Patents Assigned to Akita Prefecture
  • Patent number: 7332848
    Abstract: An actuator includes a piezoelectric element, and a displacement enlargement mechanism which has a movable portion configured to be displaced as the piezoelectric element is displaced and enlarges an amount of displacement of the piezoelectric element. A restraint member is fixed to the movable portion with an elastic or viscoelastic body therebetween and convert vibrational energy of the movable portion into thermal energy based on deformation of the elastic or viscoelastic body, thereby lowering a resonance peak amplitude of the actuator.
    Type: Grant
    Filed: March 24, 2006
    Date of Patent: February 19, 2008
    Assignee: Akita Prefecture
    Inventor: Shigeki Mori
  • Publication number: 20070243420
    Abstract: A magnetic recording medium has a recording layer formed of a magnetic material represented by the following general formula: [(Co1-mPtm)1-nCrn]100-x-yTixOy, where m and n are atomic ratios, m is 0.2 or more and 0.4 or less, n is 0 or more and 0.1 or less, x is 9 at. % or more and 13 at. % or less, and y/x is 1.8 or more and 2.3 or less.
    Type: Application
    Filed: October 4, 2005
    Publication date: October 18, 2007
    Applicants: JAPAN SCIENCE AND TECHNOLOGY AGENCY, AKITA PREFECTURE, a government agency of Japan
    Inventors: Takashi Chiba, Jun Ariake, Naoki Honda
  • Publication number: 20060175936
    Abstract: An actuator includes a piezoelectric element, and a displacement enlargement mechanism which has a movable portion configured to be displaced as the piezoelectric element is displaced and enlarges an amount of displacement of the piezoelectric element. A restraint member is fixed to the movable portion with an elastic or viscoelastic body therebetween and convert vibrational energy of the movable portion into thermal energy based on deformation of the elastic or viscoelastic body, thereby lowering a resonance peak amplitude of the actuator.
    Type: Application
    Filed: March 24, 2006
    Publication date: August 10, 2006
    Applicant: Akita Prefecture
    Inventor: Shigeki Mori
  • Publication number: 20050040050
    Abstract: A polishing apparatus for polishing a workpiece by utilizing a fluid including abrasive particles having a dielectric property. The polishing apparatus includes an electrode for applying processing pressure to the abrasive particles on the workpiece and having electrode elements for collecting and arranging the abrasive particles by a Coulomb force produced by application of an alternating-current voltage to the electrode, and a driving device for driving the electrode.
    Type: Application
    Filed: October 7, 2004
    Publication date: February 24, 2005
    Applicant: Governor of Akita prefecture
    Inventors: Yoichi Akagami, Yukichi Satou, Chikayoshi Yamamoto
  • Patent number: 6857940
    Abstract: A polishing method with a polishing apparatus includes an electrode constituted as a plurality of electrode elements, a device of driving the electrode, and dielectric abrasive particles disposed between the electrode and a workpiece. Polishing pressure is applied to the particles by a Coulomb force generated when an alternating-current voltage is applied to the electrode.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: February 22, 2005
    Assignee: Governor of Akita prefecture
    Inventors: Yoichi Akagami, Yukichi Satou, Chikayoshi Yamamoto
  • Publication number: 20040166369
    Abstract: A high saturation flux density soft magnetic film substantially consists of an FexCo1-x alloy (0.65≦x≦0.75) containing 3% or less of Al2O3.
    Type: Application
    Filed: February 27, 2004
    Publication date: August 26, 2004
    Applicant: Akita Prefecture
    Inventors: Kazuhiko Shintaku, Kiyoshi Yamakawa, Kazuhiro Ouchi
  • Patent number: 6641934
    Abstract: To present an information recording medium for achieving high density information recording, in particular, a high signal output and a high resolution in magnetic recording, for example, an information recording medium sequentially forming a layer made of soft magnetic material, a layer made of nonmagnetic material, and an information recording layer of ordered alloy with L10 crystal structure selected from group A is manufactured in a specified manufacturing method. Herein the group A is defined to include FePt ordered alloy, CoPt ordered alloy, FePd ordered alloy, and their alloy.
    Type: Grant
    Filed: August 17, 2000
    Date of Patent: November 4, 2003
    Assignee: Governor of Akita Prefecture
    Inventors: Toshio Suzuki, Naoki Honda, Kazuhiro Ouchi
  • Patent number: 6599646
    Abstract: An information recording layer consisting of a composite of an ordered alloy of L10 crystal structure selected from a group A, and MgO is used for a perpendicular magnetic recording medium. The group A includes an FePt ordered alloy, a CoPt ordered alloy, an FePd ordered alloy and an alloy thereof. This information recording layer has a very small magnetic domain structure and allows high density recording as seen from a signal output spectrum showing a result of a recording and reproducing evaluation of a magnetic recording medium in one example. The information recording layer can be formed at lower film formation temperature than a temperature of a composite thin film of an ordered alloy of L10 crystal structure according to a conventional technique.
    Type: Grant
    Filed: September 13, 2001
    Date of Patent: July 29, 2003
    Assignee: Governor of Akita Prefecture
    Inventors: Toshio Suzuki, Naoki Honda, Kazuhiro Ouchi
  • Publication number: 20030068964
    Abstract: A polishing apparatus includes an electrode constituted as a plurality of electrode elements, a device of driving the electrode, and dielectric abrasive particles disposed between the electrode and a workpiece. Polishing pressure is applied to the particles by a Coulomb force generated when an alternating-current voltage is applied to the electrode.
    Type: Application
    Filed: January 25, 2002
    Publication date: April 10, 2003
    Applicant: Governor of Akita prefecture
    Inventors: Yoichi Akagami, Yukichi Satou, Chikayoshi Yamamoto
  • Publication number: 20020041980
    Abstract: An information recording layer consisting of a composite of an ordered alloy of L10 crystal structure selected from a group A, and MgO is used for a perpendicular magnetic recording medium. The group A includes an FePt ordered alloy, a CoPt ordered alloy, an FePd ordered alloy and an alloy thereof. This information recording layer has a very small magnetic domain structure and allows high density recording as seen from a signal output spectrum showing a result of a recording and reproducing evaluation of a magnetic recording medium in one example. The information recording layer can be formed at lower film formation temperature than a temperature of a composite thin film of an ordered alloy of L10 crystal structure according to a conventional technique.
    Type: Application
    Filed: September 13, 2001
    Publication date: April 11, 2002
    Applicant: Governor of Akita Prefecture
    Inventors: Toshio Suzuki, Naoki Honda, Kazuhiro Ouchi
  • Patent number: 6091556
    Abstract: A data recording device such as a hard disk apparatus has an orthogonal coding circuit and a modulation circuit. The orthogonal coding circuit encodes recording data to be recorded to adjacent two tracks as two orthogonal code streams which are included in an Hadamard matrix. The modulation circuit outputs recording signals, which are obtained by modulating the code streams using the NRZI system, to a magnetic head. Reproduction signals read out from a magnetic disk by the magnetic head are decoded as recording data based upon given decoding rules according to the two code streams.
    Type: Grant
    Filed: March 8, 1996
    Date of Patent: July 18, 2000
    Assignee: Governor of Akita Prefecture
    Inventors: Kazuhiro Ouchi, Naoki Honda, Atsushi Kikawada
  • Patent number: 6068739
    Abstract: A method of manufacturing a data recording medium for recording and reproducing data by use of a magnetic field or light and formed of an ordered alloy thin film comprising the steps of forming at least one underlayer principally containing an element or a compound selected from the group consisting of Cr, Pt, Pd, Au, Fe, Ni, MgO, NiO and controlled in such a way that a crystal plane having a crystal lattice face of a Miller index (100) is in parallel to a substrate, and forming an ordered alloy layer with L1.sub.0 crystal structure by sputter deposition within the range satisfying Equation 1: P.times.D>3000, where P is Ar sputter-gas pressure (Pa) and D is a target-substrate distance (mm), is disclosed.
    Type: Grant
    Filed: June 9, 1999
    Date of Patent: May 30, 2000
    Assignee: Governor of Akita Prefecture
    Inventors: Toshio Suzuki, Naoki Honda, Kazuhiro Ouchi
  • Patent number: PP8354
    Abstract: Disclosed is an apple tree having a moderate habit, a good spur-bearing habit and producing a medium size fruit maturing in the middle season similar to "Golden Delicious". The fruit has a conical to long conical shape, a dull appearance of dots, and a yellow skin. The flesh of the fruit is yellow, very juicy and crisp, has a moderate sweetness and acidity, and an aromatic flavor. Particularly, the storability of the fruit is significantly higher than that of "Golden Delicious", thereby providing the fruit with an excellent market value.
    Type: Grant
    Filed: November 25, 1991
    Date of Patent: August 24, 1993
    Assignee: Akita Prefecture
    Inventors: Sadao Tanno, Jin Tanba, Hiroshi Sato, Matuyori Kagaya, Tatuo Taguchi, Tanetugu Niizuma