Patents by Inventor Hidekazu Yokoo

Hidekazu Yokoo 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: 20210296154
    Abstract: To provide an electrostatic chuck that stably supports a substrate while suppressing a rapid increase in the volume of a gas, a vacuum processing apparatus, and a substrate processing method. An electrostatic chuck according to an embodiment of the present invention includes: a chuck plate that has a first surface supporting a substrate and a second surface opposite to the first surface. The chuck plate includes an exhaust passage that exhausts a gas from between the substrate and the first surface, the gas being emitted from the substrate between the substrate and the first surface when the substrate is supported by the first surface.
    Type: Application
    Filed: August 8, 2019
    Publication date: September 23, 2021
    Inventors: Genji SAKATA, Hidekazu YOKOO
  • Publication number: 20160300938
    Abstract: One embodiment of the present invention includes preparing a first conductive semiconductor substrate manufactured using the MCZ method. A second conductive base layer (12), first conductive emitter regions (13), and gate electrodes (14) are formed on a first surface of the semiconductor substrate. The semiconductor substrate is thinned by machining the second surface of the semiconductor substrate and a second conductive collector layer (15) is formed by implanting boron into the thinned second surface. A first conductive buffer layer (16) having a higher impurities concentration than the semiconductor substrate is formed by implanting hydrogen into an area inside the semiconductor substrate and adjacent to the collector layer (15).
    Type: Application
    Filed: December 2, 2014
    Publication date: October 13, 2016
    Inventors: Kazuhiko Tonari, Akio Nakagawa, Hidekazu Yokoo, Hideo Suzuki
  • Publication number: 20140318608
    Abstract: A method of manufacturing a solar cell includes a first center alignment step S10 of setting a substrate center position as a reference position for processing of an impurity implanting step S20 and a second center alignment step S30 of setting a substrate center position as a reference position for processing of an electrode forming step S40.
    Type: Application
    Filed: October 11, 2012
    Publication date: October 30, 2014
    Inventors: Genji Sakata, Hidekazu Yokoo, Makoto Tomita, Hideo Suzuki
  • Patent number: 7847271
    Abstract: An ion implanter for manufacturing a single crystal film by extracting a hydrogen ion or a rare-gas ion from an ion source, selects a desired ion with a first sector electromagnet, scanning the ion with a scanner, collimates the ion with a second sector electromagnet, and implants it into a substrate; the ion source is configured to be located close to the entrance side focal point of the first sector electromagnet. In this case, when an aperture of an extraction section of the ion source is circular and entrance side focal points in a deflection surface and a surface perpendicular thereto in the first sector electromagnet are coincident, the ion beam after passing the first sector electromagnet becomes completely parallel in the two surfaces and the spot shape becomes a circle.
    Type: Grant
    Filed: February 15, 2007
    Date of Patent: December 7, 2010
    Assignee: Ulvac Inc.
    Inventors: Seiji Ogata, Ryota Fukui, Hidekazu Yokoo, Tsutomu Nishihashi
  • Patent number: 7777206
    Abstract: A control method of an ion implantation device that radiates an ion beam emitted from an ion source via an optical element onto a material to be treated, includes the steps of: measuring the spatial distribution of the ion beam in the vicinity of the material to be treated; estimating the emittance, which is the spatial and angular distribution of the ion beam of the ion source, from the measured spatial distribution, by using an ion beam trajectory calculation method; calculating the operating conditions of the optical element so that the ion beam in the vicinity of the material to be treated has a desired spatial distribution, by using the estimated emittance and the trajectory calculation method; and operating the ion implantation device by using the calculated operating conditions of the optical element.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: August 17, 2010
    Assignee: ULVAC, Inc.
    Inventors: Seiji Ogata, Hidekazu Yokoo, Masasumi Araki
  • Publication number: 20090189066
    Abstract: A control method of an ion implantation device that radiates an ion beam emitted from an ion source via an optical element onto a material to be treated, includes the steps of: measuring the spatial distribution of the ion beam in the vicinity of the material to be treated; estimating the emittance, which is the spatial and angular distribution of the ion beam of the ion source, from the measured spatial distribution, by using an ion beam trajectory calculation method; calculating the operating conditions of the optical element so that the ion beam in the vicinity of the material to be treated has a desired spatial distribution, by using the estimated emittance and the trajectory calculation method; and operating the ion implantation device by using the calculated operating conditions of the optical element.
    Type: Application
    Filed: February 23, 2006
    Publication date: July 30, 2009
    Applicant: ULVAC, INC.
    Inventors: Seiji Ogata, Hidekazu Yokoo, Masasumi Araki
  • Publication number: 20090072164
    Abstract: An ion implanter for manufacturing a single crystal film by extracting a hydrogen ion or a rare-gas ion from an ion source, selects a desired ion with a first sector electromagnet, scanning the ion with a scanner, collimates the ion with a second sector electromagnet, and implants it into a substrate; the ion source is configured to be located close to the entrance side focal point of the first sector electromagnet. In this case, when an aperture of an extraction section of the ion source is circular and entrance side focal points in a deflection surface and a surface perpendicular thereto in the first sector electromagnet are coincident, the ion beam after passing the first sector electromagnet becomes completely parallel in the two surfaces and the spot shape becomes a circle.
    Type: Application
    Filed: February 15, 2007
    Publication date: March 19, 2009
    Applicant: ULVAC INC.
    Inventors: Seiji Ogata, Ryota Fukui, Hidekazu Yokoo, Tsutomu Nishihashi