Patents by Inventor Yuichiro Sano

Yuichiro Sano 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: 10468071
    Abstract: Disclosed herein is a magnetic storage device that comprises a housing defining an interior cavity. The magnetic storage device also comprises at least one magnetic disk in the interior cavity of the housing. The magnetic storage device further comprises at least one read-write head in the interior cavity and configured to read data from and write data to the magnetic disk. The read-write head comprises a heat-assisted magnetic storage (HAMR) head. The magnetic storage device additionally comprises a gas, comprising oxygen and helium, sealed in the interior cavity of the housing. A percent concentration of oxygen in the gas is greater than or equal to 3%. A pressure of the gas is between 10% and 70%, inclusive, of atmospheric pressure. A relative humidity within the interior cavity is less than 5%, inclusive. A percent concentration of helium in the gas is less than or equal to 90%.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: November 5, 2019
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Kenji Tasaka, Yuichiro Sano, Ehsan Rismaniyazdi, Barry Stipe, Nobuyuki Okunaga, Erhard Schreck, Oscar Ruiz, Qing Dai, Sripathi V. Canchi, Weidong Huang, Yong Hu, Kenji Kuroki
  • Patent number: 9053725
    Abstract: A hard disk drive electronic component processes a signal from a piezoelectric actuator to identify where on a disk the slider encounters a disk defect. The signal received from the piezoelectric actuator may be based on the mechanical propagation, through the suspension to the piezoelectric actuator, of an effect of slider contact with the protrusion. Further, an actuator may be commanded to systematically move the head slider across the writeable portion of the disk to map all the protrusions on the writeable portion of the disk.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: June 9, 2015
    Assignee: HGST Netherlands B.V.
    Inventors: Yuichiro Sano, Junguo Xu, Yuka Morimoto
  • Patent number: 8873191
    Abstract: An embedded contact sensor (ECS) element for fly-height control and touchdown detection. An embedded contact sensor (ECS) element with a resistance that changes with a temperature change, which senses a clearance change between a head slider and a disk of a disk drive. A resistance measurement section, within said head IC, that determines a value of direct current resistance (DCR) of said ECS element, wherein said value of DCR changes with a temperature change, wherein said temperature change is caused by an air bearing cooling and frictional induced heating at a head disk interface. A resistance slope to fly-height conversion section that dynamically determines a target fly-height value for said head slider over said disk based on changes in said value of DCR.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: October 28, 2014
    Assignee: HGST Netherlands B.V.
    Inventors: Jianhua Li, Kenichi Kuramoto, Toshiya Shiramatsu, Yuichi Aoki, Masaru Furukawa, Yuichiro Sano
  • Publication number: 20140268386
    Abstract: An embedded contact sensor (ECS) element for fly-height control and touchdown detection. An embedded contact sensor (ECS) element with a resistance that changes with a temperature change, which senses a clearance change between a head slider and a disk of a disk drive. A resistance measurement section, within said head IC, that determines a value of direct current resistance (DCR) of said ECS element, wherein said value of DCR changes with a temperature change, wherein said temperature change is caused by an air bearing cooling and frictional induced heating at a head disk interface. A resistance slope to fly-height conversion section that dynamically determines a target fly-height value for said head slider over said disk based on changes in said value of DCR.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: HGST Netherlands B.V.
    Inventors: Jianhua Li, Kenichi Kuramoto, Toshiya Shiramatsu, Yuichi Aoki, Masaru Furukawa, Yuichiro Sano
  • Patent number: 8173336
    Abstract: The purpose of the present invention is to provide a method for transferring a pattern of a circuit pattern precursor formed of electroconductive particles containing no resin component onto an objective substrate with high transfer efficiency while retaining a pattern shape. A method of transferring the circuit pattern precursor formed from an conductive particle dispersed solution on a dielectric thin film body includes the steps of: temporarily removing a liquid film remaining around the circuit pattern precursor right after a development step; subsequently re-electrifying the electroconductive particle pattern by supplying a solvent again to the circuit pattern precursor; and then electrostatically transferring the pattern onto the objective substrate through electrophoresis in the solvent.
    Type: Grant
    Filed: July 27, 2007
    Date of Patent: May 8, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Yuichiro Sano, Toru Miyasaka
  • Patent number: 8039182
    Abstract: An object is to improve the adhesion strength between a circuit pattern and its substrate without increasing the resistance value of the circuit pattern in preparation of a circuit pattern holding substrate. A circuit pattern formation device 100 forms, after forming a precursor circuit-pattern 12 in the surface of a dielectric thin film body 4, a circuit pattern 14 onto a target substrate 23 from the dielectric thin film body. After forming an electrostatic latent image 2 in the upper surface of the dielectric thin film body, the electrostatic latent image is exposed using an exposure unit 3 to prepare a pattern. A development apparatus 7 supplies a conductive particle dispersion solution 6 to this pattern to form a precursor circuit-pattern. By energizing the circuit pattern holding substrate 8, in which an adhesive layer 22 is formed, the precursor circuit-pattern is temporarily transferred to the circuit pattern holding substrate.
    Type: Grant
    Filed: July 3, 2007
    Date of Patent: October 18, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Yuichiro Sano, Toru Miyasaka
  • Patent number: 7979005
    Abstract: An electrically conductive pattern forming apparatus has process disposition which reduces contamination of a pattern or inside of the apparatus due to backflow and leakage of a liquid material such as a developing agent or a cleaning liquid. A developing device and a cleaning device in the electrically conductive pattern forming apparatus using an electrophotographic method are disposed in a lower region about the center of a photoreceptor, a solvent removing process is disposed in a region in which the photoreceptor rotates upward, and a transfer liquid applying process and an electrostatic transfer process are disposed above the center of the photoreceptor and in a region in which the photoreceptor rotates downward.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: July 12, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Yuichiro Sano, Toru Miyasaka
  • Publication number: 20100031883
    Abstract: A conductive pattern forming apparatus using electrostatic force, by which high productivity, application to a large area and pattern change availability are achieved, without limiting a substrate nor increasing extra steps of plating and the like, with easy steps, lower cost, shorter manufacturing time and less environmental load. The conductive pattern forming apparatus is provided with an electrostatic latent image forming means for forming an electrostatic pattern on a dielectric thin film surface, and a developing means for forming the conductive pattern by development by supplying a conductive particle dispersed solution to the electrostatic latent image and bringing the solution into contact with the electrostatic latent image. The conductive particle dispersed solution is provided by dispersing conductive particles, which have ionic organic molecules adsorbed on the surface and a particle diameter of 100 nm or less, in a non-polar solvent.
    Type: Application
    Filed: January 25, 2006
    Publication date: February 11, 2010
    Inventors: Yuichiro Sano, Toru Miyasaka
  • Publication number: 20090268183
    Abstract: Apparatus for forming a conductive pattern capable of stably forming a wiring pattern of a desired thickness by providing at least one thickness detection means for detecting the thickness of a formed pattern and capable of adjusting at least one of parameters such as a developing bias voltage or a concentration of a developer that contributes to the thickness of the pattern based on the information obtained from the thickness detection means.
    Type: Application
    Filed: April 28, 2009
    Publication date: October 29, 2009
    Inventors: Yuichiro SANO, Toru MIYASAKA, Shigeo NAKAMURA
  • Patent number: 7608205
    Abstract: Microscopic particle decentralized solution having microscopic particles with different diameters are decentralized, wherein: the microscopic particle decentralized solution has two peaks in a granularity distribution, at a large diameter and a small diameter; and microscopic particle mixtures satisfying the following relationships are decentralized in the solution; R>r and n>3.84×(R/r)3×N, where R is a large particle diameter, r is a small particle diameter, N is the number of large particles, and n is the number of small particle.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: October 27, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Yuichiro Sano, Toru Miyasaka
  • Patent number: 7503645
    Abstract: A droplet generator comprising a first unit having an elongate liquid chamber one end thereof is open and at least one raw of orifices disposed in a line oppositely to the open end in the longitudinal direction of the first unit, a second unit having an elongate diaphragm provided on the bottom of the second unit and a plurality of vibrators provided within the diaphragm area, a vibrating apparatus provided on the top of the vibrators, and a stationary section to fix the vibrating apparatus. The diaphragm of the second unit is provided closely and oppositely to the open end of the liquid chamber of the first unit.
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: March 17, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Toru Miyasaka, Yuichiro Sano, Mamoru Okano, Tomohiro Inoue
  • Publication number: 20080267680
    Abstract: An electrically conductive pattern forming apparatus has process disposition which reduces contamination of a pattern or inside of the apparatus due to backflow and leakage of a liquid material such as a developing agent or a cleaning liquid. A developing device and a cleaning device in the electrically conductive pattern forming apparatus using an electrophotographic method are disposed in a lower region about the center of a photoreceptor, a solvent removing process is disposed in a region in which the photoreceptor rotates upward, and a transfer liquid applying process and an electrostatic transfer process are disposed above the center of the photoreceptor and in a region in which the photoreceptor rotates downward.
    Type: Application
    Filed: June 30, 2008
    Publication date: October 30, 2008
    Inventors: Yuichiro Sano, Toru Miyasaka
  • Publication number: 20080044749
    Abstract: An object is to improve the adhesion strength between a circuit pattern and its substrate without increasing the resistance value of the circuit pattern in preparation of a circuit pattern holding substrate. A circuit pattern formation device 100 forms, after forming a precursor circuit-pattern 12 in the surface of a dielectric thin film body 4, a circuit pattern 14 onto a target substrate 23 from the dielectric thin film body. After forming an electrostatic latent image 2 in the upper surface of the dielectric thin film body, the electrostatic latent image is exposed using an exposure unit 3 to prepare a pattern. A development apparatus 7 supplies a conductive particle dispersion solution 6 to this pattern to form a precursor circuit-pattern. By energizing the circuit pattern holding substrate 8, in which an adhesive layer 22 is formed, the precursor circuit-pattern is temporarily transferred to the circuit pattern holding substrate.
    Type: Application
    Filed: July 3, 2007
    Publication date: February 21, 2008
    Inventors: Yuichiro Sano, Toru Miyasaka
  • Publication number: 20080026307
    Abstract: The purpose of the present invention is to provide a method for transferring a pattern of a circuit pattern precursor formed of electroconductive particles containing no resin component onto an objective substrate with high transfer efficiency while retaining a pattern shape. A method of transferring the circuit pattern precursor formed from an conductive particle dispersed solution on a dielectric thin film body includes the steps of: temporarily removing a liquid film remaining around the circuit pattern precursor right after a development step; subsequently re-electrifying the electroconductive particle pattern by supplying a solvent again to the circuit pattern precursor; and then electrostatically transferring the pattern onto the objective substrate through electrophoresis in the solvent.
    Type: Application
    Filed: July 27, 2007
    Publication date: January 31, 2008
    Inventors: YUICHIRO SANO, Toru Miyasaka
  • Publication number: 20070159157
    Abstract: Microscopic particle decentralized solution having microscopic particles with different diameters are decentralized, wherein: the microscopic particle decentralized solution has two peaks in a granularity distribution, at a large diameter and a small diameter; and microscopic particle mixtures satisfying the following relationships are decentralized in the solution; R>r and n>3.84×(R/r)3×N, where R is a large particle diameter, r is a small particle diameter, N is the number of large particles, and n is the number of small particle.
    Type: Application
    Filed: September 29, 2006
    Publication date: July 12, 2007
    Inventors: Yuichiro Sano, Toru Miyasaka
  • Publication number: 20070146441
    Abstract: A droplet generator comprising a first unit having an elongate liquid chamber one end thereof is open and at least one raw of orifices disposed in a line oppositely to the open end in the longitudinal direction of the first unit, a second unit having an elongate diaphragm provided on the bottom of the second unit and a plurality of vibrators provided within the diaphragm area, a vibrating apparatus provided on the top of the vibrators, and a stationary section to fix the vibrating apparatus; wherein the diaphragm of the second unit is provided closely and oppositely to the open end of the liquid chamber of the first unit.
    Type: Application
    Filed: September 27, 2006
    Publication date: June 28, 2007
    Inventors: Toru Miyasaka, Yuichiro Sano, Mamoru Okano, Tomohiro Inoue
  • Publication number: 20060121342
    Abstract: The present invention proposes a secondary battery structure with a solid electrolyte, which can secure high reliability at a low cost and realize high energy density and high output, and also proposes a method for producing the secondary battery structure simply at a low cost while realizing reduced size and weight. The present invention provides a secondary battery structure of planar, inter digital shape as the one with a solid electrolyte, capable of realizing reduced cost, high safety, high energy density and high output, wherein anode and cathode collectors of pectinate shape are provided to face each other on a flat substrate by patterning, anode and cathode material particles are patterned on the respective anode and cathode collectors by electrophotography in the vertical direction to the collector surface to form the vertical electrodes, and the gap between the adjacent anode and cathode is filled with the solid electrolyte.
    Type: Application
    Filed: November 16, 2005
    Publication date: June 8, 2006
    Applicant: Hitachi, Ltd.
    Inventors: Yuichiro Sano, Toru Miyasaka, Shin Nishimura