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).

  • 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: 20200176628
    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 comprises a first sensitive part and a second sensitive part that have mutually different photoelectric conversion characteristics. When a sensitive region appearing in the principal surface of the first sensitive part is defined as a first sensitive region, and a sensitive region appearing in the principal surface of the second sensitive part is defined as a second sensitive region, the first sensitive region is configured to receive at least a portion of light incident on a light-receiving surface and to decrease, proportionally to enlargement in an irradiation region of the principal surface irradiated with the incident light, the ratio of the first sensitive region to the second sensitive region in the irradiation region.
    Type: Application
    Filed: February 7, 2020
    Publication date: June 4, 2020
    Applicant: KANEKA CORPORATION
    Inventors: Kunta YOSHIKAWA, Takashi KUCHIYAMA
  • Patent number: 10644178
    Abstract: A solar cell includes: first conductivity-type layers and second conductivity-type layers each provided on a rear surface of a semiconductor substrate; first electrodes provided on the first conductivity-type layers; and second electrodes provided on the second conductivity-type layers. The first electrodes and the second electrodes are spaced apart from each other, and the first electrodes include a plurality of regions isolated from one another by the second electrodes disposed therebetween. Each of the plurality of regions of the first electrodes includes a non-mounting electrode section and a wiring-mounting electrode section having a larger electrode height than the non-connection electrode section. In two adjacent first electrode regions, an imaginary line connecting the top of the wiring-mounting electrode section of one of the regions and the top of the wiring-mounting electrode section of the other region does not cross the second electrode disposed between the two regions.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: May 5, 2020
    Assignee: KANEKA CORPORATION
    Inventors: Kunta Yoshikawa, Kunihiro Nakano, Hayato Kawasaki, Katsunori Konishi
  • Publication number: 20200135943
    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: Application
    Filed: December 31, 2019
    Publication date: April 30, 2020
    Inventors: Kunta YOSHIKAWA, Daisuke ADACHI, Toru TERASHITA, Masafumi HIRAISHI
  • Patent number: 10593820
    Abstract: In the solar cell module, a first solar cell and a second solar cell are stacked together with an electroconductive member interposed therebetween, such that a cleaved surface-side periphery on a light-receiving surface of the first solar cell overlaps a periphery on a back surface of the second solar cell. The first solar cell and the second solar cell each have: photoelectric conversion section including a crystalline silicon substrate; collecting electrode; and back electrode. At a section where the first solar cell and the second solar cell are stacked, the collecting electrode of the first solar cell and the back electrode of the second solar cell are electrically connected to each other by coming into contact with the electroconductive member. An insulating member is provided on a part of the cleaved surface-side periphery on the light-receiving surface of the first solar cell, where the collecting electrode is not provided.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: March 17, 2020
    Assignee: KANEKA CORPORATION
    Inventors: Kunihiro Nakano, Kunta Yoshikawa, Toru Terashita, Masafumi Hiraishi, Kenji Yamamoto
  • Patent number: 10566470
    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: January 7, 2016
    Date of Patent: February 18, 2020
    Assignee: KANEKA CORPORATION
    Inventors: Kunta Yoshikawa, Daisuke Adachi, Toru Terashita, Masafumi Hiraishi
  • Publication number: 20190393370
    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: Application
    Filed: September 4, 2019
    Publication date: December 26, 2019
    Applicant: KANEKA CORPORATION
    Inventors: Katsunori Konishi, Kunta Yoshikawa, Hayato Kawasaki, Kunihiro Nakano
  • Publication number: 20190393369
    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: Application
    Filed: August 30, 2019
    Publication date: December 26, 2019
    Applicant: KANEKA CORPORATION
    Inventors: Toru Terashita, Kunta Yoshikawa
  • Patent number: 10446698
    Abstract: A photoelectric conversion device includes, on one principal surface of a semiconductor substrate, a first conductivity-type region, a second conductivity-type region, and a boundary region which is in contact with each of the first conductivity-type region and the second conductivity-type region to separate these two regions. A first conductivity-type semiconductor layer is disposed over the entire first conductivity-type region and extending over the boundary region. A second conductivity-type semiconductor layer is disposed over the entire second conductivity-type region and extending over the boundary region. An insulating layer is disposed over the entire boundary region. A first electrode is disposed over the entire first conductivity-type region and extending over the boundary region, and a second electrode is disposed over the second conductivity-type region.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: October 15, 2019
    Assignee: KANEKA CORPORATION
    Inventors: Katsunori Konishi, Kunta Yoshikawa, Hayato Kawasaki, Kunihiro Nakano
  • Publication number: 20190259885
    Abstract: A solar cell includes a rectangular crystalline silicon substrate having a rectangular first principal surface, a rectangular second principal surface, a first lateral surface, and a second lateral surface, one or more thin films, and a non-natural oxide film of silicon. The rectangular second principal surface may be positioned on a side opposite to the first principal surface. The first lateral surface may connect a first long side of the first principal surface and a first long side of the second principal surface, and the second lateral surface may be positioned on a side opposite to the first lateral surface and connect a second long side of the first principal surface and a second long side of the second principal surface. At least one of the first principal surface or the second principal surface may be covered with the one or more thin-films.
    Type: Application
    Filed: May 2, 2019
    Publication date: August 22, 2019
    Applicant: KANEKA CORPORATION
    Inventor: Kunta Yoshikawa
  • Patent number: 10361325
    Abstract: In the solar cell module, a first solar cell and a second solar cell are stacked together with an electroconductive member interposed therebetween, such that a cleaved surface-side periphery on a light-receiving surface of the first solar cell overlaps a periphery on a back surface of the second solar cell. The first solar cell and the second solar cell each have: photoelectric conversion section including a crystalline silicon substrate; collecting electrode; and back electrode. At a section where the first solar cell and the second solar cell are stacked, the collecting electrode of the first solar cell and the back electrode of the second solar cell are electrically connected to each other by coming into contact with the electroconductive member. An insulating member is provided on a part of the cleaved surface-side periphery on the light-receiving surface of the first solar cell, where the collecting electrode is not provided.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: July 23, 2019
    Assignee: KANEKA CORPORATION
    Inventors: Kunihiro Nakano, Kunta Yoshikawa, Toru Terashita, Masafumi Hiraishi, Kenji Yamamoto
  • Patent number: 10340848
    Abstract: An I-V measurement method is provided for a solar cell having a collecting electrode on the first surface side of a single-crystalline silicon substrate of a first conductivity type and having a transparent electrode on the outermost surface on the second surface side of the single-crystalline silicon substrate of the first conductivity-type. An electric current is supplied to the solar cell in a state in which flexible metal foil and the transparent electrode are brought into detachable contact with each other such that the flexible metal foil follows undulations of the single-crystalline silicon substrate of a first conductivity type, and the first surface is set as a light-receiving surface. It is preferable that at least on a portion that is in contact with the transparent electrode, the metal foil is formed of at least one selected from the group consisting of Sn, Ag, Ni, In, and Cu.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: July 2, 2019
    Assignee: KANEKA CORPORATION
    Inventors: Kunta Yoshikawa, Hayato Kawasaki, Kunihiro Nakano, Kenji Yamamoto
  • Publication number: 20190189812
    Abstract: A solar cell includes a rectangular-shaped semiconductor substrate having a first principal surface and a second principal surface, and a metal electrode. The second principal surface includes a plurality of band-shaped first conductivity-type regions that comprise a first conductivity-type semiconductor layer and a plurality of band-shaped second conductivity-type regions that comprise a second conductivity-type semiconductor layer. The metal electrode may be disposed on the second principal surface, and no metal electrode may be provided on the first principal surface. The second conductivity-type semiconductor layer may have a conductivity-type different from that of the first conductivity-type semiconductor layer. The semiconductor substrate may include a first direction end portion region at both end portions of the semiconductor substrate in a first direction, and a first direction central region is present between the two first direction end portion regions.
    Type: Application
    Filed: February 22, 2019
    Publication date: June 20, 2019
    Applicant: KANEKA CORPORATION
    Inventors: Kunta Yoshikawa, Hayato Kawasaki, Wataru Yoshida
  • Publication number: 20190123221
    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: December 14, 2018
    Publication date: April 25, 2019
    Applicant: KANEKA CORPORATION
    Inventors: Katsunori Konishi, Kunihiro Nakano, Hayato Kawasaki, Kunta Yoshikawa
  • Publication number: 20190109253
    Abstract: A solar cell includes a conductive crystalline silicon substrate, a first conductive silicon layer, a second conductive silicon layer, a first intrinsic silicon layer, and a second intrinsic silicon layer. The first conductive silicon layer and the second conductive silicon layer are disposed on one principal surface of the conductive crystalline silicon substrate and are electrically insulated from each other. The second conductive silicon layer includes a first portion and a second portion, where the first portion is separated from the conductive crystalline silicon substrate by the first intrinsic silicon layer and the first conductive silicon layer, and where the second portion is separated from the conductive crystalline silicon substrate by the second intrinsic silicon layer. The first intrinsic silicon layer has a greater thickness than the second intrinsic silicon layer.
    Type: Application
    Filed: November 21, 2018
    Publication date: April 11, 2019
    Applicant: KANEKA CORPORATION
    Inventors: Hayato Kawasaki, Kunta Yoshikawa, Kunihiro Nakano, Katsunori Konishi
  • Publication number: 20180294366
    Abstract: A photoelectric conversion device includes, on one principal surface of a semiconductor substrate, a first conductivity-type region, a second conductivity-type region, and a boundary region which is in contact with each of the first conductivity-type region and the second conductivity-type region to separate these two regions. A first conductivity-type semiconductor layer is disposed over the entire first conductivity-type region and extending over the boundary region. A second conductivity-type semiconductor layer is disposed over the entire second conductivity-type region and extending over the boundary region. An insulating layer is disposed over the entire boundary region. A first electrode is disposed over the entire first conductivity-type region and extending over the boundary region, and a second electrode is disposed over the second conductivity-type region.
    Type: Application
    Filed: June 7, 2018
    Publication date: October 11, 2018
    Applicant: Kaneka Corporation
    Inventors: Katsunori Konishi, Kunta Yoshikawa, Hayato Kawasaki, Kunihiro Nakano
  • Publication number: 20180122966
    Abstract: A solar cell module includes a first solar cell including, in the following order, a single-crystalline silicon substrate, a conductive silicon layer, and a back side transparent electrode layer, where the conductive silicon layer and the back side transparent electrode layer are disposed on a back side of the single-crystalline silicon substrate; an encapsulant; and a flexible metal foil disposed between the back side transparent electrode layer and the encapsulant. The flexible metal foil is in contact with the back side transparent electrode layer in a non-bonded state. The encapsulant encapsulates the first solar cell and maintains a contact state between the flexible metal foil and the back side transparent electrode layer.
    Type: Application
    Filed: December 28, 2017
    Publication date: May 3, 2018
    Applicant: Kaneka Corporation
    Inventors: Kunta Yoshikawa, Hayato Kawasaki, Kunihiro Nakano, Toru Terashita
  • Publication number: 20180083152
    Abstract: A crystalline silicon solar cell module includes a crystalline silicon solar cell and an interconnector. The interconnector is electrically connected to the crystalline silicon solar cell. The crystalline silicon solar cell includes a photoelectric conversion section that has a first surface and a second surface opposite to the first surface. The crystalline silicon solar cell also includes a plurality of first finger electrodes arranged side by side on the first surface of the photoelectric conversion section. The crystalline silicon solar cell further includes a first insulating layer over the first surface of the photoelectric conversion section and the first finger electrodes. The interconnector extends across the plurality of first finger electrodes and electrically connects the first finger electrodes. The first insulating layer has an opening through which the first finger electrodes and the interconnector are electrically connected.
    Type: Application
    Filed: June 15, 2016
    Publication date: March 22, 2018
    Inventors: Kunta YOSHIKAWA, Toru TERASHITA, Kunihiro NAKANO, Hayato KAWASAKI, Katsunori KONISHI
  • Publication number: 20180069144
    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: Application
    Filed: March 7, 2016
    Publication date: March 8, 2018
    Inventors: Hayato KAWASAKI, Kunta YOSHIKAWA, Kunihiro NAKANO, Katsunori KONISHI, Kenji YAMAMOTO
  • Publication number: 20180062012
    Abstract: A solar cell includes: first conductivity-type layers and second conductivity-type layers each provided on a rear surface of a semiconductor substrate; first electrodes provided on the first conductivity-type layers; and second electrodes provided on the second conductivity-type layers. The first electrodes and the second electrodes are spaced apart from each other, and the first electrodes include a plurality of regions isolated from one another by the second electrodes disposed therebetween. Each of the plurality of regions of the first electrodes includes a non-mounting electrode section and a wiring-mounting electrode section having a larger electrode height than the non-connection electrode section. In two adjacent first electrode regions, an imaginary line connecting the top of the wiring-mounting electrode section of one of the regions and the top of the wiring-mounting electrode section of the other region does not cross the second electrode disposed between the two regions.
    Type: Application
    Filed: September 20, 2017
    Publication date: March 1, 2018
    Applicant: Kaneka Corporation
    Inventors: Kunta Yoshikawa, Kunihiro Nakano, Hayato Kawasaki, Katsunori Konishi