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Atsushi Ishida, Takumi Taniguchi, Takehisa Sasabayashi, Tomoyuki Kuwano, Akihiro Motoki, Toshiyuki Iwanaga
  • Patent number: 8305729
    Abstract: A laminated ceramic electronic component includes first internal electrodes and second internal electrodes that overlap each other through ceramic layers, each of the first and second internal electrodes having first and second effective portions, first and second connecting portions, and first and second extended portions whose film thickness is greater than that of the first and second connecting portions and which are exposed at the outer surface of a ceramic element assembly. When distances from side surfaces of the ceramic assembly on which first and second external electrodes are provided to the inner edges of the first and second extended portions are defined as L1 and L2, respectively, and a distance between side surfaces and the end of the second internal electrode or the end of the first internal electrode is defined as G2 or G1, G2>L1 and G1>L2 are satisfied.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: November 6, 2012
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Tsuyoshi Ito, Takehisa Sasabayashi
  • Patent number: 8248754
    Abstract: A dielectric ceramic contains a barium titanate and Li. In the dielectric ceramic, the following inequalities are satisfied: 0.5?e?6.0, 0.06<Rg<0.17, and ?g<0.075, where e is the content, in molar parts, of Li with respect to 100 molar parts of the titanate; Rg is the average size, in ?m, of grains in the dielectric ceramic; and ?g is the standard deviation, in ?m, of the size of the grains.
    Type: Grant
    Filed: August 13, 2009
    Date of Patent: August 21, 2012
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Tomonori Muraki, Tomoyuki Nakamura, Makoto Matsuda, Hironori Suzuki, Takehisa Sasabayashi, Masayuki Ishihara, Akihiro Shiota
  • Publication number: 20120039015
    Abstract: In a laminate type ceramic electronic component, when an external electrode is formed directly by plating onto a surface of a component main body, the plating film that is to serve as the external electrode may have a low fixing strength with respect to the component main body. In order to prevent this problem, an external electrode includes a first plating layer composed of a Ni—B plating film and is first formed such that a plating deposition deposited with the exposed ends of respective internal electrodes as starting points is grown on at least an end surface of a component main body. Then, a second plating layer composed of a Ni plating film containing substantially no B is formed on the first plating layer. Preferably, the B content of the Ni—B plating film constituting the first plating layer is about 0.1 wt % to about 6 wt %.
    Type: Application
    Filed: August 12, 2011
    Publication date: February 16, 2012
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Masahito SARUBAN, Makoto OGAWA, Akihiro MOTOKI, Takehisa SASABAYASHI, Takayuki KAYATANI
  • Publication number: 20120039014
    Abstract: In a laminate type ceramic electronic component, when an external electrode for a laminated ceramic capacitor is formed directly by plating onto a surface of a component main body, the film that is directly plated may have a low fixing strength with respect to the component main body. As the external electrode, a first plating layer composed of a Ni—P plating film with a P content rate of about 9 weight % or more is first formed such that a plating deposition deposited with the exposed ends of respective internal electrodes as starting points is grown on at least an end surface of a component main body. Then, a second plating layer composed of a Ni plating film containing substantially no P is formed on the first plating layer. Preferably, the first plating layer is formed by electroless plating, whereas the second plating layer is formed by electrolytic plating.
    Type: Application
    Filed: August 12, 2011
    Publication date: February 16, 2012
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Makoto OGAWA, Akihiro MOTOKI, Takehisa SASABAYASHI, Takayuki KAYATANI
  • Patent number: 8116065
    Abstract: A dielectric ceramic material is composed of a perovskite compound represented by ABO3 as a main component. In the case where ABO3 is, for example, BaTiO3, the crystal grains include BaTiO3 crystal grains composed of the main component and, as secondary phases, Mg—Ni—Ti-containing crystalline grains composed of a crystalline oxide containing at least Mg, Ni, and Ti and Ba—Si-containing crystalline grains composed of a crystalline oxide containing at least Ba and Si.
    Type: Grant
    Filed: July 9, 2009
    Date of Patent: February 14, 2012
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Tomoyuki Nakamura, Hironori Suzuki, Tomonori Muraki, Masayuki Ishihara, Makoto Matsuda, Takehisa Sasabayashi, Akihiro Shiota
  • Publication number: 20110267736
    Abstract: A laminate includes insulating layers laminated to each other. Capacitor conductors are embedded in the laminate and have exposed portions exposed between the insulating layers at respective surfaces of the laminate. The capacitor conductors define a capacitor. External electrodes are provided by plating on the respective surfaces of the laminate so as to directly cover the respective exposed portions. When the laminate is viewed in plan in a y axis direction, the length of each of the exposed portions is approximately 35% to approximately 45% of the length of an outer periphery of the insulating layer.
    Type: Application
    Filed: April 25, 2011
    Publication date: November 3, 2011
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Takehisa SASABAYASHI, Takumi TANIGUCHI
  • Publication number: 20110255209
    Abstract: A ceramic electronic component includes a ceramic element including opposed side surfaces, an inner electrode, and an external terminal electrode. The external terminal electrode includes a first conductive layer and a second conductive layer. The first conductive layer is formed by plating so as to be electrically coupled to an exposed section of the internal electrode exposed to the side surfaces. The second conductive layer is arranged so as to cover the first conductive layer and includes conductive resin. The value of T2/T1 is in the range of about 3.4 to about 11.3, where T1 indicates the thickness of the first conductive layer and T2 indicates the thickness of the second conductive layer.
    Type: Application
    Filed: April 4, 2011
    Publication date: October 20, 2011
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Atsushi ISHIDA, Takumi TANIGUCHI, Takehisa SASABAYASHI, Tomoyuki KUWANO, Akihiro MOTOKI, Toshiyuki IWANAGA
  • Patent number: 7911764
    Abstract: A dielectric ceramic contains a BaTiO3-based compound as a main ingredient, and can be represented by the general formula: 100AmBO3+aNiO+bROn+cMOv+dMgO+eXOw where R represents a rare earth element such as Dy, M represents a metal element such as Mn, and X represents a sintering aid component containing Si. Ni is uniformly solid-solved in crystal grains, and the solid-solution region of the rare earth element in the crystal grains is an average 10% or less in terms of a cross section ratio. 0.96?m?1.030, 0.05?a?3, 0.1?b?1.5, 0.1?c?1.0, 0.1?d?1.5, and 0.05?e?3.5 are satisfied. A laminated ceramic capacitor has dielectric layers formed of the dielectric ceramic. As a result, a dielectric ceramic, and a laminated ceramic capacitor having excellent AC voltage characteristics, capable of keeping desired dielectric characteristics and excellent temperature characteristics, and having excellent withstand voltage and capable of ensuring reliability can be realized.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: March 22, 2011
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takehisa Sasabayashi, Tomoyuki Nakamura, Masayuki Ishihara, Takayuki Yao
  • Publication number: 20100271751
    Abstract: In a multilayer ceramic electronic component, in an exposed area defined by exposed portions of a plurality of internal conductors, an area ratio of exposed portions in an end section of the exposed area is smaller than that of exposed portions in a center section of the exposed area.
    Type: Application
    Filed: April 23, 2010
    Publication date: October 28, 2010
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventor: Takehisa SASABAYASHI
  • Patent number: 7796373
    Abstract: A dielectric ceramic represented by a general formula: 100BamTiO3+aROn+bMOv+cXOw (where R represents a rare earth element, M represents a predetermined metal element, and n, v, and w represent independently a positive number determined in accordance with the valences of the elements R and M and a sintering aid component X, respectively), and the solid solution regions of the secondary components in the main phase grains are 10% or less (including 0%) on average in terms of a cross-sectional area ratio. The sintering aid component X contains at least Si, and m, a, b, and c satisfy 0.995?m?1.030, 0.1?a?2.0, 0.1?b?3.0, and 0.1?c?5.0. In a monolithic ceramic capacitor, dielectric layers are formed from the above-described dielectric ceramic.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: September 14, 2010
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takehisa Sasabayashi, Tomoyuki Nakamura, Takayuki Yao, Masayuki Ishihara
  • Publication number: 20100165541
    Abstract: A dielectric ceramic contains a BaTiO3-based compound as a main ingredient, and can be represented by the general formula: 100AmBO3+aNiO+bROn+cMOv+dMgO+eXOw where R represents a rare earth element such as Dy, M represents a metal element such as Mn, and X represents a sintering aid component containing Si. Ni is uniformly solid-solved in crystal grains, and the solid-solution region of the rare earth element in the crystal grains is an average 10% or less in terms of a cross section ratio. 0.96?m?1.030, 0.05?a?3, 0.1?b?1.5, 0.1?c?1.0, 0.1?d?1.5, and 0.05?e?3.5 are satisfied. A laminated ceramic capacitor has dielectric layers formed of the dielectric ceramic. As a result, a dielectric ceramic, and a laminated ceramic capacitor having excellent AC voltage characteristics, capable of keeping desired dielectric characteristics and excellent temperature characteristics, and having excellent withstand voltage and capable of ensuring reliability can be realized.
    Type: Application
    Filed: March 15, 2010
    Publication date: July 1, 2010
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Takehisa Sasabayashi, Tomoyuki Nakamura, Masayuki Ishihara, Takayuki Yao
  • Publication number: 20100053843
    Abstract: A dielectric ceramic contains a barium titanate and Li. In the dielectric ceramic, the following inequalities are satisfied: 0.5?e?6.0, 0.06<Rg<0.17, and ?g<0.075, where e is the content, in molar parts, of Li with respect to 100 molar parts of the titanate; Rg is the average size, in ?m, of grains in the dielectric ceramic; and ?g is the standard deviation, in ?m, of the size of the grains.
    Type: Application
    Filed: August 13, 2009
    Publication date: March 4, 2010
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Tomonori Muraki, Tomoyuki Nakamura, Makoto Matsuda, Hironori Suzuki, Takehisa Sasabayashi, Masayuki Ishihara, Akihiro Shiota
  • Publication number: 20100014210
    Abstract: A dielectric ceramic material is composed of a perovskite compound represented by ABO3 as a main component. In the case where ABO3 is, for example, BaTiO3, the crystal grains include BaTiO3 crystal grains composed of the main component and, as secondary phases, Mg—Ni—Ti-containing crystalline grains composed of a crystalline oxide containing at least Mg, Ni, and Ti and Ba—Si-containing crystalline grains composed of a crystalline oxide containing at least Ba and Si.
    Type: Application
    Filed: July 9, 2009
    Publication date: January 21, 2010
    Applicant: Murata Manufacturing Co., Ltd. (Corporation of Japan)
    Inventors: Tomoyuki Nakamura, Hironori Suzuki, Tomonori Muraki, Masayuki Ishihara, Makoto Matsuda, Takehisa Sasabayashi, Akihiro Shiota
  • Publication number: 20100008017
    Abstract: A laminated ceramic electronic component includes first internal electrodes and second internal electrodes that overlap each other through ceramic layers, each of the first and second internal electrodes having first and second effective portions, first and second connecting portions, and first and second extended portions whose film thickness is greater than that of the first and second connecting portions and which are exposed at the outer surface of a ceramic element assembly. When distances from side surfaces of the ceramic assembly on which first and second external electrodes are provided to the inner edges of the first and second extended portions are defined as L1 and L2, respectively, and a distance between side surfaces and the end of the second internal electrode or the end of the first internal electrode is defined as G2 or G1, G2>L1 and G1>L2 are satisfied.
    Type: Application
    Filed: June 23, 2009
    Publication date: January 14, 2010
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Tsuyoshi Ito, Takehisa Sasabayashi
  • Publication number: 20090310279
    Abstract: A dielectric ceramic represented by a general formula: 100BamTiO3+aROn+bMOv+cXOw (where R represents a rare earth element, M represents a predetermined metal element, and n, v, and w represent independently a positive number determined in accordance with the valences of the elements R and M and a sintering aid component X, respectively), and the solid solution regions of the secondary components in the main phase grains are 10% or less (including 0%) on average in terms of a cross-sectional area ratio. The sintering aid component X contains at least Si, and m, a, b, and c satisfy 0.995?m?1.030, 0.1?a?2.0, 0.1?b?3.0, and 0.1?c?5.0. In a monolithic ceramic capacitor, dielectric layers are formed from the above-described dielectric ceramic.
    Type: Application
    Filed: August 26, 2009
    Publication date: December 17, 2009
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Takehisa Sasabayashi, Tomoyuki Nakamura, Takayuki Yao, Masayuki Ishihara
  • Patent number: 7501371
    Abstract: Dielectric ceramic having a high dielectric constant of 5,500 or more and exhibiting good dielectric constant temperature characteristic, and a small, high-capacitance monolithic ceramic capacitor having an electrostatic capacitance temperature characteristic satisfying the X5R characteristic are provided. The dielectric ceramic includes a BaTiO3 based or (Ba,Ca)TiO3 based primary component, a rare-earth element and Cu, and has a structure composed of crystal grains and grain boundaries between the crystal grains.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: March 10, 2009
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takehisa Sasabayashi, Masayuki Ishihara, Tomoyuki Nakamura, Harunobu Sano