Patents by Inventor Kengo Asai

Kengo Asai 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: 20250115701
    Abstract: A silicone-containing polymer material containing an internal wetting agent and being excellent in transparency, the silicone-containing polymer material being improved in antifouling property against lipids. The polymer material of the present invention is a polymer material, which is obtained by polymerizing a polymerizable mixture containing monomer components (a) and a hydrophilic polymer component (b), wherein the monomer components (a) include a silicone-containing monomer (a-1) having a siloxane bond and being free of any hydroxyl group, and a compatibilizing monomer (a-2) having a hydrogen bonding proton-containing group and being free of any silicon atom, and wherein the compatibilizing monomer has four or more carbon atoms, excluding carbon atoms contained in a polymerizable functional group, and has a solubility of less than 0.03 g/mL in water at 25° C.
    Type: Application
    Filed: December 17, 2024
    Publication date: April 10, 2025
    Applicant: Menicon Co., Ltd.
    Inventors: Kohsuke SATAKE, Kengo Asai, Kazuhiro Sunahara, Yurika Satake
  • Patent number: 12209154
    Abstract: A silicone-containing polymer material containing an internal wetting agent and being excellent in transparency, the silicone-containing polymer material being improved in antifouling property against lipids. The polymer material of the present invention is a polymer material, which is obtained by polymerizing a polymerizable mixture containing monomer components (a) and a hydrophilic polymer component (b), wherein the monomer components (a) include a silicone-containing monomer (a-1) having a siloxane bond and being free of any hydroxyl group, and a compatibilizing monomer (a-2) having a hydrogen bonding proton-containing group and being free of any silicon atom, and wherein the compatibilizing monomer has four or more carbon atoms, excluding carbon atoms contained in a polymerizable functional group, and has a solubility of less than 0.03 g/mL in water at 25° C.
    Type: Grant
    Filed: February 21, 2020
    Date of Patent: January 28, 2025
    Assignee: MENICON CO., LTD.
    Inventors: Kohsuke Satake, Kengo Asai, Kazuhiro Sunahara, Yurika Satake
  • Patent number: 12051560
    Abstract: Provided is an ion gun that is capable of obtaining a higher plasma efficiency. This ion gun comprises: a first cathode 21 that is formed in a disc shape; a second cathode 12 that is formed in a disc shape and has an ion beam extraction hole 101a provided thereto; a first permanent magnet 14 that is disposed between the first cathode and the second cathode, and that is formed in a cylindrical shape; an anode 23 that has a cylindrical region 35a and an extending region 25a provided to one end of the cylindrical region; and an insulating material 26 that keeps the anode electrically insulated from the first cathode, the second cathode, and the first permanent magnet, all of which are electrically connected. The cylindrical region of the anode is disposed inside the inner diametrical position of the first permanent magnet, and the extending region of the anode is disposed so as to cross over the inner diametrical position of the first permanent magnet and to face the first cathode.
    Type: Grant
    Filed: August 28, 2019
    Date of Patent: July 30, 2024
    Assignee: HITACHI HIGH-TECH CORPORATION
    Inventors: Kengo Asai, Hisayuki Takasu, Toru Iwaya, Tsutomu Tetsuka
  • Patent number: 12020893
    Abstract: An ion milling device which balances high processing speed and a wide processing region with smoothness of a processing surface. The ion milling device includes first to third ion guns that emit unfocused ion beams. An ion beam center of the third ion gun is included in a first plane defined by a normal to a surface of a sample and a mask end, and an ion beam center of the first ion gun and an ion beam center of the second ion gun are included in a second plane. The second plane is inclined toward the mask with respect to the first plane, and an angle formed by the first plane and the second plane is more than 0 degrees and 10 degrees or less. The processing surface of the sample is formed in a region where the emitted ion beams overlap on the surface of the sample.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: June 25, 2024
    Assignee: HITACHI HIGH-TECH CORPORATION
    Inventors: Kengo Asai, Hisayuki Takasu, Toru Iwaya
  • Publication number: 20240194443
    Abstract: Provided is an ion milling device that can dramatically improve processing speed controllability and processing profile reproducibility. The ion milling device includes: an ion gun attached to a vacuum chamber and configured to emit an unfocused ion beam; a sample stand disposed in the vacuum chamber and configured to hold a sample; an ion beam characteristic measurement mechanism configured to measure an ion beam characteristic for estimating a processing profile of the sample processed by the ion beam; and a control unit. A magnetic field generation device is configured to generate a magnetic field in an ionization chamber of the ion gun and includes an electromagnet including an electromagnetic coil and a magnetic path. The control unit controls a value of a current, which is applied to the electromagnetic coil, based on the ion beam characteristic measured by the ion beam characteristic measurement mechanism.
    Type: Application
    Filed: May 19, 2021
    Publication date: June 13, 2024
    Inventors: Kengo ASAI, Hisayuki TAKASU, Shota AIDA
  • Publication number: 20230352263
    Abstract: An ion milling device which balances high processing speed and a wide processing region with smoothness of a processing surface. The ion milling device includes first to third ion guns that emit unfocused ion beams. An ion beam center of the third ion gun is included in a first plane defined by a normal to a surface of a sample and a mask end, and an ion beam center of the first ion gun and an ion beam center of the second ion gun are included in a second plane. The second plane is inclined toward the mask with respect to the first plane, and an angle formed by the first plane and the second plane is more than 0 degrees and 10 degrees or less. The processing surface of the sample is formed in a region where the emitted ion beams overlap on the surface of the sample.
    Type: Application
    Filed: January 29, 2020
    Publication date: November 2, 2023
    Inventors: Kengo ASAI, Hisayuki TAKASU, Toru IWAYA
  • Publication number: 20220285123
    Abstract: Provided is an ion gun that is capable of obtaining a higher plasma efficiency. This ion gun comprises: a first cathode 21 that is formed in a disc shape; a second cathode 12 that is formed in a disc shape and has an ion beam extraction hole 101a provided thereto; a first permanent magnet 14 that is disposed between the first cathode and the second cathode, and that is formed in a cylindrical shape; an anode 23 that has a cylindrical region 35a and an extending region 25a provided to one end of the cylindrical region; and an insulating material 26 that keeps the anode electrically insulated from the first cathode, the second cathode, and the first permanent magnet, all of which are electrically connected. The cylindrical region of the anode is disposed inside the inner diametrical position of the first permanent magnet, and the extending region of the anode is disposed so as to cross over the inner diametrical position of the first permanent magnet and to face the first cathode.
    Type: Application
    Filed: August 28, 2019
    Publication date: September 8, 2022
    Inventors: Kengo Asai, Hisayuki Takasu, Toru Iwaya, Tsutomu Tetsuka
  • Patent number: 11257654
    Abstract: To provide an ion milling apparatus adapted to suppress the contamination of a beam forming electrode. The ion milling apparatus includes: an ion gun containing therein a beam forming electrode for forming an ion beam; a specimen holder for fixing a specimen to be processed by irradiation of an ion beam; a mask for shielding a part of the specimen from the ion beam; and an ion gun controller for controlling the ion gun.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: February 22, 2022
    Assignee: HITACHI HIGH-TECH CORPORATION
    Inventors: Kengo Asai, Hiroyasu Shichi, Toru Iwaya, Hisayuki Takasu
  • Patent number: 11158481
    Abstract: To provide an ion gun of a penning discharge type capable of achieving a milling rate which is remarkably higher than that in the related art, an ion milling device including the same, and an ion milling method. An ion generation unit includes a cathode that emits electrons, an anode that is provided within the ion generation unit and has an inner diameter of 5.2 mm or less, and magnetic-field generation means using a permanent magnet of which a maximum energy product ranges from 110 kJ/m3 to 191 kJ/m3.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: October 26, 2021
    Assignee: HITACHI HIGH-TECH CORPORATION
    Inventors: Kengo Asai, Hiroyasu Shichi, Hisayuki Takasu, Toru Iwaya
  • Publication number: 20210287871
    Abstract: To provide an ion milling apparatus adapted to suppress the contamination of a beam forming electrode. The ion milling apparatus includes: an ion gun containing therein a beam forming electrode for forming an ion beam; a specimen holder for fixing a specimen to be processed by irradiation of an ion beam; a mask for shielding a part of the specimen from the ion beam; and an ion gun controller for controlling the ion gun.
    Type: Application
    Filed: July 14, 2016
    Publication date: September 16, 2021
    Applicant: HITACHI HIGH-TECHNOLOGIES CORPORATION
    Inventors: Kengo ASAI, Hiroyasu SHICHI, Toru IWAYA, Hisayuki TAKASU
  • Publication number: 20210163650
    Abstract: A silicone-containing polymer material containing an internal wetting agent and being excellent in transparency, the silicone-containing polymer material being improved in antifouling property against lipids. The polymer material of the present invention is a polymer material, which is obtained by polymerizing a polymerizable mixture containing monomer components (a) and a hydrophilic polymer component (b), wherein the monomer components (a) include a silicone-containing monomer (a-1) having a siloxane bond and being free of any hydroxyl group, and a compatibilizing monomer (a-2) having a hydrogen bonding proton-containing group and being free of any silicon atom, and wherein the compatibilizing monomer has four or more carbon atoms, excluding carbon atoms contained in a polymerizable functional group, and has a solubility of less than 0.03 g/mL in water at 25° C.
    Type: Application
    Filed: February 21, 2020
    Publication date: June 3, 2021
    Applicant: MENICON CO., LTD.
    Inventors: Kohsuke SATAKE, Kengo ASAI, Kazuhiro SUNAHARA, Yurika SATAKE
  • Publication number: 20190237291
    Abstract: To provide an ion gun of a penning discharge type capable of achieving a milling rate which is remarkably higher than that in the related art, an ion milling device including the same, and an ion milling method. An ion generation unit includes a cathode that emits electrons, an anode that is provided within the ion generation unit and has an inner diameter of 5.2 mm or less, and magnetic-field generation means using a permanent magnet of which a maximum energy product ranges from 110 kJ/m3 to 191 kJ/m3.
    Type: Application
    Filed: April 11, 2019
    Publication date: August 1, 2019
    Inventors: Kengo ASAI, Hiroyasu SHICHI, Hisayuki TAKASU, Toru IWAYA
  • Patent number: 10361065
    Abstract: To provide an ion milling system that can suppress an orbital shift of an observation electron beam emitted from an electron microscope column, the ion milling system includes: a Penning discharge type ion gun 100 that includes a permanent magnet 114 and that generates ions for processing a sample; and a scanning electron microscope for observing the sample, in which a magnetic shield 172 for reducing a leakage magnetic field from the permanent magnet 114 to the electron microscope column is provided.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: July 23, 2019
    Assignee: HITACHI HIGH-TECHNOLOGIES CORPORATION
    Inventors: Kengo Asai, Toru Iwaya, Hisayuki Takasu, Hiroyasu Shichi
  • Patent number: 10332722
    Abstract: To provide an ion gun of a penning discharge type capable of narrowing a beam with a low ion beam current at a low acceleration voltage, an ion milling device including the same, and an ion milling method. An ion milling device that controls half width of a beam profile of an ion beam with which a sample is irradiated from an ion gun to be in a range of 200 ?m to 350 ?m. The device includes: the ion gun that ionizes a gas supplied from the outside, and emits an ion beam; a gas-flow-rate varying unit that varies a flow rate of the gas supplied to the ion gun; and a current measurement unit that measures a current value of the ion beam emitted from the ion gun. The gas-flow-rate varying unit sets a gas flow rate to be higher than a gas flow rate at which the ion beam current has a maximum value based on the current value measured by the current measurement unit and the flow rate of the gas determined by the gas-flow-rate varying unit.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: June 25, 2019
    Assignee: HITACHI HIGH-TECHNOLOGIES CORPORATION
    Inventors: Kengo Asai, Hiroyasu Shichi, Hisayuki Takasu, Toru Iwaya
  • Patent number: 10304653
    Abstract: To provide an ion gun of a penning discharge type capable of achieving a milling rate which is remarkably higher than that in the related art, an ion milling device including the same, and an ion milling method. An ion generation unit includes a cathode that emits electrons, an anode that is provided within the ion generation unit and has an inner diameter of 5.2 mm or less, and magnetic-field generation means using a permanent magnet of which a maximum energy product ranges from 110 kJ/m3 to 191 kJ/m3.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: May 28, 2019
    Assignee: HITACHI HIGH-TECHNOLOGIES CORPORATION
    Inventors: Kengo Asai, Hiroyasu Shichi, Hisayuki Takasu, Toru Iwaya
  • Publication number: 20180286633
    Abstract: To provide an ion milling system that can suppress an orbital shift of an observation electron beam emitted from an electron microscope column, the ion milling system includes: a Penning discharge type ion gun 100 that includes a permanent magnet 114 and that generates ions for processing a sample; and a scanning electron microscope for observing the sample, in which a magnetic shield 172 for reducing a leakage magnetic field from the permanent magnet 114 to the electron microscope column is provided.
    Type: Application
    Filed: September 25, 2015
    Publication date: October 4, 2018
    Applicant: HITACHI HIGH-TECHNOLOGIES CORPORATION
    Inventors: Kengo ASAI, Toru IWAYA, Hisayuki TAKASU, Hiroyasu SHICHI
  • Patent number: 9906205
    Abstract: A technique capable of maintaining the filter characteristics of a transmitting filter and a receiving filter by reducing the influences of heat from the power amplifier given to the transmitting filter and the receiving filter as small as possible in the case where the transmitting filter and the receiving filter are formed on the same semiconductor substrate together with the power amplifier in a mobile communication equipment typified by a mobile phone is provided. A high heat conductivity film HCF is provided on a passivation film PAS over the entire area of a semiconductor substrate 1S including an area AR1 on which an LDMOSFET is formed and an area AR2 on which a thin-film piezoelectric bulk wave resonator BAW is formed. The heat mainly generated in the LDMOSFET is efficiently dissipated in all directions by the high heat conductivity film HCF formed on the surface of the semiconductor substrate 1S.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: February 27, 2018
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Kengo Asai, Atsushi Isobe
  • Publication number: 20170221671
    Abstract: To provide an ion gun of a penning discharge type capable of achieving a milling rate which is remarkably higher than that in the related art, an ion milling device including the same, and an ion milling method. An ion generation unit includes a cathode that emits electrons, an anode that is provided within the ion generation unit and has an inner diameter of 5.2 mm or less, and magnetic-field generation means using a permanent magnet of which a maximum energy product ranges from 110 kJ/m3 to 191 kJ/m3.
    Type: Application
    Filed: July 29, 2015
    Publication date: August 3, 2017
    Inventors: Kengo ASAI, Hiroyasu SHICHI, Hisayuki TAKASU, Toru IWAYA
  • Publication number: 20170221677
    Abstract: To provide an ion gun of a penning discharge type capable of narrowing a beam with a low ion beam current at a low acceleration voltage, an ion milling device including the same, and an ion milling method. An ion milling device that controls half width of a beam profile of an ion beam with which a sample is irradiated from an ion gun to be in a range of 200 ?m to 350 ?m. The device includes: the ion gun that ionizes a gas supplied from the outside, and emits an ion beam; a gas-flow-rate varying unit that varies a flow rate of the gas supplied to the ion gun; and a current measurement unit that measures a current value of the ion beam emitted from the ion gun. The gas-flow-rate varying unit sets a gas flow rate to be higher than a gas flow rate at which the ion beam current has a maximum value based on the current value measured by the current measurement unit and the flow rate of the gas determined by the gas-flow-rate varying unit.
    Type: Application
    Filed: July 29, 2015
    Publication date: August 3, 2017
    Inventors: Kengo ASAI, Hiroyasu SHICHI, Hisayuki TAKASU, Toru IWAYA
  • Patent number: 9527986
    Abstract: Provide a cellulose acylate film with small photoelastic coefficient, low moisture content and low haze, and a polarizing plate and a liquid crystal display device using the same. Also provided is a cellulose acylate film including at least cellulose acylate and a resin produced by hydrogenating a polymer containing a repeating unit derived from a monomer represented by the formula (1) below and hydroxyl group: in the formula (1), R1 represents a hydrogen atom or C1-5 alkyl group; each R2 represents a hydrogen atom or substituent, at least one of (R2)s being a hydroxyl group-containing substituent; moiety (A) may form, or does not necessarily form, a five- or six-membered ring; n represents an integer of 1 to 5, and when n is 2 or larger, the plurality of (R2)s may be same with or different from each other.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: December 27, 2016
    Assignee: FUJIFILM CORPORATION
    Inventors: Akio Tamura, Kengo Asai