Patents by Inventor Hiroyuki Ohtsuka

Hiroyuki Ohtsuka 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: 20200243911
    Abstract: The invention provides an electrolyte solution capable of providing an electrochemical device having low resistance and excellent high-temperature storage characteristics and cycle characteristics. The electrolyte solution contains lithium fluorosulfonate and a solvent containing a compound (1) represented by the following formula (1):CF2HCOOCH3.
    Type: Application
    Filed: July 31, 2018
    Publication date: July 30, 2020
    Applicant: DAIKIN INDUSTRIES, LTD
    Inventors: Yoshiko KUWAJIMA, Kenzou TAKAHASHI, Shigeaki YAMAZAKI, Hiroyuki ARIMA, Tomoya HIDAKA, Masakazu KINOSHITA, Hisako NAKAMURA, Takaya YAMADA, Toshiharu SHIMOOKA, Yuuki SUZUKI, Tatsuya OHTSUKA
  • Publication number: 20200227584
    Abstract: The present invention provides a method for manufacturing a solar cell including: preparing a semiconductor silicon substrate which has an electrode, which is formed by baking an electrode precursor containing Ag powder on at least one main surface, has a PN junction, and is less than 100° C.; and performing an annealing treatment to the semiconductor silicon substrate at 100° C. or more and 450° C. or less.
    Type: Application
    Filed: March 25, 2020
    Publication date: July 16, 2020
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takenori WATABE, Hiroshi HASHIGAMI, Hiroyuki OHTSUKA
  • Patent number: 10700223
    Abstract: A solar battery cell including a finger electrode on a first main surface of a semiconductor substrate, the solar battery cell being including at least a surface of the finger electrode is covered with a material containing an insulating material so that the surface is not exposed, and the material containing the insulating material does not hydrolyze or does not generate a carboxylic acid when it hydrolyzes. Consequently, it is possible to provide a solar battery cell which suppresses a reduction in photoelectric conversion efficiency with time even though EVA is used and to provide a photovoltaic module using this solar battery cell.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: June 30, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takenori Watabe, Yoko Matsuo, Hiroshi Hashigami, Hiroyuki Ohtsuka
  • Patent number: 10692736
    Abstract: A method for producing a solar cell, which produces a single-crystal silicon solar cell by using a single-crystal silicon substrate, including: a high-temperature heat treatment process in which the single-crystal silicon substrate is subjected to heat treatment at 800° C. or higher and 1200° C. or lower, wherein the high-temperature heat treatment process includes a conveying step of loading the single-crystal silicon substrate into a heat treatment apparatus, a heating step of heating the single-crystal silicon substrate, a temperature keeping step of keeping the single-crystal silicon substrate at a predetermined temperature of 800° C. or higher and 1200° C. or lower, and a cooling step of cooling the single-crystal silicon substrate, and, in the high-temperature heat treatment process, the length of time during which the temperature of the single-crystal silicon substrate is 400° C. or higher and 650° C. or lower is set at 5 minutes or less throughout the conveying step and the heating step.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: June 23, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Hiroshi Hashigami, Takenori Watabe, Hiroyuki Ohtsuka
  • Publication number: 20200185547
    Abstract: An object of the present invention is to provide, at a low cost, a solar cell having high conversion efficiency. A solar cell according to the present invention is characterized by including a passivation film that protects a semiconductor substrate, a first finger electrode connected to the semiconductor substrate on a main surface of the semiconductor substrate, a first bus bar electrode that intersects the first finger electrode, and an intermediate layer provided in an intersecting position of the first finger electrode and the first bus bar electrode. The solar cell is characterized in that the first finger electrode and the first bus bar electrode are electrically connected to each other via the intermediate layer.
    Type: Application
    Filed: April 4, 2017
    Publication date: June 11, 2020
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Ryo MITTA, Takenori WATABE, Hiroyuki OHTSUKA
  • Publication number: 20200105963
    Abstract: A method for manufacturing a solar cell capable of enhancing photoelectric conversion efficiency is provided. The present invention is a method for manufacturing a solar cell which includes steps of forming a p-n junction on a silicon semiconductor substrate and forming an aluminum oxide film on at least one main surface of the silicon semiconductor substrate, including: a step of subjecting the silicon semiconductor substrate to heat treatment in an atmosphere with 20 g or more water vapor per cubic meter and a temperature of 60° C. or more and 100° C. or less before the step of forming the aluminum oxide film. Consequently, a method for manufacturing a solar cell capable of enhancing photoelectric conversion efficiency is provided.
    Type: Application
    Filed: April 20, 2018
    Publication date: April 2, 2020
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takenori WATABE, Hiroshi HASHIGAMI, Hiroyuki OHTSUKA
  • Publication number: 20200058810
    Abstract: A solar cell including a semiconductor substrate having a first conductivity type an emitter region, having a second conductivity type opposite to the first conductivity type, on a first main surface of the semiconductor substrate an emitter electrode which is in contact with the emitter region a base region having the first conductivity type a base electrode which is in contact with the base region and an insulator film for preventing an electrical short-circuit between the emitter region and the base region, wherein the insulator film is made of a polyimide, and the insulator film has a C6H11O2 detection count number of 100 or less when the insulator film is irradiated with Bi5++ ions with an acceleration voltage of 30 kV and an ion current of 0.2 pA by a TOF-SIMS method. There can be provided a solar cell having excellent weather resistance and high photoelectric conversion characteristics.
    Type: Application
    Filed: November 15, 2016
    Publication date: February 20, 2020
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Hiroshi HASHIGAMI, Shun MORIYAMA, TAKENORI WATABE, Hiroyuki OHTSUKA
  • Publication number: 20200052136
    Abstract: A solar cell having, on a semiconductor substrate's first main surface a first conductivity type, a base layer having first conductivity type and an emitter layer which is adjacent to base layer and has a second conductivity type which is a conductivity type opposite to first conductivity type, the solar cell includes: a base electrode which is electrically connected with base layer; and an emitter electrode which is electrically connected with emitter layer, solar cell including: dielectric films which are in contact with base and emitter layer on first main surface; first insulator films which cover the emitter electrode, are placed on the dielectric films, and are arranged to have a gap at least on base layer; and a base bus bar electrode placed at least on first insulator films, and being wherein gap distance between the first insulator films is 40 ?m or more and (W+110) ?m or less.
    Type: Application
    Filed: October 25, 2016
    Publication date: February 13, 2020
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takenori WATABE, Shun MORIYAMA, Hiroshi HASHIGAMI, Hiroyuki OHTSUKA
  • Patent number: 10544713
    Abstract: A control device is configured, if, although the control device has caused a cam switching device to perform a first cam switching operation for switching the profiles of all the valve-driving cams of a plurality of cylinders from a first profile to a second profile, the profiles of all the valve-driving cams of the plurality of cylinders do not coincide with the second profile, to cause the cam switching device to perform a second cam switching operation for switching the profile of the valve-driving cam for at least one or more normal cylinders that are one or more cylinders at which the switching of profiles to the second profile has succeeded.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: January 28, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shinji Sadakane, Hiroyuki Sugihara, Noriyasu Adachi, Keisuke Sasaki, Shigehiro Sugihira, Takayoshi Kawai, Kaoru Ohtsuka
  • Patent number: 10513950
    Abstract: Provided is a control device for an internal combustion engine equipped with a cam switching device including a cam groove provided on the outer peripheral surface of a camshaft and an electromagnetic solenoid type actuator capable of protruding, toward the camshaft, an engagement pin that is engageable with the cam groove. The control device is configured, in causing the cam switching device to perform a cam switching operation, to perform energization of the actuator such that the engagement pin is seated on a forward outer peripheral surface, and to more lower, when an electric current (coil current) flowing through the actuator as a result of the energization is greater, an average electric voltage per unit time applied to the actuator in protruding the engagement pin toward the cam groove from the forward outer peripheral surface.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: December 24, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Noriyasu Adachi, Keisuke Sasaki, Shigehiro Sugihira, Takayoshi Kawai, Shinji Sadakane, Hiroyuki Sugihara, Kaoru Ohtsuka
  • Publication number: 20190305149
    Abstract: A method for manufacturing a solar cell, including the steps of: forming unevenness on both of main surfaces of a semiconductor substrate of a first conductivity type; forming an emitter layer on a first main surface of the semiconductor substrate; forming a diffusion mask on the emitter layer; removing the diffusion mask in a pattern; forming a base layer on the portion where the diffusion mask have been removed; removing the remaining diffusion mask; forming a dielectric film on the first main surface; forming a base electrode on the base layer; and forming an emitter electrode on the emitter layer. This provides a method for manufacturing a solar cell that can bring high photoelectric conversion efficiency while decreasing the number of steps.
    Type: Application
    Filed: October 25, 2016
    Publication date: October 3, 2019
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takenori WATABE, Hiroshi HASHIGAMI, Hiroyuki OHTSUKA
  • Publication number: 20190252561
    Abstract: A solar battery cell including a finger electrode on a first main surface of a semiconductor substrate, the solar battery cell being including at least a surface of the finger electrode is covered with a material containing an insulating material so that the surface is not exposed, and the material containing the insulating material does not hydrolyze or does not generate a carboxylic acid when it hydrolyzes. Consequently, it is possible to provide a solar battery cell which suppresses a reduction in photoelectric conversion efficiency with time even though EVA is used and to provide a photovoltaic module using this solar battery cell.
    Type: Application
    Filed: December 1, 2016
    Publication date: August 15, 2019
    Applicant: SHIN-ETSU Chemical Co., Ltd.
    Inventors: Takenori WATABE, Yoko MATSUO, Hiroshi HASHIGAMI, Hiroyuki OHTSUKA
  • Publication number: 20190221700
    Abstract: In a back contact type solar cell in which an impurity diffusion layer where second conductive type impurities are diffused is formed on a back surface, as a non-light receiving surface, of a first conductive type semiconductor substrate, and an electrode in contact with the impurity diffusion layer is provided, a surface concentration of the impurities in the impurity diffusion layer is not less than 5×1017 atms/cm3 and not more than 5×1019 atms/cm3, and a diffusion depth of the impurities in the impurity diffusion layer is not smaller than 1 ?m and not larger than 2.9 ?m from a top of the back surface. It is thereby possible to provide a high efficiency back contact type solar cell which can be manufactured by a simple method at low cost.
    Type: Application
    Filed: December 13, 2016
    Publication date: July 18, 2019
    Inventors: Ryo MITTA, Hiroshi HASHIGAMI, Takenori WATABE, Hiroyuki OHTSUKA
  • Patent number: 10344638
    Abstract: An internal combustion engine system is provided with a cam switching device including a cam groove provided on the outer peripheral surface or a camshaft and an actuator capable of protruding, toward the camshaft, an engagement pin that is engageable with the cam groove. The internal combustion engine system is configured, in causing the cam switching device to perform a cam switching operation, to control the actuator such that the engagement pin is seated on a forward outer peripheral surface which is located more forward than an end of the cam groove on the forward side with respect to an insert section of the cam groove in the rotational direction of the camshaft.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: July 9, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keisuke Sasaki, Noriyasu Adachi, Shigehiro Sugihira, Takayoshi Kawai, Shinji Sadakane, Hiroyuki Sugihara, Kaoru Ohtsuka
  • Publication number: 20190181288
    Abstract: A back surface electrode type solar cell in which a p-type region having a p-conductive type, and an n-type region which has an n-conductive type and in which maximum concentration of additive impurities for providing the n-conductive type in a substrate width direction is equal to or higher than 5×1018 atoms/cm3 are disposed on a first main surface of a crystal silicon substrate, a first passivation film is disposed so as to cover the p-type region and the n-type region, and a second passivation film is disposed on a second main surface which is a surface opposite to the first main surface so as to cover the second main surface, the first passivation film and the second passivation film being formed with a compound containing oxide aluminum.
    Type: Application
    Filed: November 7, 2016
    Publication date: June 13, 2019
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Hiroshi HASHIGAMI, Takenori WATABE, Hiroyuki OHTSUKA, Ryo MITTA
  • Publication number: 20190165191
    Abstract: A method for manufacturing a solar cell having preparing a semiconductor substrate having a dielectric film on at least a first main surface, partially removing the dielectric film of the semiconductor substrate, and forming an electrode along a region where the dielectric film is partially removed, including measuring relative positional relationship between a position of a region where the dielectric film is partially removed and a position of the formed electrode in the semiconductor substrate after partially removing the dielectric film and forming the electrode, wherein for a newly prepared semiconductor substrate having a dielectric film on at least a first main surface, the dielectric film is partially removed after adjusting a position of a region based on the measured positional relationship. This improves the yield ratio of the solar cell by reducing positional displacement between the region where the dielectric film is partially removed and the electrode.
    Type: Application
    Filed: October 14, 2016
    Publication date: May 30, 2019
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takenori WATABE, Ryo MITTA, Hiroshi HASHIGAMI, Hiroyuki OHTSUKA
  • Publication number: 20190157478
    Abstract: A method for manufacturing a solar cell, including the steps of: forming unevenness on both of main surfaces of a semiconductor substrate of a first conductivity type; forming a base layer on a first main surface of the semiconductor substrate; forming a diffusion mask on the base layer; removing the diffusion mask in a pattern; forming an emitter layer on the portion of the first main surface where the diffusion mask have been removed; removing the remaining diffusion mask; forming a dielectric film on the first main surface; forming a base electrode on the base layer; and forming an emitter electrode on the emitter layer. This provides a method for manufacturing a solar cell that can bring high photoelectric conversion efficiency while decreasing the number of steps.
    Type: Application
    Filed: October 25, 2016
    Publication date: May 23, 2019
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takenori WATABE, Ryo MITTA, Hiroshi HASHIGAMI, Hiroyuki OHTSUKA
  • Patent number: 10294835
    Abstract: When a stop request to the engine is issued, it is determined whether or not all of the drive cams are large cams. When it is determined that at least one of the small cams is included in the drive cams, the engine is continued to drive for a while and a switch control for switching the drive cams from the small cams to the large cams is executed within the duration. A self-holding type solenoid is used to switch between the small cams and the large cams. In the switch control, a permission to stop the engine is output at a timing when the “pin protrudable section” of the final cylinder #2 has elapsed.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: May 21, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kaoru Ohtsuka, Hiroyuki Sugihara, Shinji Sadakane, Noriyasu Adachi, Shigehiro Sugihara, Keisuke Sasaki, Takayoshi Kawai
  • Publication number: 20190149702
    Abstract: An imaging apparatus includes an imager, a receiver, a synchronization signal generator, and a time code controller. The imager performs an imaging operation according to a synchronization signal. The receiver receives a time code signal including time code information and a synchronization pattern for detecting the time code information from another imaging apparatus. The synchronization signal generator generates the synchronization signal so as to be synchronized with a timing of the synchronization pattern included in the time code signal received. The time code controller generates a time code based on the synchronization signal and the time code information received.
    Type: Application
    Filed: November 8, 2018
    Publication date: May 16, 2019
    Inventors: Hiroyuki SATOH, Masato IZAWA, Yuichi SUZUKI, Yoshio OHTSUKA
  • Publication number: 20190131471
    Abstract: A solar cell including: a semiconductor substrate having a first conductivity type; a first conductivity type layer having a conductivity type equal to the first conductivity type and a second conductivity type layer having a second conductivity type opposite to the first conductivity type, which are located on a first main surface of the substrate; a first collecting electrode on the first conductivity type layer located on the first main surface; and a second collecting electrode on the second conductivity type layer located on the first main surface. In the solar cell, a second conductivity type layer having the second conductivity type is formed on a side surface of the semiconductor substrate and continuously from the second conductivity type layer located on the first main surface. Consequently, it is possible to provide a solar cell having excellent conversion efficiency and being capable of efficiently collecting carriers.
    Type: Application
    Filed: April 7, 2017
    Publication date: May 2, 2019
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takenori WATABE, Hiroyuki OHTSUKA