Patents by Inventor Kunta Yoshikawa

Kunta Yoshikawa 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: 11177407
    Abstract: A method of manufacturing a back electrode type solar cell, may include forming by physical vapor deposition at least one layer of an electrode material film on both a first conductivity type semiconductor layer, to give a first electrode layer, and a second conductivity type semiconductor layer, to give a second electrode layer, and patterning the first electrode layer and the second electrode layer each in a strip-like shape such that the first electrode layer and the second electrode layer both extend in a first direction and are arranged in a second direction by removing a part of the electrode material film.
    Type: Grant
    Filed: March 17, 2020
    Date of Patent: November 16, 2021
    Assignee: KANEKA CORPORATION
    Inventors: Tooru Irie, Wataru Yoshida, Kunta Yoshikawa
  • Patent number: 11125612
    Abstract: A photoelectric conversion element for detecting the spot size of incident light. The photoelectric conversion element includes a photoelectric conversion substrate having two principal surfaces, and the substrate includes a first sensitivity part and a second sensitivity part that are separated from each other. When a sensitivity area appearing on the principal surface of the first sensitivity part is defined as a first sensitivity area and a sensitivity area appearing on the principal surface of the second sensitivity part is defined as a second sensitivity area, the first sensitivity area receives at least a portion of incident light incident on a light receiving surface, and a pattern is formed such that an increase in an irradiation area of the principal surface irradiated with the incident light reduces the ratio of the first sensitivity area to the second sensitivity area in the irradiation area.
    Type: Grant
    Filed: March 3, 2020
    Date of Patent: September 21, 2021
    Assignee: KANEKA CORPORATION
    Inventors: Kunta Yoshikawa, Takashi Kuchiyama
  • Publication number: 20210288196
    Abstract: A solar cell includes a semiconductor substrate having a photoelectric conversion section, a first electrode, and a second electrode. The semiconductor substrate has a thickness of 70 ?m or more and 200 ?m or less. A chipping mark is present on an edge of at least one principal surface of the semiconductor substrate. The maximum length of the chipping mark along a side of the semiconductor substrate is 45 ?m or less. The semiconductor substrate does not have a scribe mark due to laser irradiation. The solar cell can suppress a reduction in the fill factor.
    Type: Application
    Filed: June 9, 2017
    Publication date: September 16, 2021
    Inventors: Kunihiro NAKANO, Kunta YOSHIKAWA, Kenji YAMAMOTO
  • Patent number: 11063160
    Abstract: A solar cell module includes a solar cell string including a plurality of solar cells connected through a wiring member. The solar cell includes a photoelectric conversion section, a light-receiving-surface electrode disposed on a light-receiving surface of the photoelectric conversion section, and a metal film disposed on a back face of the photoelectric conversion section. The metal film has a plurality of openings along the extending direction of the wiring member, in a connection region between the solar cell and the wiring member. The wiring member is connected through an adhesive layer to the metal film and to the photoelectric conversion section exposed from the openings of the metal film or an electrode fixed on the photoelectric conversion section. There is a non-bonding portion between the metal film and the photoelectric conversion section.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: July 13, 2021
    Assignee: KANEKA CORPORATION
    Inventors: Toru Terashita, Kunta Yoshikawa
  • Publication number: 20210175383
    Abstract: In a solar cell device, adjacent solar cells are connected such that one of the adjacent solar cells overlaps with the other while having a connection member interposed therebetween. In the solar cell, a region in an end portion overlaid by the adjacent solar cell is referred to as an overlapping region, a region in the overlapping region which is in contact with the connection member is referred to as a connection region, and a region in the overlapping region which surrounds the connection region is referred to as a surrounding region. In the solar cell, outside the overlapping region, a surface of the metal electrode layer is covered with an oxide film, and the surface of the metal electrode layer in the connection region and a portion of the surface of the metal electrode layer in the surrounding region are not covered with an oxide film.
    Type: Application
    Filed: April 1, 2019
    Publication date: June 10, 2021
    Inventors: Kunta YOSHIKAWA, Shinya OMOTO, Yuji TAKAHASHI
  • Publication number: 20210135027
    Abstract: A solar cell includes a semiconductor substrate, a first conductive layer, a second conductive layer, a first electrode, a second electrode, and an island-shaped conductive layer. The first conductive layer and the second conductive layer are disposed on one principal surface of the semiconductor substrate. The first electrode is disposed on the first conductive layer and the second electrode is disposed on the second conductive layer. The first electrode and the second electrode are electrically separated, and the island-shaped conductive layer is disposed between the first electrode and the second electrode.
    Type: Application
    Filed: January 8, 2021
    Publication date: May 6, 2021
    Applicant: KANEKA CORPORATION
    Inventors: Katsunori Konishi, Kunihiro Nakano, Hayato Kawasaki, Kunta Yoshikawa
  • Patent number: 10998456
    Abstract: The solar cell includes a plurality of light-receiving-side finger electrodes on a light-receiving surface of a photoelectric conversion section having a semiconductor junction. The light-receiving surface of the photoelectric conversion section is covered with a first insulating layer. Each light-receiving-side finger electrodes include: a first metal seed layer provided between the photoelectric conversion section and the first insulating layer; and a first plating metal layer being conduction with the first metal seed layer through openings formed in the first insulating layer. The solar cell includes an isolated plating metal layer pieces contacting neither the light-receiving-side finger electrodes nor the back-side finger electrodes. On the surface of the first insulating layer, an isolated plating metal crowded region is present in a form of a band-shape extending parallel to an extending direction of the light-receiving-side finger electrodes.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: May 4, 2021
    Assignee: KANEKA CORPORATION
    Inventors: Kunta Yoshikawa, Daisuke Adachi, Toru Terashita, Masafumi Hiraishi
  • Publication number: 20210111287
    Abstract: A photovoltaic device according to the present disclosure includes: a first-conductivity-type semiconductor film provided on a back side of a semiconductor substrate; a second-conductivity-type semiconductor film in which at least a part thereof is provided in a position different, in plan view, from a position of the first-conductivity-type semiconductor film on the back side of the semiconductor substrate; a protective film, which is formed on a back side of the first-conductivity-type semiconductor film and a back side of the second-conductivity-type semiconductor film, and which includes a conductive portion and a non-conductive transformed portion; and an electrode film formed on a back side of the conductive portion. The transformed portion of the protective film is provided along a conduction path between a back surface of the first-conductivity-type semiconductor film and a back surface of the second-conductivity-type semiconductor film.
    Type: Application
    Filed: December 22, 2017
    Publication date: April 15, 2021
    Inventors: Kunihiro NAKANO, Kunta YOSHIKAWA, Takashi KUCHIYAMA
  • Patent number: 10964826
    Abstract: A photoelectric conversion section of a solar cell has a first electrode layer and a collecting electrode that are formed in this order on a first principal surface, and has a second electrode layer that is formed on a second principal surface. The collecting electrode includes a first electroconductive layer, an insulating layer, and a second electroconductive layer in this order on the first electrode layer. The first and second electroconductive layers are electrically connected via an opening section in the insulating layer. At peripheral edge of the first and second principal surfaces, the photoelectric conversion section has an insulating region excluding the first or second electrode layer. On the side of the principal surface having no insulating region, the first or second electrode layer is formed up to the peripheral end of the relevant principal surface.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: March 30, 2021
    Assignee: KANEKA CORPORATION
    Inventors: Daisuke Adachi, Kunta Yoshikawa
  • Patent number: 10962411
    Abstract: A photoelectric conversion element for detecting the spot size of input light. The photoelectric conversion element includes a photoelectric conversion substrate having two main surfaces; a first conductivity-type semiconductor layer and a first electrode layer, which are sequentially laminated on the light receiving surface side, i.e., one main surface, of the photoelectric conversion substrate; and a second conductivity-type semiconductor layer and a second electrode layer, which are sequentially laminated on the rear surface side, i.e., the other main surface, of the photoelectric conversion substrate. The photoelectric conversion element is also provided with an insulating layer that is provided between the photoelectric conversion substrate and the second electrode layer, and the insulating layer has a plurality of through holes that are two-dimensionally provided along the main surface of the photoelectric conversion substrate.
    Type: Grant
    Filed: March 4, 2020
    Date of Patent: March 30, 2021
    Assignee: KANEKA CORPORATION
    Inventor: Kunta Yoshikawa
  • Patent number: 10916667
    Abstract: A solar cell includes a semiconductor substrate, a first conductive layer, a second conductive layer, a first electrode, a second electrode, and an island-shaped conductive layer. The first conductive layer and the second conductive layer are disposed on one principal surface of the semiconductor substrate. The first electrode is disposed on the first conductive layer and the second electrode is disposed on the second conductive layer. The first electrode and the second electrode are electrically separated, and the island-shaped conductive layer is disposed between the first electrode and the second electrode.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: February 9, 2021
    Assignee: KANEKA CORPORATION
    Inventors: Katsunori Konishi, Kunihiro Nakano, Hayato Kawasaki, Kunta Yoshikawa
  • Patent number: 10854767
    Abstract: The solar cell includes an n-type semiconductor layer and a p-type semiconductor layer on a first principal surface of a crystalline silicon substrate. The n-type semiconductor layer is provided so as to extend over a part on a p-type semiconductor layer-formed region provided with the p-type semiconductor layer, and a p-type semiconductor layer non-formed-region where the p-type semiconductor layer is not provided. In a region where the n-type semiconductor layer is provided on the p-type semiconductor layer, a protecting layer is between the p-type semiconductor layer and the n-type semiconductor layer. The protecting layer includes: an underlying protecting layer that is in contact with the p-type semiconductor layer; and an insulating layer that is on the underlying protecting layer. The underlying protecting layer includes an intrinsic silicon-based layer or an n-type silicon-based layer.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: December 1, 2020
    Assignee: KANEKA CORPORATION
    Inventors: Hayato Kawasaki, Kunta Yoshikawa, Kunihiro Nakano, Katsunori Konishi, Kenji Yamamoto
  • Patent number: 10727360
    Abstract: A method for manufacturing a photoelectric conversion device, wherein the photoelectric conversion device includes a semiconductor substrate having a first conductivity-type region, a second conductivity-type region, and a boundary region on a first principal surface of a semiconductor substrate, the boundary region being in contact with and separating the first conductivity-type region and the second conductivity-type region, the method including: stacking a second conductivity-type semiconductor layer over the second conductivity-type region and the boundary region on the first principal surface of the semiconductor substrate; stacking an insulating layer over the second conductivity-type semiconductor layer in the boundary region; stacking a first conductivity-type semiconductor layer over the first conductivity-type region on the first principal surface of the semiconductor substrate and on the insulating layer; stacking an electrode layer on the first conductivity-type semiconductor layer and the second
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: July 28, 2020
    Assignee: KANEKA CORPORATION
    Inventors: Katsunori Konishi, Kunta Yoshikawa, Hayato Kawasaki, Kunihiro Nakano
  • Publication number: 20200220037
    Abstract: A method of manufacturing a back electrode type solar cell, may include forming by physical vapor deposition at least one layer of an electrode material film on both a first conductivity type semiconductor layer, to give a first electrode layer, and a second conductivity type semiconductor layer, to give a second electrode layer, and patterning the first electrode layer and the second electrode layer each in a strip-like shape such that the first electrode layer and the second electrode layer both extend in a first direction and are arranged in a second direction by removing a part of the electrode material film.
    Type: Application
    Filed: March 17, 2020
    Publication date: July 9, 2020
    Applicant: KANEKA CORPORATION
    Inventors: Tooru Irie, Wataru Yoshida, Kunta Yoshikawa
  • Publication number: 20200203540
    Abstract: A solar cell, such as a back contact solar cell that can be cut into an arbitrary shape, includes a semiconductor substrate; a first conductivity-type semiconductor layer and a second conductivity-type semiconductor layer, disposed on the back surface of the semiconductor substrate; first electrode layers corresponding to the first conductivity-type semiconductor layer, and a second electrode layer corresponding to the second conductivity-type semiconductor layer. The second electrode layer and the plurality of first electrode layers form a sea-island structure in which the first electrode layers are in the form of islands, while the second electrode layer is in the form of sea. This solar cell also includes a plate electrode which is arranged to face the back surface of the semiconductor substrate, and which is connected to the plurality of first electrode layers, while being not connected to the second electrode layer.
    Type: Application
    Filed: March 3, 2020
    Publication date: June 25, 2020
    Applicant: KANEKA CORPORATION
    Inventors: Hisashi UZU, Takashi KUCHIYAMA, Kunta YOSHIKAWA
  • Publication number: 20200200601
    Abstract: A photoelectric conversion element for detecting the spot size of input light. The photoelectric conversion element includes a photoelectric conversion substrate having two main surfaces; a first conductivity-type semiconductor layer and a first electrode layer, which are sequentially laminated on the light receiving surface side, i.e., one main surface, of the photoelectric conversion substrate; and a second conductivity-type semiconductor layer and a second electrode layer, which are sequentially laminated on the rear surface side, i.e., the other main surface, of the photoelectric conversion substrate. The photoelectric conversion element is also provided with an insulating layer that is provided between the photoelectric conversion substrate and the second electrode layer, and the insulating layer has a plurality of through holes that are two-dimensionally provided along the main surface of the photoelectric conversion substrate.
    Type: Application
    Filed: March 4, 2020
    Publication date: June 25, 2020
    Applicant: KANEKA CORPORATION
    Inventor: Kunta YOSHIKAWA
  • Publication number: 20200200599
    Abstract: A photoelectric conversion element for detecting the spot size of incident light. The photoelectric conversion element includes a photoelectric conversion substrate having two principal surfaces, and the substrate includes a first sensitivity part and a second sensitivity part that are separated from each other. When a sensitivity area appearing on the principal surface of the first sensitivity part is defined as a first sensitivity area and a sensitivity area appearing on the principal surface of the second sensitivity part is defined as a second sensitivity area, the first sensitivity area receives at least a portion of incident light incident on a light receiving surface, and a pattern is formed such that an increase in an irradiation area of the principal surface irradiated with the incident light reduces the ratio of the first sensitivity area to the second sensitivity area in the irradiation area.
    Type: Application
    Filed: March 3, 2020
    Publication date: June 25, 2020
    Applicant: KANEKA CORPORATION
    Inventors: Kunta YOSHIKAWA, Takashi KUCHIYAMA
  • Publication number: 20200200600
    Abstract: A photoelectric conversion device for detecting the spot size of incident light, includes a photoelectric conversion element having a photoelectric conversion substrate with two main surfaces, and first and second sensitivity section sections; and scanners that relatively scan incident light on the main surfaces of the photoelectric conversion element. When a sensitivity region on a main surface of the first sensitivity section is defined as a first sensitivity region and sensitivity regions that appear on a main surface of the second sensitivity sections are defined as second sensitivity regions, the first sensitivity region receives at least part of the light incident on the main surface during scanning, and has a pattern in which, in accordance with enlargement of an irradiation region irradiated with incident light on the main surface, the proportion of the first sensitivity region with respect to the second sensitivity regions in the irradiation region is decreased.
    Type: Application
    Filed: March 4, 2020
    Publication date: June 25, 2020
    Applicant: KANEKA CORPORATION
    Inventor: Kunta YOSHIKAWA
  • Publication number: 20200203539
    Abstract: A solar cell in which performance degradation caused by an alkali component is suppressed. A solar cell is a back-contact solar cell that comprises a semiconductor substrate; a p-type semiconductor layer, and a first electrode layer corresponding thereto, layered sequentially on one part of the rear side of the semiconductor substrate; an n-type semiconductor layer, and a second electrode layer corresponding thereto, layered sequentially on another part of the rear side of the semiconductor substrate. One part of the n-type semiconductor layer lies directly atop one part of the adjacent p-type semiconductor layer. The first electrode layer is separate from the n-type semiconductor layer and covers the p-type semiconductor layer. The second electrode layer covers the entirety of an overlapping portion where the n-type semiconductor layer lies atop the p-type semiconductor layer.
    Type: Application
    Filed: March 3, 2020
    Publication date: June 25, 2020
    Applicant: KANEKA CORPORATION
    Inventors: Kunta YOSHIKAWA, Hisashi UZU
  • Publication number: 20200203545
    Abstract: A solar cell module which exhibits high output while ensuring connection strength between solar cells; and a solar cell suitable for the solar cell module. In the solar cell, a region on a first surface and at a first edge of a substrate that is not covered by a p-type transparent oxide electrode layer is defined as a “region A,” and a region on the first surface and at a second edge opposite to the first edge of the substrate and not covered by the p-type transparent oxide electrode layer is defined as a “region B.” The area of the region A is larger than the area of the region B.
    Type: Application
    Filed: February 28, 2020
    Publication date: June 25, 2020
    Inventors: Yuji TAKAHASHI, Kunta YOSHIKAWA, Shinya OMOTO