Patents by Inventor Shoichi Tosaka

Shoichi Tosaka 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).

  • Publication number: 20090128275
    Abstract: An inductor 10 has a magnetic body 11 of a rectangular solid shape and a coil 12 embedded in the magnetic body 11. The coil 12 integrally has a part constituted by a helically wound coil wire, two leader parts 12a provided at the two ends of the wound part, and terminal parts 13 connected to the ends of the leader parts and wider than the leader parts 12a, where the boundary between each leader part 12a and each terminal part 13 is positioned in the magnetic body 11, and the end of each terminal part 13 is exposed from the corresponding side face of the magnetic body 11 and folded in an L shape along the side face and bottom face.
    Type: Application
    Filed: November 13, 2008
    Publication date: May 21, 2009
    Applicant: TAIYO YUDEN CO. LTD.
    Inventors: Toshiyuki Yagasaki, Tomoo Kashiwa, Hideki Ogawa, Kouichirou Wada, Yoshikazu Okino, Shoichi Tosaka
  • Patent number: 7358843
    Abstract: A device includes: a pillar-shaped core consisting of a first magnetic insulating material that has two quadric prism segments at both ends thereof symmetrically and has a cylindrical segment, which has an external shape smaller than that of the quadric prism segments, coaxially between the two quadric prism segments; a resistance film that is formed in a substantially uniform thickness so as to cover an outer circumferential face of the pillar-shaped core; a spiral line segment having a predetermined number of circumferences that is formed in a portion present on the cylindrical segment of the resistance film by subjecting a spiral sulcus to laser trimming; an oxide film that is formed to cover at least a surface of a shoulder portion extending from a side to an upper surface of lines constituting the spiral line segment; an armor consisting of a second magnetic insulating material that is formed to cover a surface of the portion present on the cylindrical segment of the resistance film and such that an exte
    Type: Grant
    Filed: September 29, 2005
    Date of Patent: April 15, 2008
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Manabu Takayama, Shoichi Tosaka, Ikuo Kakiuchi, Takashige Shiga, Masaru Maeda
  • Patent number: 7170379
    Abstract: A device includes: a pillar-shaped core consisting of a first magnetic insulating material that has two quadric prism segments at both ends thereof symmetrically and has a cylindrical segment, which has an external shape smaller than that of the quadric prism segments, coaxially between the two quadric prism segments; a conductor film that is formed in a substantially uniform thickness so as to cover an outer circumferential face of the pillar-shaped core; a spiral line segment having a predetermined number of circumferences that is formed in a portion present on the cylindrical segment of the conductor film by subjecting a spiral sulcus to laser trimming; an oxide film that is formed to cover at least a surface of a shoulder portion extending from a side to an upper surface of lines constituting the spiral line segment; an armor consisting of a second magnetic insulating material that is formed to cover a surface of the portion present on the cylindrical segment of the conductor film and such that an externa
    Type: Grant
    Filed: September 29, 2005
    Date of Patent: January 30, 2007
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Manabu Takayama, Shoichi Tosaka, Ikuo Kakiuchi, Takashige Shiga, Masaru Maeda
  • Publication number: 20060125569
    Abstract: A device includes: a pillar-shaped core consisting of a first magnetic insulating material that has two quadric prism segments at both ends thereof symmetrically and has a cylindrical segment, which has an external shape smaller than that of the quadric prism segments, coaxially between the two quadric prism segments; a resistance film that is formed in a substantially uniform thickness so as to cover an outer circumferential face of the pillar-shaped core; a spiral line segment having a predetermined number of circumferences that is formed in a portion present on the cylindrical segment of the resistance film by subjecting a spiral sulcus to laser trimming; an oxide film that is formed to cover at least a surface of a shoulder portion extending from a side to an upper surface of lines constituting the spiral line segment; an armor consisting of a second magnetic insulating material that is formed to cover a surface of the portion present on the cylindrical segment of the resistance film and such that an exte
    Type: Application
    Filed: September 29, 2005
    Publication date: June 15, 2006
    Inventors: Manabu Takayama, Shoichi Tosaka, Ikuo Kakiuchi, Takashige Shiga, Masaru Maeda
  • Patent number: 5098611
    Abstract: A fixed chip resistor or a thick-film electrical resistor provided in circuit boards and the like and, an electrical resistor obtained by sintering in a non-oxidizing atmosphere, resistance pastes for producing an electrical resistor and a method for making such resistors. The aforesaid objects are achieved by the provision of an electrical resistor obtained using at least one molybdate belonging to the following groups (A) and (G) and glass,(A) Molybdates of alkaline earth metals,(B) Molybdate of zinc,(C) Molybdate of elements, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and complex molybdates of two or more of said elements,(D) Molybdates of aluminum(E) Molybdates of elements zirconium and hafnium, and complex molybdates thereof,(F) Molybdates of elements niobium and tantalum, and complex molybdates thereof, and(G) Molybdates of manganese.
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: March 24, 1992
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Toshimitsu Honda, Tadahiko Yamada, Kazuji Onikata, Shoichi Tosaka
  • Patent number: 4970027
    Abstract: A fixed chip resistor or a thick-film electrical resistor providing in circuit boards and the like and, to an electrical resistor obtained by sintering in a non-oxidizing atmosphere, resistance pastes for producing an electrical resistor and a method for making such resistors. The aforesaid objects are achieved by the provision of an electrical resistor obtained using at least one molybdate belonging to the following groups (A) and (G) with or without a fluoride of an alkaline earth metal, and an electrical resistor paste obtained using the aforesaid components with or without a carbonate of an alkaline earth metals,(A) Molybdates of alkaline earth metals,(B) Molybdate of zinc,(C) Molybdate of elements Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and complex molybdates of two or more of said elements,(D) Molybdate of aluminum(E) Molybdates of elements zirconium and hafnium, and complex molybdates thereof, and(G) Molybdates of manganese.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: November 13, 1990
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Toshimitsu Honda, Tadahiko Yamada, Kazuji Onikata, Shoichi Tosaka
  • Patent number: 4783431
    Abstract: An insulative ceramic composition comprising from 25 to 60 wt % of Al.sub.2 O.sub.3, from 10 to 40 wt % of SiO.sub.2, from 3 to 30 wt % of from B.sub.2 O.sub.3, from 1 to 15 wt % of MgO, from 0.2 to 10 wt % of Cr.sub.2 O.sub.3, from 0.1 to 3 wt % of Li.sub.2 O, and from 1 to 20 wt % of at least one member selected from the group consisting of CaO, SrO and BaO. The ceramic composition has a small coefficient of linear expansion and can avoid cracking when undergoing thermal shock.
    Type: Grant
    Filed: July 9, 1987
    Date of Patent: November 8, 1988
    Assignee: Taiyo Yuden Kabushiki Kaisha
    Inventors: Kenichi Hoshi, Shoichi Tosaka, Takashi Yoshimi