Patents by Inventor Masao Miyamura
Masao Miyamura 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).
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Publication number: 20240124956Abstract: A TiAl alloy material containing: Al: 42.0 atomic % or more and 44.0 atomic % or less; Cu: 0.5 atomic % or more and 2.5 atomic % or less; and Nb: 3.0 atomic % or more and 7.0 atomic % or less, with the balance being Ti and unavoidable impurities, and lamellar grains have an average grain size of 20 ?m or more and 200 ?m or less.Type: ApplicationFiled: October 10, 2023Publication date: April 18, 2024Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.), TOKYO INSTITUTE OF TECHNOLOGYInventors: Takeo MIYAMURA, Masao TAKEYAMA, Hirotoyo NAKASHIMA
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Publication number: 20150338552Abstract: An optical component includes a transparent base body, an anti-reflection coating stacked on the transparent base body, and an anti-smudge coating stacked on the anti-reflection coating. The surface roughness Ra of the anti-smudge coating is 3 nm or less.Type: ApplicationFiled: August 3, 2015Publication date: November 26, 2015Applicant: Asahi Glass Company, LimitedInventors: Kensuke Fujii, Takaaki Murakami, Akihiko Yoshihara, Masao Miyamura
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Publication number: 20150030761Abstract: To provide an apparatus and process capable of continuously forming a fluorinated organosilicon compound thin film having high durability while a substrate is transported.Type: ApplicationFiled: August 22, 2014Publication date: January 29, 2015Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Ryosuke KATO, Masao Miyamura, Tamotsu Morimoto
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Publication number: 20140057051Abstract: To provide a process and apparatus whereby a fluorinated organosilicon compound thin film having high durability can be produced, and a film formation step can be carried out continuously. A process for producing a fluorinated organosilicon compound thin film, which comprises the following steps (a) to (c) sequentially in this order, and an apparatus useful for the process: (a) a heating step of heating a fluorinated organosilicon compound in a heating container to a vapor deposition initiation temperature, (b) a pretreatment step of discharging a vapor from the fluorinated organosilicon compound after reaching the vapor deposition initiation temperature, and (c) a deposition step of forming a fluorinated organosilicon compound thin film by supplying a vapor of the fluorinated organosilicon compound after the pretreatment step on a substrate in a vacuum chamber.Type: ApplicationFiled: October 30, 2013Publication date: February 27, 2014Applicant: Asahi Glass Company, LimitedInventors: Ryosuke KATO, Masao Miyamura, Tamotsu Morimoto
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Patent number: 8159768Abstract: A method for detecting a servo address mark (SAM) of a servo sector of a disk of a disk drive during a servo field sync-up operation is disclosed. The method includes: detecting a start of a preamble; opening a SAM search window to detect the SAM; and continuing to detect the presence of the preamble during a SAM search time period. Further, the method discloses that: if the preamble is detected, the SAM search window is continued; and if the preamble is not detected, and the SAM is not detected, the SAM search window is closed.Type: GrantFiled: June 25, 2008Date of Patent: April 17, 2012Assignee: Western Digital Technologies, Inc.Inventor: Masao Miyamura
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Patent number: 7688700Abstract: A phase correction element comprising a first phase correction layer formed in a region of numerical aperture NA2, and a first phase plate; the first phase correction layer comprising a concavo-convex portion having a rotational symmetry with respect to the optical axis of incident light and having a cross-sectional shape of a saw-tooth-form or a saw-tooth-form whose convex portions are each approximated by a step form; the first phase plate generating a birefringent phase difference of about an odd number times of ?/2 for linearly polarized light of ?1; and the phase correction element that does change a transmitted wavefront of ?1 and changing a transmitted wavefront of the ?2 or transmitted wavefront of both wavelengths of ?2 and ?3 when three types of incident light at ?1=410 nm, ?2=650 nm and ?3=780 nm respectively, are incident.Type: GrantFiled: January 31, 2005Date of Patent: March 30, 2010Assignee: Asahi Glass Company, LimitedInventors: Yoshiharu Ooi, Masahiro Murakawa, Hiromasa Sato, Masao Miyamura
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Publication number: 20100020671Abstract: The present invention provides a phase correction element which can be used for recording and/or reproducing an information of three types of optical disks for HD, DVD and CD by employing a single objective lens for HD, and an optical head device.Type: ApplicationFiled: January 31, 2005Publication date: January 28, 2010Applicant: ASAHI GLASS COMPANY LIMITEDInventors: Yoshiharu Ooi, Masahiro Murakawa, Hiromasa Sato, Masao Miyamura
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Patent number: 7492546Abstract: A disk drive comprising a moveable head, a disk, and a servo controller to control track following operations is disclosed. The disk includes a plurality of tracks in which a substantial majority of the tracks include a plurality of servo sectors utilized in track following operations. The servo controller implements a program during power-up to: calculate servo position correction values using a set of servo position correction coefficients that have been pre-selected for the disk drive based upon the class of disk drive in which the set of servo position correction coefficients have been coded into the program; store the servo position correction values in a pre-determined servo position correction look-up table in memory; and utilize the pre-determined servo bursts correction look-up table to track follow on a reserved track of the disk.Type: GrantFiled: June 13, 2007Date of Patent: February 17, 2009Assignee: Western Digital Technologies, Inc.Inventor: Masao Miyamura
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Patent number: 7388728Abstract: A perpendicular media recording (PMR) servo track writer (STW) system and method for writing servo sectors onto a disk is disclosed. The servo writer includes a head positioner to position a head of a head disk assembly (HDA) relative to a disk, wherein the head writes servo sectors onto the disk with a perpendicular flux. The servo writer includes a controller to control the head positioner such that the head writes servo sectors onto the disk from one of an inner diameter (ID) or an outer diameter (OD) of the disk to a middle diameter (MD) of the disk, respectively, followed by writing servo sectors between the other of the OD or the ID of the disk to the MD of the disk, respectively.Type: GrantFiled: September 22, 2006Date of Patent: June 17, 2008Assignee: Western Digital Technologies, Inc.Inventors: Teddy T. C. Chen, Jinsheng Bill Jang, Jie Yu, Masao Miyamura
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Patent number: 7110208Abstract: A method is disclosed for improving servo performance in a disk drive having a plurality of concentric tracks. Each track has a plurality of first-type servo sectors and a plurality of second-type servo sectors. In the method, track identification information and track position information are read from a first-type servo sector. A track number and a transducer position are estimated for a second-type servo sector. Track position information is read from the immediately following second-type servo sector. An odd/even property from the second-type servo sector is compared with an odd/even property for the estimated track number. The odd/even property of the estimated track number is conditionally adjusted such that the odd/even property of the estimated track number matches the odd/even property from the second-type servo sector. A position error signal is determined using the adjusted track number and the track position information read from the second-type servo sector.Type: GrantFiled: July 30, 2004Date of Patent: September 19, 2006Assignee: Western Digital Technologies, Inc.Inventors: Masao Miyamura, David D. Nguyen
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Patent number: 6995941Abstract: A method is disclosed for improving head position determination in a disk drive having a transducer head and a rotating disk with a plurality of embedded servo wedges for defining a plurality of concentric data tracks. Each servo wedge has a plurality of servo bursts for providing radial track position information. In the method, the servo bursts within a servo wedge are read and a burst amplitude is determined for each servo burst. The burst amplitudes are compared to determine a radial servo position zone. A fine radial head position within the radial servo position zone is determined based on a ratio having a numerator consisting of an algebraic sum and difference of the burst amplitudes and a denominator consisting of an algebraic difference between a largest burst amplitude and a smallest burst amplitude.Type: GrantFiled: January 7, 2005Date of Patent: February 7, 2006Assignee: Western Digital Technologies, Inc.Inventors: Masao Miyamura, David Dung Tien Nguyen
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Publication number: 20050226122Abstract: The present invention provides a phase correction element which can be used for recording and/or reproducing an information of three types of optical disks for HD, DVD and CD by employing a single objective lens for HD, and an optical head device.Type: ApplicationFiled: January 31, 2005Publication date: October 13, 2005Applicant: ASAHI GLASS COMPANY LIMITEDInventors: Yoshiharu Ooi, Masahiro Murakawa, Hiromasa Sato, Masao Miyamura
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Publication number: 20040182701Abstract: A sputtering apparatus for producing a mixed film having a stoichiometrically complete composition and a refractive index corresponding to a designed value without reducing the film deposition rate, a mixed film produced by such sputtering apparatus and a multilayer film including the mixed film are provided.Type: ApplicationFiled: January 28, 2004Publication date: September 23, 2004Applicant: Aashi Glass Company, LimitedInventor: Masao Miyamura
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Patent number: 6635155Abstract: A method for forming an optical thin film having multiple optical layers on the surface of a substrate using a magnetron sputtering apparatus with a sputtering chamber having cathodes, the substrate, and at least two kinds of targets disposed therein. An inert gas and a reactive gas are introduced into the sputtering chamber to form at least some of the multiple optical layers on the substrate by successively alternately repeatedly forming at least two kinds of optical layers each having a different optical constant by means of the reactive magnetron sputtering apparatus under a condition of a discharge pressure being no greater than 1.3×10−1 Pa.Type: GrantFiled: October 19, 2001Date of Patent: October 21, 2003Assignee: Asahi Glass Company, LimitedInventors: Masao Miyamura, Kazuhiko Mitarai, Satoru Takaki
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Publication number: 20020108848Abstract: Object: To provide a method for preparing an optical thin film having multiple optical layers with little inclusion of impurities and having a high density.Type: ApplicationFiled: October 19, 2001Publication date: August 15, 2002Applicant: Asahi Glass Company, LimitedInventors: Masao Miyamura, Kazuhiko Mitarai, Satoru Takaki
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Patent number: 5679473Abstract: A magnetic recording medium having a magnetic thin film, wherein crystal grains constituting the magnetic thin film are separated by a crystal boundary region containing a non-ferromagnetic and non-metallic phase. The magnetic recording medium of the present invention provides a high coercivity and a remarkably reduced media noise property, and a high productivity in the mass production thereof.Type: GrantFiled: March 22, 1995Date of Patent: October 21, 1997Assignee: Asahi Komag Co., Ltd.Inventors: Akihiro Murayama, Masao Miyamura, Shinji Kondoh
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Patent number: 5478661Abstract: A magnetic recording medium having a magnetic thin film represented by the formula Co.sub.100-a-b-x-y-z Ni.sub.a Cr.sub.b Pt.sub.x M.sub.y Oz wherein a, b, x, y and z are atomic % satisfying 0.ltoreq.a.ltoreq.15, 0.ltoreq.b.ltoreq.15, 0<x.ltoreq.20, 0<y .ltoreq.20, 0<z.ltoreq.40, y+z.ltoreq.40, and a+b+x+y+z.ltoreq.60, and M is at least one element selected from the group consisting of Si, B, Zr, Al, Y, P, Ti, Sn and In.Type: GrantFiled: April 1, 1993Date of Patent: December 26, 1995Assignee: AG Technology Co., Ltd.Inventors: Akihiro Murayama, Masao Miyamura
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Patent number: 4611121Abstract: Magnet apparatus for providing a magnetic field having a gradient in an operation chamber comprising a cylindrical permanent magnet surrounding an outer periphery of the operation chamber and having opposite ends and a hollow interior, and a subsidiary yoke at one of the ends, the subsidiary yoke having a cylindrical portion extending into the hollow interior. The subsidiary yoke can include a flange portion. The cylindrical portion is inserted through the flange portion and fixed thereto with bolts. The permanent magnet can be made of Ba-ferrite, Sr-ferrite or the like.Type: GrantFiled: April 18, 1984Date of Patent: September 9, 1986Assignees: Nihon Shinku Gijutsu Kabushiki Kaisha, Daido Tokushuko Kabushiki KaishaInventors: Masao Miyamura, Osamu Tsukakoshi, Yoshio Kamata, Shoji Aiba