Patents by Inventor Norikatsu Sasao

Norikatsu Sasao 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: 8916053
    Abstract: A pattern forming method according to an embodiment includes: forming a pattern film on a first substrate, the pattern film having a concave-convex pattern, the pattern film being made of a material containing a first to-be-imprinted agent; forming a material film on a second substrate, the material film containing a second to-be-imprinted agent having a higher etching rate than an etching rate of the first to-be-imprinted agent; transferring the concave-convex pattern of the pattern film onto the material film by applying pressure between the first substrate and the second substrate, with the pattern film being positioned to face the material film, and by curing the second to-be-imprinted agent; detaching the first substrate from the pattern film; and removing the material film by etching, to leave the pattern film on the second substrate.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: December 23, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshiaki Kawamonzen, Yasuaki Ootera, Akiko Yuzawa, Naoko Kihara, Yoshiyuki Kamata, Hiroyuki Hieda, Norikatsu Sasao, Ryosuke Yamamoto, Takeshi Okino, Tomoyuki Maeda, Takuya Shimada
  • Patent number: 8865010
    Abstract: In one embodiment, a pattern forming method includes: forming a functional layer having a functional group to cross-link a first polymer on a substrate; forming a diblock copolymer layer having the first polymer and a second polymer on the functional layer; self-assembling the diblock copolymer layer to form a self-assembled layer, the self-assembled layer having a first domain corresponding to the first polymer, and a plurality of second domains corresponding to the second polymer and surrounded by or interposed in the first domain; cross-linking the first polymer in the self-assembled layer with the functional group in the functional layer to form a bonding layer disposed in the self-assembled layer and bonded to the functional layer; and washing or etching the self-assembled layer to remain the bonding layer.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: October 21, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Naoko Kihara, Hiroyuki Hieda, Akiko Yuzawa, Norikatsu Sasao, Ryosuke Yamamoto, Yoshiyuki Kamata
  • Publication number: 20130256263
    Abstract: In one embodiment, a pattern forming method includes: forming a functional layer having a functional group to cross-link a first polymer on a substrate; forming a diblock copolymer layer having the first polymer and a second polymer on the functional layer; self-assembling the diblock copolymer layer to form a self-assembled layer, the self-assembled layer having a first domain corresponding to the first polymer, and a plurality of second domains corresponding to the second polymer and surrounded by or interposed in the first domain; cross-linking the first polymer in the self-assembled layer with the functional group in the functional layer to form a bonding layer disposed in the self-assembled layer and bonded to the functional layer; and washing or etching the self-assembled layer to remain the bonding layer.
    Type: Application
    Filed: January 25, 2013
    Publication date: October 3, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Naoko KIHARA, Hiroyuki Hieda, Akiko Yuzawa, Norikatsu Sasao, Ryosuke Yamamoto, Yoshiyuki Kamata
  • Publication number: 20130075361
    Abstract: A pattern forming method according to an embodiment includes: forming a pattern film on a first substrate, the pattern film having a concave-convex pattern, the pattern film being made of a material containing a first to-be-imprinted agent; forming a material film on a second substrate, the material film containing a second to-be-imprinted agent having a higher etching rate than an etching rate of the first to-be-imprinted agent; transferring the concave-convex pattern of the pattern film onto the material film by applying pressure between the first substrate and the second substrate, with the pattern film being positioned to face the material film, and by curing the second to-be-imprinted agent; detaching the first substrate from the pattern film; and removing the material film by etching, to leave the pattern film on the second substrate.
    Type: Application
    Filed: June 20, 2012
    Publication date: March 28, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshiaki KAWAMONZEN, Yasuaki OOTERA, Akiko YUZAWA, Naoko KIHARA, Yoshiyuki KAMATA, Hiroyuki HIEDA, Norikatsu SASAO, Ryosuke YAMAMOTO, Takeshi OKINO, Tomoyuki MAEDA, Takuya SHIMADA
  • Publication number: 20130069272
    Abstract: In one embodiment, a method of manufacturing a mold includes: forming a first layer having an affinity to a second polymer on a substrate having an affinity to a first polymer; forming first and second openings in the first layer; filling a resist in the second openings and hardening the resist to obtain a hardened resist; and forming a second layer containing a block copolymer and causing it to self-assemble.
    Type: Application
    Filed: March 19, 2012
    Publication date: March 21, 2013
    Inventors: Yasuaki OOTERA, Yoshiyuki KAMATA, Naoko KIHARA, Yoshiaki KAWAMONZEN, Takeshi OKINO, Ryosuke YAMAMOTO, Tomoyuki MAEDA, Norikatsu SASAO, Akiko YUZAWA, Takuya SHIMADA, Hiroyuki Hieda
  • Publication number: 20120251927
    Abstract: A hologram-recording medium containing: a recording layer containing a polymerizable monomer containing a structural framework represented by the following general formula (1). In general formula (1), X and Y are not the same, and X and Y are selected from hydrogen, iodine, bromine, and chlorine atoms and from methyl, ethyl, isopropyl, tert-butyl, phenyl, naphthyl, hydroxyl, methoxy, ethoxy, isopropoxy, tert-butoxy, phenoxy, naphthoxy, acetyl, carboxyl, acetoxy, thiophenyl, thionaphthyl, thiomethyl, thioethyl, thioisopropyl, thio-tert-butyl, and thiol groups; and W is selected from the group consisting of benzylvinyl, styryl, acryloyl, and methacryloyl groups.
    Type: Application
    Filed: June 15, 2012
    Publication date: October 4, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Norikatsu Sasao, Kazuki Matsumoto, Rumiko Hayase, Yoshiaki Kawamonzen, Masahiro Kanamaru, Masaya Terai
  • Publication number: 20110228663
    Abstract: A holographic recording method includes the following steps: irradiating an optical recording medium with a coherent reference beam and a coherent information beam to produce a hologram in the optical recording medium while irradiating the optical recording medium with an incoherent pretreatment beam to consume a polymerization inhibitor; irradiating the hologram with the reference beam to extract a reproduction beam while stopping irradiating the optical recording medium with the reference beam; sensing the signal beam with an image pick-up unit to detect an intensity of the signal beam; and calculating a bit error rate with a control unit to irradiate the hologram with the information beam if the bit error rate is larger than a prescribed value, or to stop irradiating the optical recording medium with the reference beam, the information beam and the pretreatment beam if the bit error rate is smaller than the prescribed value.
    Type: Application
    Filed: September 13, 2010
    Publication date: September 22, 2011
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Masaya Terai, Kazuki Matsumoto, Rumiko Hayase, Yoshiaki Kawamonzen, Norikatsu Sasao, Masahiro Kanamaru
  • Patent number: 7852537
    Abstract: An optical recording medium includes a first substrate having a groove on the side of an outer peripheral portion thereof; a second substrate in contact with the first substrate in the outer peripheral portion; and a recording layer being disposed in a gap between the first substrate and the second substrate and forming a void in cooperation with the first substrate at the portion of the groove.
    Type: Grant
    Filed: September 13, 2007
    Date of Patent: December 14, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akiko Hirao, Kazuki Matsumoto, Rumiko Hayase, Norikatsu Sasao, Takahiro Kamikawa
  • Publication number: 20100246371
    Abstract: According to a first aspect of the invention, an optical information recording apparatus includes a spatial beam modulator, an optical component, a drive unit, and a control unit. The apparatus performs angle-multiplex recording of the information so that an absolute value of a bisector angle ?x for n-th recording (1?n?rN) is smaller than an absolute value of a bisector angle ?x for m-th recording (m>n and rN<m?N). Here, N is the number of pages to be defined as the total number of recording times performed on a recording spot of an optical information recording medium. The n-th recording is performed on the recording spot with the reference beam and the information beam. r is a rate to be determined by a volumetric shrinkage of the optical information recording medium. The volumetric shrinkage increases with irradiating the optical information recording medium with the reference beam and the information beam.
    Type: Application
    Filed: March 8, 2010
    Publication date: September 30, 2010
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Masahiro Kanamaru, Kazuki Matsumoto, Rumiko Hayase, Yoshiaki Kawamonzen, Norikatsu Sasao, Masaya Terai
  • Publication number: 20100221646
    Abstract: A holographic recording medium includes a recording layer. The recording layer includes a framework being expressed with the following general formula (1), In the above formula (1), Ar represents a substituted or unsubstituted group selected from benzothiophene group, naphthothiophene group, dibenzothiophene group, thienothiophene group, dithienobenzene group, benzothiazole group, naphthothiazole group, benzoisothiazole group, naphthoisothiazole group, phenothiazine group, phenoxathiin group, dithianaphthalene group, thianthrene group, thioxanthene group, and bithiophene group. In addition, n is an integer from 1 to 4.
    Type: Application
    Filed: January 29, 2010
    Publication date: September 2, 2010
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshiaki KAWAMONZEN, Kazuki Matsumoto, Rumiko Hayase, Norikatsu Sasao, Masahiro Kanamaru, Masaya Terai
  • Publication number: 20100074074
    Abstract: An optical information recording apparatus includes a first optical system that radiates an information beam that carries information onto a recording medium; a second optical system that radiates reference beams onto the recording medium; a radiation position specifying unit that specifies a plurality of recording spots positioned within a radiation range of the reference beams; and an incident angle obtaining unit that specifies an incident angle of the reference beams that is used for recording an i'th interference fringe into a second recording spot adjacent to a first recording spot, as a value obtained by adding a product of 1/(1+m) and an absolute value of a difference between an incident angle of a first reference beam used for recording an i'th interference fringe into the first recording spot and an incident angle of a second reference beam used for recording an (i+1)'th interference fringe into the first recording spot.
    Type: Application
    Filed: August 26, 2009
    Publication date: March 25, 2010
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Masahiro Kanamaru, Kazuki Matsumoto, Rumiko Hayase, Satoshi Mikoshiba, Norikatsu Sasao, Takahiro Kamikawa, Masaya Terai
  • Publication number: 20100020372
    Abstract: A holographic recording medium is provided. The medium includes a recording layer. The recording layer includes a polymer matrix, a polymerizable monomer and a photopolymerization initiator. The polymerizable monomer includes a monomer being expressed in the following general formula (M1), (M2), or (M3). In the above general formulas, “A” and “B” denote a polymerizable substituent group and a nonpolymerizable substituent group, respectively.
    Type: Application
    Filed: July 23, 2009
    Publication date: January 28, 2010
    Inventors: Satoshi MIKOSHIBA, Kazuki MATSUMOTO, Rumiko HAYASE, Norikatsu SASAO, Takahiro KAMIKAWA, Masahiro KANAMARU, Masaya TERAI
  • Patent number: 7601465
    Abstract: A holographic recording medium has a recording layer including a radical-polymerizable compound, a first photo-radical polymerization initiator (A) containing a titanocene compound, and a second photo-radical polymerization initiator (B) containing at least one compound selected from the group consisting of an amino acetophenone derivative, an acylphosphine oxide derivative, a benzyl derivative, and a thioxanthone derivative.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: October 13, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Rumiko Hayase, Akiko Hirao, Kazuki Matsumoto, Norikatsu Sasao
  • Publication number: 20090231979
    Abstract: An optical recording medium is provided, which includes a recording layer includes a polymer matrix, a polymerizable compound, a photopolymerization initiator, and a polymerization inhibitor. The polymerization inhibitor is formed of a compound which exhibits a molar absorption coefficient of zero to a light having a first wavelength and generates an acid or a base when exposed to an external stimulus other than the light having the first wavelength, thereby inhibiting the polymerization of the polymerizable compound.
    Type: Application
    Filed: February 11, 2009
    Publication date: September 17, 2009
    Inventors: Rumiko HAYASE, Kazuki Matsumoto, Satoshi Mikoshiba, Norikatsu Sasao, Takahiro Kamikawa, Masahiro Kanamaru, Masaya Terai
  • Publication number: 20090226822
    Abstract: A holographic recording medium is provided, which includes a recording layer including a radically polymerizable monomer having an ethylenically unsaturated bond, a photo-acid generator, a photo-radical polymerization initiator, and a polymeric matrix. The polymeric matrix includes a repeating unit expressed by any one of the following chemical formulae.
    Type: Application
    Filed: February 11, 2009
    Publication date: September 10, 2009
    Inventors: Norikatsu SASAO, Akiko Hirao, Rumiko Hayase, Satoshi Mikoshiba, Kazuki Matsumoto, Takahiro Kamikawa, Masahiro Kanamaru
  • Publication number: 20090195847
    Abstract: A holographic recording medium is provided, which includes a recording layer containing a three-dimensional crosslinked polymer matrix, a photo-radical generating agent, and a ring-opening polymerizable compound having a radically ring-opening polymerizable alicyclic structure.
    Type: Application
    Filed: March 13, 2009
    Publication date: August 6, 2009
    Inventors: Satoshi MIKOSHIBA, Kazuki Matsumoto, Rumiko Hayase, Norikatsu Sasao, Takahiro Kamikawa, Masahiro Kanamaru
  • Publication number: 20090080314
    Abstract: An optical recording/reproducing apparatus includes an optical recording medium in which a holograms are recorded depending on an incident angle of a reference beam. The reference beam is irradiated to holograms while changing the incident angle to generate a reproduction light beam, and an image patterns are detected by an image pattern detector. The continuously output reproduction image patterns are temporarily stored in an image recorder, and the maximum value of reproduction light intensity is detected to generate a trigger signal. Depending on the trigger signal, an optimal image pattern is extracted from continuous reproduction image patterns, and thus, two-dimensional data is decoded.
    Type: Application
    Filed: September 16, 2008
    Publication date: March 26, 2009
    Inventors: KAZUKI MATSUMOTO, Akiko Hirao, Rumiko Hayase, Satoshi Mikoshiba, Norikatsu Sasao, Takahiro Kamikawa, Masahiro Kanamaru
  • Publication number: 20090053616
    Abstract: A holographic recording medium is provided, which includes a recording layer. The recording layer comprises a radical polymeric monomer having an aromatic ring-containing group and a polymeric group, a polymer matrix having the aromatic ring-containing group, and a photo-radical polymerization initiator.
    Type: Application
    Filed: March 18, 2008
    Publication date: February 26, 2009
    Inventors: SATOSHI MIKOSHIBA, Akiko Hirao, Rumiko Hayase, Kazuki Matsumoto, Norikatsu Sasao, Takahiro Kamikawa, Masahiro Kanamaru
  • Publication number: 20080254262
    Abstract: An optical recording medium includes a first substrate having a groove on the side of an outer peripheral portion thereof; a second substrate in contact with the first substrate in the outer peripheral portion; and a recording layer being disposed in a gap between the first substrate and the second substrate and forming a void in cooperation with the first substrate at the portion of the groove.
    Type: Application
    Filed: September 13, 2007
    Publication date: October 16, 2008
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiko Hirao, Kazuki Matsumoto, Rumiko Hayase, Norikatsu Sasao, Takahiro Kamikawa
  • Publication number: 20080145766
    Abstract: A holographic recording medium is provided, which includes a recording layer comprising a three-dimensional cross-linking polymer matrix, a radical polymeric compound, and a photo-radical polymerization initiator. The three-dimensional cross-linking polymer matrix is represented by the following general formula (1): where m is an integer ranging from 3 to 16.
    Type: Application
    Filed: June 29, 2007
    Publication date: June 19, 2008
    Inventors: Satoshi Mikoshiba, Akiko Hirao, Rumiko Hayase, Kazuki Matsumoto, Norikatsu Sasao, Takahiro Kamikawa