Patents by Inventor Kazuya Sakai

Kazuya Sakai 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).

  • Publication number: 20240010568
    Abstract: The present invention provides a zirconia pre-sintered body having excellent machinability and having a low probability of pillar fracture or chipping during milling. A method of production of such a zirconia pre-sintered body is also provided. The present invention relates to a zirconia pre-sintered body comprising zirconia, and a stabilizer capable of reducing a phase transformation of zirconia, the content of the stabilizer being 3 to 8 mol % relative to the total mole of the zirconia and the stabilizer, at least a part of the stabilizer being not dissolved in zirconia as a solid solution, and the zirconia pre-sintered body having a Vickers hardness of 65 to 135 HV 5/30 as measured in compliance with JIS Z 2244:2009.
    Type: Application
    Filed: September 28, 2021
    Publication date: January 11, 2024
    Applicant: Kuraray Noritake Dental Inc.
    Inventors: Kirihiro NAKANO, Kazuya SAKAI, Nobusuke KASHIKI, Sho ITO, Atsushi MATSUMOTO, Yoshihisa ITO
  • Patent number: 11308813
    Abstract: There is provided a flight management system for managing a flight plan of flying objects that fly among ports.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: April 19, 2022
    Assignees: The University of Tokyo, BLUE INNOVATION Co., Ltd.
    Inventors: Christopher Thomas Raabe, Shinji Suzuki, Takeshi Tsuchiya, Masayuki Kumada, Kazuya Sakai, Takashi Matsuo, Tsuyoshi Chiba
  • Patent number: 10942442
    Abstract: A mask blank is provided in which a phase-shift film is provided on a transparent substrate, the phase-shift film having a predetermined transmittance to ArF exposure light and being configured to shift a phase of ArF exposure light transmitted therethrough, wherein the phase-shift film comprises a nitrogen-containing layer that is formed from a material containing silicon and nitrogen and does not contain a transition metal, and wherein a content of oxygen in the nitrogen-containing layer, when measured by X-ray photoemission spectroscopy, is below a detection limit.
    Type: Grant
    Filed: October 31, 2019
    Date of Patent: March 9, 2021
    Assignee: HOYA CORPORATION
    Inventors: Osamu Nozawa, Hiroaki Shishido, Kazuya Sakai
  • Publication number: 20210016242
    Abstract: An object of the present invention is to provide a flow type reaction device which is capable of maintaining reaction efficiency and productivity which are sufficient for practical use for a long time, and reducing the size and cost of the reaction device, and the present invention provides a flow type reaction device (1) for continuously reacting two or more kinds of raw materials, including a mixing section (10) which is configured to mix two or more kinds of the raw materials, and a reaction section (20) which is provided on a secondary side with respect to the mixing section (10), and configured to obtain a product by reacting two or more kinds of the raw materials, the mixing section (10) includes a mixing device (13) which is configured to mix two or more kinds of the raw materials, and two or more supply pipes (L11, L12) which are configured to supply each of two or more kinds of the raw materials to the mixing device (13), the supply pipes (L11, L12) are respectively connected to the mixing device (13
    Type: Application
    Filed: November 9, 2018
    Publication date: January 21, 2021
    Inventors: Kazuya SAKAI, Shinya TOKUOKA
  • Publication number: 20210005091
    Abstract: There is provided a flight management system for managing a flight plan of flying objects that fly among ports.
    Type: Application
    Filed: February 27, 2018
    Publication date: January 7, 2021
    Inventors: Christopher Thomas RAABE, Shinji SUZUKI, Takeshi TSUCHIYA, Masayuki KUMADA, Kazuya SAKAI, Takashi MATSUO, Tsuyoshi CHIBA
  • Publication number: 20200064727
    Abstract: A mask blank is provided in which a phase-shift film is provided on a transparent substrate, the phase-shift film having a predetermined transmittance to ArF exposure light and being configured to shift a phase of ArF exposure light transmitted therethrough, wherein the phase-shift film comprises a nitrogen-containing layer that is formed from a material containing silicon and nitrogen and does not contain a transition metal, and wherein a content of oxygen in the nitrogen-containing layer, when measured by X-ray photoemission spectroscopy, is below a detection limit.
    Type: Application
    Filed: October 31, 2019
    Publication date: February 27, 2020
    Applicant: HOYA CORPORATION
    Inventors: Osamu NOZAWA, Hiroaki SHISHIDO, Kazuya SAKAI
  • Patent number: 10539866
    Abstract: Provided is a mask blank in which uniformity of the composition and optical characteristics of a phase-shift film in the in-plane direction and direction of film thickness is high, uniformity of the composition and optical characteristics of the phase-shift film between a plurality of substrates is also high, and defectivity is low even if a silicon-based material is applied to the material that forms the phase-shift film.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: January 21, 2020
    Assignee: HOYA CORPORATION
    Inventors: Osamu Nozawa, Hiroaki Shishido, Kazuya Sakai
  • Patent number: 10495966
    Abstract: Provided is a mask blank in which uniformity of the composition and optical characteristics of a phase-shift film in the in-plane direction and direction of film thickness is high, uniformity of the composition and optical characteristics of the phase-shift film between a plurality of substrates is also high, and defectivity is low even if a silicon-based material is applied to the material that forms the phase-shift film.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: December 3, 2019
    Assignee: HOYA CORPORATION
    Inventors: Osamu Nozawa, Hiroaki Shishido, Kazuya Sakai
  • Publication number: 20190146327
    Abstract: Provided is a mask blank in which uniformity of the composition and optical characteristics of a phase-shift film in the in-plane direction and direction of film thickness is high, uniformity of the composition and optical characteristics of the phase-shift film between a plurality of substrates is also high, and defectivity is low even if a silicon-based material is applied to the material that forms the phase-shift film.
    Type: Application
    Filed: November 27, 2018
    Publication date: May 16, 2019
    Applicant: HOYA CORPORATION
    Inventors: Osamu NOZAWA, Hiroaki SHISHIDO, Kazuya SAKAI
  • Patent number: 10234349
    Abstract: Provided is a sensor system capable of more accurately detecting abnormality. A sensor IC includes a first detector, a second detector, and a communication circuit. The first detector and the second detector output a first digital value and a second digital value according to the strength of a magnetic flux applied thereto, respectively. The communication circuit transmits the first and second digital values received from the first and second detectors to a control device. At this time, the communication circuitplaces the first and second digital values in a plurality of frames to transmit the plurality of frames. The communication circuit forms the plurality of frames such that bit information data of the first and second digital values placed in the frames is arranged in different orders between the first and second digital values.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: March 19, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Hiroshi Kichise, Yoshitomo Tokumoto, Kazuya Sakai, Yutaro Ishimoto, Kaname Aoki
  • Patent number: 10180622
    Abstract: Provided is a mask blank in which uniformity of the composition and optical characteristics of a phase-shift film in the in-plane direction and direction of film thickness is high, uniformity of the composition and optical characteristics of the phase-shift film between a plurality of substrates is also high, and defectivity is low even if a silicon-based material is applied to the material that forms the phase-shift film.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: January 15, 2019
    Assignee: HOYA CORPORATION
    Inventors: Hiroaki Shishido, Kazuya Sakai
  • Publication number: 20170176848
    Abstract: Provided is a mask blank in which uniformity of the composition and optical characteristics of a phase-shift film in the in-plane direction and direction of film thickness is high, uniformity of the composition and optical characteristics of the phase-shift film between a plurality of substrates is also high, and defectivity is low even if a silicon-based material is applied to the material that forms the phase-shift film.
    Type: Application
    Filed: March 9, 2017
    Publication date: June 22, 2017
    Applicant: HOYA CORPORATION
    Inventors: Hiroaki SHISHIDO, Kazuya SAKAI
  • Patent number: 9625805
    Abstract: The present invention is a reflective mask blank used to fabricate a reflective mask, which has a laminated structure of a multilayer reflective film, an absorber film and an etching mask film in this order on a substrate, wherein the etching mask film comprises a material containing chromium, the absorber film comprises a material containing tantalum, a highly oxidized layer is formed on the surface layer of the absorber film on the opposite side from the substrate, and a Ta 4f narrow spectrum of the highly oxidized layer when analyzed by X-ray photoelectron spectroscopy has a maximum peak at a binding energy of more than 23 eV.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: April 18, 2017
    Assignee: HOYA CORPORATION
    Inventors: Kazuya Sakai, Ryo Ohkubo, Osamu Nozawa, Toshiyuki Suzuki
  • Patent number: 9625806
    Abstract: Provided is a mask blank in which uniformity of the composition and optical characteristics of a phase-shift film in the in-plane direction and direction of film thickness is high, uniformity of the composition and optical characteristics of the phase-shift film between a plurality of substrates is also high, and defectivity is low even if a silicon-based material is applied to the material that forms the phase-shift film.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: April 18, 2017
    Assignee: HOYA CORPORATION
    Inventors: Osamu Nozawa, Hiroaki Shishido, Kazuya Sakai
  • Patent number: 9535320
    Abstract: Provided is a method of manufacturing a mask blank that is improved in cleaning resistance to ozone cleaning or the like, thus capable of preventing degradation of the mask performance due to the cleaning. The method is for manufacturing a mask blank having, on a substrate, a thin film which is formed at its surface with an antireflection layer made of a material containing a transition metal, and carries out a treatment of causing a highly concentrated ozone gas with a concentration of 50 to 100 vol % to act on the antireflection layer to thereby form a surface modified layer comprising a strong oxide film containing an oxide of the transition metal at a surface of the antireflection layer.
    Type: Grant
    Filed: June 18, 2015
    Date of Patent: January 3, 2017
    Assignee: HOYA CORPORATION
    Inventors: Kazuya Sakai, Masahiro Hashimoto
  • Patent number: 9436079
    Abstract: Provided are a phase shift mask blank that is improved in the irradiation durability of a light-semitransmissive film (phase shift film), made of a material containing mainly a transition metal, silicon, and nitrogen, to exposure light having a wavelength of 200 nm or less and thus can improve the mask lifetime, a method of manufacturing such a phase shift mask blank, and a phase shift mask. The phase shift mask blank is used for manufacturing a phase shift mask adapted to be applied with ArF excimer laser exposure light. The phase shift mask blank has a light-semitransmissive film on a transparent substrate. The light-semitransmissive film is an incomplete nitride film containing mainly a transition metal, silicon, and nitrogen. The content ratio of the transition metal to the transition metal and the silicon in the light-semitransmissive film is less than 9%.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: September 6, 2016
    Assignee: HOYA CORPORATION
    Inventors: Osamu Nozawa, Hiroaki Shishido, Kazuya Sakai
  • Publication number: 20160123823
    Abstract: Provided is a sensor system capable of more accurately detecting abnormality. A sensor IC includes a first detector, a second detector, and a communication circuit. The first detector and the second detector output a first digital value and a second digital value according to the strength of a magnetic flux applied thereto, respectively. The communication circuit transmits the first and second digital values received from the first and second detectors to a control device. At this time, the communication circuit places the first and second digital values in a plurality of frames to transmit the plurality of frames. The communication circuit forms the plurality of frames such that bit information data of the first and second digital values placed in the frames is arranged in different orders between the first and second digital values.
    Type: Application
    Filed: October 22, 2015
    Publication date: May 5, 2016
    Inventors: Hiroshi KICHISE, Yoshitomo TOKUMOTO, Kazuya SAKAI, Yutaro ISHIMOTO, Kaname AOKI
  • Publication number: 20150338731
    Abstract: Provided is a mask blank in which uniformity of the composition and optical characteristics of a phase-shift film in the in-plane direction and direction of film thickness is high, uniformity of the composition and optical characteristics of the phase-shift film between a plurality of substrates is also high, and defectivity is low even if a silicon-based material is applied to the material that forms the phase-shift film.
    Type: Application
    Filed: January 14, 2014
    Publication date: November 26, 2015
    Applicant: HOYA CORPORATION
    Inventors: Osamu NOZAWA, Hiroaki SHISHIDO, Kazuya SAKAI
  • Publication number: 20150286132
    Abstract: Provided is a method of manufacturing a mask blank that is improved in cleaning resistance to ozone cleaning or the like, thus capable of preventing degradation of the mask performance due to the cleaning. The method is for manufacturing a mask blank having, on a substrate, a thin film which is formed at its surface with an antireflection layer made of a material containing a transition metal, and carries out a treatment of causing a highly concentrated ozone gas with a concentration of 50 to 100 vol % to act on the antireflection layer to thereby form a surface modified layer comprising a strong oxide film containing an oxide of the transition metal at a surface of the antireflection layer.
    Type: Application
    Filed: June 18, 2015
    Publication date: October 8, 2015
    Applicant: HOYA CORPORATION
    Inventors: Kazuya SAKAI, Masahiro HASHIMOTO
  • Publication number: 20150261083
    Abstract: The present invention is a reflective mask blank used to fabricate a reflective mask, which has a laminated structure of a multilayer reflective film, an absorber film and an etching mask film in this order on a substrate, wherein the etching mask film comprises a material containing chromium, the absorber film comprises a material containing tantalum, a highly oxidized layer is formed on the surface layer of the absorber film on the opposite side from the substrate, and a Ta 4f narrow spectrum of the highly oxidized layer when analyzed by X-ray photoelectron spectroscopy has a maximum peak at a binding energy of more than 23 eV.
    Type: Application
    Filed: June 3, 2015
    Publication date: September 17, 2015
    Applicant: HOYA CORPORATION
    Inventors: Kazuya SAKAI, Ryo OHKUBO, Osamu NOZAWA, Toshiyuki SUZUKI