Patents by Inventor Masahiro Katsumura
Masahiro Katsumura 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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Patent number: 8335146Abstract: A master disk exposing apparatus having: a turntable for rotating a master disk; moving means for horizontally moving the turntable in at least one direction; beam irradiating means for irradiating an electron beam toward the turntable, thereby forming a beam spot onto the turntable or the master disk; beam deflecting means for deflecting the beam; and control means for controlling the moving means, the beam irradiating means, and the beam deflecting means, wherein the control means includes initializing means for executing an initial operation to drive at least either the moving means or the beam deflecting means and make an origin of the beam spot coincide with a rotational center of the turntable at the time of activation. An apparatus and a method for easily adjusting a deviation between an origin of an irradiating position of the recording beam and the rotational center of the turntable are, thus, provided.Type: GrantFiled: March 22, 2007Date of Patent: December 18, 2012Assignee: NuFlare Technology, Inc.Inventor: Masahiro Katsumura
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Patent number: 8192194Abstract: A mold is provided, at an outer circumferential region thereof, with portions to be gripped, to allow a transfer apparatus to perform transferring to an object. The portions to be gripped are formed in a different shape from the remaining portion of the outer circumferential region. For a mold set including two molds, each of the molds is provided, at an outer circumferential region thereof, with portions to be gripped, to allow the transfer apparatus to perform transferring to the object. The portions to be gripped are formed in a different shape from the remaining portion of the outer circumferential region. The portions to be gripped of one of the molds and the portions to be gripped of the other mold are disposed at different angular positions.Type: GrantFiled: January 29, 2009Date of Patent: June 5, 2012Assignee: Pioneer CorporationInventors: Kazunobu Hashimoto, Tetsuya Imai, Osamu Kasono, Masahiro Katsumura
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Publication number: 20110272850Abstract: A mold is provided, at an outer circumferential region thereof, with portions to be gripped, to allow a transfer apparatus to perform transferring to an object. The portions to be gripped are formed in a different shape from the remaining portion of the outer circumferential region. For a mold set including two molds, each of the molds is provided, at an outer circumferential region thereof, with portions to be gripped, to allow the transfer apparatus to perform transferring to the object. The portions to be gripped are formed in a different shape from the remaining portion of the outer circumferential region. The portions to be gripped of one of the molds and the portions to be gripped of the other mold are disposed at different angular positions.Type: ApplicationFiled: January 29, 2009Publication date: November 10, 2011Applicant: PIONEER CORPORATIONInventors: Kazunobu Hashimoto, Tetsuya Imai, Osamu Kasono, Masahiro Katsumura
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Publication number: 20100009025Abstract: A mold of this invention comprises a base portion, and a pattern portion provided so as to protrude from a main face of the base portion, the base portion and the pattern portion being formed from different materials. By this means, a mold with the rigidity to withstand pressing forces during pattern transfer is provided.Type: ApplicationFiled: March 22, 2007Publication date: January 14, 2010Inventor: Masahiro Katsumura
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Patent number: 7632628Abstract: The present invention relates to a stamper used for an injection molding of a resin material and a manufacturing method thereof. It is provided with such stamper as being excellent in durability in use without causing corrosion at a portion contacting with the resin material, wherein an anti-corrosion film made of any one of alloy selected from a nickel alloy, a silver alloy or a copper alloy is formed on a surface of the stamper contacting with the resin material. Further, it is provided with a method comprising steps of: forming anti-corrosion film on the surface of a mold for manufacturing the stamper; forming the stamper on the anti-corrosion film; and separating the stamper and the anti-corrosion film in a body from the mold.Type: GrantFiled: April 7, 2004Date of Patent: December 15, 2009Assignee: Pioneer CorporationInventors: Tetsuya Iida, Masahiro Katsumura
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Publication number: 20090204983Abstract: A master disk exposing apparatus having: a turntable for rotating a master disk; moving means for horizontally moving the turntable in at least one direction; beam irradiating means for irradiating an electron beam toward the turntable, thereby forming a beam spot onto the turntable or the master disk; beam deflecting means for deflecting the beam; and control means for controlling the moving means, the beam irradiating means, and the beam deflecting means, wherein the control means includes initializing means for executing an initial operation to drive at least either the moving means or the beam deflecting means and make an origin of the beam spot coincide with a rotational center of the turntable at the time of activation. An apparatus and a method for easily adjusting a deviation between an origin of an irradiating position of the recording beam and the rotational center of the turntable are, thus, provided.Type: ApplicationFiled: March 22, 2007Publication date: August 13, 2009Inventor: Masahiro Katsumura
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Patent number: 7554896Abstract: An electron beam recording apparatus provided with control means for forming a latent image in a resist layer on a disk substrate corresponding to a predetermined pattern by controlling the irradiation position of an electron beam irradiation unit on the surface of the resist layer in accordance with the rotation angle of the disk substrate by a rotational drive unit, the shift position by a shift drive unit and the recording data that represent the predetermined pattern, and beam-adjusting means for irradiating an electron beam so as to spread over a plurality of tracks in the direction of traversing the tracks in response to the irradiation position control due to the control means, and an electron beam recording method using the apparatus.Type: GrantFiled: March 22, 2005Date of Patent: June 30, 2009Assignee: Pioneer CorporationInventor: Masahiro Katsumura
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Publication number: 20080226946Abstract: A magnetic disc has a data area including a magnetic data zone and nonmagnetic portions for physically separating the magnetic data zone, and also has a servo area provided with a magnetic pattern made up of magnetic portions and nonmagnetic portions. The servo area includes a belt-like area elongated in a radial direction of the magnetic disc and having a circumferential length at least twice as long as a unit length readable by a magnetic head in a circumferential direction of the magnetic disc. The belt-like area is provided with magnetic regions and nonmagnetic regions alternating with each other in the radial direction of the disc, where each of the magnetic and nonmagnetic regions extends from the first end to the second end of the belt-like area that are spaced from each other in the circumferential direction of the disc.Type: ApplicationFiled: March 17, 2008Publication date: September 18, 2008Applicants: FUJITSU LIMITED, PIONEER CORPORATIONInventors: Mineo Moribe, Takahiro Umada, Yasuo Hosoda, Kazunobu Hashimoto, Masahiro Katsumura
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Publication number: 20070286036Abstract: An electron beam recording apparatus provided with control means for forming a latent image in a resist layer on a disk substrate corresponding to a predetermined pattern by controlling the irradiation position of an electron beam irradiation unit on the surface of the resist layer in accordance with the rotation angle of the disk substrate by a rotational drive unit, the shift position by a shift drive unit and the recording data that represent the predetermined pattern, and beam-adjusting means for irradiating an electron beam so as to spread over a plurality of tracks in the direction of traversing the tracks in response to the irradiation position control due to the control means, and an electron beam recording method using the apparatus.Type: ApplicationFiled: March 22, 2005Publication date: December 13, 2007Inventor: Masahiro Katsumura
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Patent number: 7276692Abstract: A beam adjusting sample having a flat surface being like a plate and having two edges orthogonal to each other is employed. A beam is applied to the beam adjusting sample to detect an amount of the beam passing through the beam adjusting sample. The beam vertically scans the two edges.Type: GrantFiled: October 7, 2003Date of Patent: October 2, 2007Assignee: Pioneer CorporationInventors: Masahiro Katsumura, Yoshiaki Kojima, Yasumitsu Wada, Hiroaki Kitahara
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Patent number: 7225192Abstract: A hybrid recording medium includes a read-only area in which a file is previously recorded, and a write area capable of updating and recording the file, characterized in that volume configuration information 21 and VTOC 22 about a file system are recorded in the write area is used in an information record apparatus.Type: GrantFiled: March 26, 2001Date of Patent: May 29, 2007Assignee: Pioneer CorporationInventors: Akihiro Tozaki, Masahiro Katsumura, Kiyoshi Takei, Teruo Baba, Manahiko Hashiotani, Masami Suzuki, Tohru Kanegae
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Publication number: 20060187804Abstract: The present invention relates to a stamper used for an injection molding of a resin material and a manufacturing method thereof. It is provided with such stamper as being excellent in durability in use without causing corrosion at a portion contacting with the resin material, wherein an anti-corrosion film made of any one of alloy selected from a nickel alloy, a silver alloy or a copper alloy is formed on a surface of the stamper contacting with the resin material. Further, it is provided with a method comprising steps of: forming anti-corrosion film on the surface of a mold for manufacturing the stamper; forming the stamper on the anti-corrosion film; and separating the stamper and the anti-corrosion film in a body from the mold.Type: ApplicationFiled: April 7, 2004Publication date: August 24, 2006Inventors: Tetsuya Iida, Masahiro Katsumura
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Patent number: 7065034Abstract: A master-disc-manufacturing apparatus includes an electron-beam emitting portion for emitting an electron beam, an electron-beam converging portion for converging an electron beam, a retarding voltage applying portion for applying a substrate with a negative potential having a magnitude of decelerating the electron beam, and a vacuum atmosphere producing portion for evacuating a chamber to produce a vacuum atmosphere therein.Type: GrantFiled: February 15, 2005Date of Patent: June 20, 2006Assignee: Pioneer CorporationInventor: Masahiro Katsumura
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Publication number: 20050201261Abstract: A master-disc-manufacturing apparatus includes an electron-beam emitting portion for emitting an electron beam, an electron-beam converging portion for converging an electron beam, a retarding voltage applying portion for applying a substrate with a negative potential having a magnitude of decelerating the electron beam, and a vacuum atmosphere producing portion for evacuating a chamber to produce a vacuum atmosphere therein.Type: ApplicationFiled: February 15, 2005Publication date: September 15, 2005Inventor: Masahiro Katsumura
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Patent number: 6882615Abstract: A master-disc-manufacturing apparatus includes an electron-beam emitting portion for emitting an electron beam, an electron-beam converging portion for converging an electron beam, a retarding voltage applying portion for applying a substrate with a negative potential having a magnitude of decelerating the electron beam, and a vacuum atmosphere producing portion for evacuating a chamber to produce a vacuum atmosphere therein.Type: GrantFiled: October 29, 2001Date of Patent: April 19, 2005Assignee: Pioneer CorporationInventor: Masahiro Katsumura
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Patent number: 6849390Abstract: A stamper-forming electrode material contains Cu as its main ingredient and at least one other element, preferably Ag and/or Ti. It is preferred that the Ag content be 10.0 wt % or less and that the Ti content be 5.0 wt % or less. A stamper-forming thin film is made of this stamper-forming electrode material, whereby its corrosion resistance is improved to suppress damage to itself, and a high-quality stamper can hence be formed.Type: GrantFiled: February 4, 2002Date of Patent: February 1, 2005Assignee: Pioneer CorporationInventors: Masahiro Katsumura, Tetsuya Iida, Nobuhiro Oda, Takashi Ueno
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Publication number: 20040069952Abstract: A beam adjusting sample having a flat surface being like a plate and having two edges orthogonal to each other is employed. A beam is applied to the beam adjusting sample to detect an amount of the beam passing through the beam adjusting sample. The beam vertically scans the two edges.Type: ApplicationFiled: October 7, 2003Publication date: April 15, 2004Applicant: PIONEER CORPORATIONInventors: Masahiro Katsumura, Yoshiaki Kojima, Yasumitsu Wada, Hiroaki Kitahara
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Patent number: 6695987Abstract: The present invention is to provide a production method for an optical disc, capable of obtaining a good S/N ratio without deterioration of the stamper quality due to reaction with an electron attractive group contained in a resist material. The processes of forming a resist film on a substrate, patterning the resist film on the substrate by an electron beam cutting, forming a nickel alloy thin film on the patterned resist film, forming a nickel layer on the nickel alloy thin film by the electrocasting, and injection molding of a resin, using the nickel layer peeled off from the nickel alloy thin film as a stamper, are provided. The nickel alloy thin film has a composition containing Ni element as the main component as well as Ru element by less than 25% by weight.Type: GrantFiled: May 14, 2001Date of Patent: February 24, 2004Assignees: Pioneer Corporation, Furuya Metal Co., Ltd.Inventors: Masahiro Katsumura, Tetsuya Iida, Takashi Ueno
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Patent number: 6657934Abstract: An information recording apparatus and a method therefor which can form a beam guide groove in the shape of highly accurate rectangle having abrupt edges. A recording mark is formed by exposing a recording medium with a recording beam having a beam diameter smaller than the beam guide groove, while periodically vibrating the recording beam in a direction perpendicular to a recording track on the recording medium, or in both horizontal and vertical directions of the recording track.Type: GrantFiled: February 20, 2001Date of Patent: December 2, 2003Assignee: Pioneer CorporationInventor: Masahiro Katsumura
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Patent number: D964277Type: GrantFiled: September 11, 2020Date of Patent: September 20, 2022Assignee: Mitsubishi Electric CorporationInventors: Daisuke Goto, Masahiro Katsumura, Takeshi Obara