Patents by Inventor Akira Isobe

Akira Isobe 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: 11948864
    Abstract: A semiconductor device has a first wiring extending in a first direction on a nitride semiconductor layer. A source electrode is electrically connected to the first wiring and extends in a second direction. A drain electrode extends in the second direction and includes a first and second portion extending in the second direction, spaced from each other in the first direction. An element isolation region is in the second nitride semiconductor layer between the first and second portions. A third portion extends in the second direction on the first and second portions. A gate electrode extends in the second direction on the second nitride semiconductor layer between the source electrode and the drain electrode. The portion includes holes therein aligned with each other along the second direction with the spacing between adjacent holes in the second direction increasing with increasing distance in the second direction from the first wiring.
    Type: Grant
    Filed: September 2, 2021
    Date of Patent: April 2, 2024
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventors: Akira Yoshioka, Hung Hung, Yasuhiro Isobe, Toru Sugiyama, Hitoshi Kobayashi
  • Publication number: 20240105826
    Abstract: A semiconductor device of an embodiment includes a semiconductor layer, a first insulating film provided on the semiconductor layer, a first electrode film provided on the first insulating film, a second electrode film provided on the first electrode film, and a first field plate electrode provided on the second electrode film. A lower end of the first field plate electrode is located on a second surface of the first electrode film, the second surface being in contact with the second electrode film, rather than a first surface of the first electrode film, the first surface being in contact with the first insulating film.
    Type: Application
    Filed: March 1, 2023
    Publication date: March 28, 2024
    Inventors: Hitoshi KOBAYASHI, Masaaki ONOMURA, Toru SUGIYAMA, Akira YOSHIOKA, Hung HUNG, Hideki SEKIGUCHI, Tetsuya OHNO, Yasuhiro ISOBE
  • Publication number: 20240105563
    Abstract: A semiconductor device includes a nitride semiconductor element, a first diode, and a second diode; the nitride semiconductor element includes a conductive mounting bed, a semiconductor substrate formed on the mounting bed, a first nitride semiconductor layer, a second nitride semiconductor layer, a first major electrode, a second major electrode, a first gate electrode, and a second gate electrode; the first diode includes a first anode electrode electrically connected to the mounting bed, and a first cathode electrode electrically connected to the first major electrode; and the second diode includes a second anode electrode electrically connected to the mounting bed, and a second cathode electrode electrically connected to the second major electrode.
    Type: Application
    Filed: March 9, 2023
    Publication date: March 28, 2024
    Inventors: Toru SUGIYAMA, Akira YOSHIOKA, Hitoshi KOBAYASHI, Hung HUNG, Yasuhiro ISOBE, Hideki SEKIGUCHI, Tetsuya OHNO, Masaaki ONOMURA
  • Publication number: 20240097671
    Abstract: A semiconductor device includes a first transistor, a first drive circuit including a second transistor, and a second drive circuit including a third transistor. The second transistor and the third transistor are connected in series; and a connection node of the second and third transistors is connected to a gate electrode of the first transistor. The first transistor, the second transistor, and the third transistor are normally-off MOS HEMTs formed in a first substrate that includes GaN. The first drive circuit charges a parasitic capacitance of the first transistor. The second drive circuit discharges the parasitic capacitance of the first transistor.
    Type: Application
    Filed: February 10, 2023
    Publication date: March 21, 2024
    Inventors: Toru SUGIYAMA, Noriaki YOSHIKAWA, Yasuhiko KURIYAMA, Akira YOSHIOKA, Hitoshi KOBAYASHI, Hung HUNG, Yasuhiro ISOBE, Tetsuya OHNO, Hideki SEKIGUCHI, Masaaki ONOMURA
  • Publication number: 20240088280
    Abstract: According to one embodiment, a nitride semiconductor device includes a first semiconductor layer having a heterojunction, a second semiconductor layer on the first semiconductor layer and having another heterojunction, a drain electrode on the second semiconductor layer, a source electrode provided on the first semiconductor layer, a gate electrode provided on the first semiconductor layer between the drain electrode and the source electrode, and a first insulating film between the gate electrode and the drain electrode covering the first semiconductor layer and the second semiconductor layer. The second semiconductor layer being separated from the gate electrode by a portion of the insulating film. A distance from the second semiconductor layer to the gate electrode is shorter than a distance from the drain electrode to the gate electrode.
    Type: Application
    Filed: February 28, 2023
    Publication date: March 14, 2024
    Inventors: Hung HUNG, Yasuhiro ISOBE, Akira YOSHIOKA, Toru SUGIYAMA, Hitoshi KOBAYASHI
  • Publication number: 20230408792
    Abstract: The present invention causes a holder to hold a plane mirror without causing damage to a reflection layer. Provided is a head-up display comprising a housing, a display device that emits display light, a plane mirror that reflects the display light, and a holder that holds the plane mirror, wherein the plane mirror has a base material, and a reflection layer provided on the base material and including a resin film, and the holder abuts on a portion of the base material in which the reflection layer is not provided.
    Type: Application
    Filed: November 2, 2021
    Publication date: December 21, 2023
    Inventors: Bunkichi KANEKO, Takashi ONDA, Yohei SATO, Yutaka FUJITA, Akira ISOBE, Genichiro SATO
  • Patent number: 11643572
    Abstract: To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid that are able to form a surface layer which is excellent in water/oil repellency, abrasion resistance, fingerprint stain removability, lubricity and outer appearance, and an article having such a surface layer. A fluorinated ether compound represented by A1-O—(Rf1O)m1-Q1-[C(O)N(R1)]p1—R11—C[—R12—SiR13n1X13-n1]3, wherein A1 is a C1-20 perfluoroalkyl group; Rf1 is a fluoroalkylene group having no branched structure; m1 is an integer from 2 to 210; Q1 is a single bond or a fluoroalkylene group having no branched structure; R1 is a hydrogen atom, etc.; p1 is 0 or 1; R11 is a single bond, an alkylene group, etc.; R12 is an alkylene group, etc.; R13 is a monovalent hydrocarbon group, etc.; X1 is a hydrolyzable group; and n1 is an integer of from 0 to 2.
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: May 9, 2023
    Assignee: AGC Inc.
    Inventors: Taiki Hoshino, Kiyotaka Takao, Kazue Toda, Kenji Ishizeki, Akira Isobe
  • Patent number: 11504740
    Abstract: To provide a water/oil repellent article which presents little burden on the environment, while being excellent in water/oil repellency, washing durability of the water repellency and friction durability of the water repellency; a method for producing such a water/oil repellent article; and a water/oil repellent composition and a water/oil repellent kit to be used for producing such a water/oil repellent article.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: November 22, 2022
    Assignee: AGC Inc.
    Inventors: Yukiko Shiota, Hiroyuki Hara, Akira Isobe, Reika Fukuda
  • Patent number: 11486450
    Abstract: A shaft coupling includes a drive hub that is coupled to a drive shaft to rotate integrally with the drive shaft, a driven hub that is coupled to a driven shaft to rotate integrally with the driven shaft, and a rotation transmission portion that transmits rotation between the drive hub and the driven hub. A dynamic vibration absorber is integrally coupled to a section of at least one of the drive hub and the driven hub. The section is an uninvolved section that is not involved in a torsional stiffness of the whole shaft coupling.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: November 1, 2022
    Assignee: NABEYA BI-TECH KABUSHIKI KAISHA
    Inventor: Akira Isobe
  • Publication number: 20210095160
    Abstract: To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid that are able to form a surface layer which is excellent in water/oil repellency, abrasion resistance, fingerprint stain removability, lubricity and outer appearance, and an article having such a surface layer. A fluorinated ether compound represented by A1-O—(Rf1O)m1-Q1-[C(O)N(R1)]p1—R11—C[—R12—SiR13n1X13-n1]3, wherein A1 is a C1-20 perfluoroalkyl group; Rf1 is a fluoroalkylene group having no branched structure; m1 is an integer from 2 to 210; Q1 is a single bond or a fluoroalkylene group having no branched structure; R1 is a hydrogen atom, etc.; p1 is 0 or 1; R11 is a single bond, an alkylene group, etc.; R12 is an alkylene group, etc.; R13 is a monovalent hydrocarbon group, etc.; X1 is a hydrolyzable group; and n1 is an integer of from 0 to 2.
    Type: Application
    Filed: December 11, 2020
    Publication date: April 1, 2021
    Applicant: AGC Inc.
    Inventors: Taiki HOSHINO, Kiyotaka TAKAO, Kazue TODA, Kenji ISHIZEKI, Akira ISOBE
  • Publication number: 20210047540
    Abstract: To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid that are able to form a surface layer which is excellent in water/oil repellency, abrasion resistance, fingerprint stain removability, lubricity and outer appearance, and an article having such a surface layer. A fluorinated ether compound represented by A1-O—(Rf1O)m1Q1-[C(O)N(R1)]p1—R11—C[—R12—SiR13n1X13-n1]3, wherein A1 is a C1-20 perfluoroalkyl group; Rf1 is a fluoroalkylene group having no branched structure; m1 is an integer from 2 to 210; Q1 is a single bond or a fluoroalkylene group having no branched structure; R1 is a hydrogen atom, etc.; p1 is 0 or 1; R11 is a single bond, an alkylene group, etc.; R12 is an alkylene group, etc.; R13 is a monovalent hydrocarbon group, etc.; X1 is a hydrolyzable group; and n1 is an integer of from 0 to 2.
    Type: Application
    Filed: September 30, 2020
    Publication date: February 18, 2021
    Applicant: AGC Inc.
    Inventors: Taiki HOSHINO, Kiyotaka TAKAO, Kazue TODA, Kenji ISHIZEKI, Akira ISOBE
  • Patent number: 10829666
    Abstract: To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid that are able to form a surface layer which is excellent in water/oil repellency, abrasion resistance, fingerprint stain removability, lubricity and outer appearance, and an article having such a surface layer. A fluorinated ether compound represented by A1-O—(Rf1O)m1-Q1-[C(O)N(R1)]p1—R11—C[—R12—SiR13n1X13-n1]3, wherein A1 is a C1-20 perfluoroalkyl group; Rf1 is a fluoroalkylene group having no branched structure; m1 is an integer from 2 to 210; Q1 is a single bond or a fluoroalkylene group having no branched structure; R1 is a hydrogen atom, etc.; p1 is 0 or 1; R11 is a single bond, an alkylene group, etc.; R12 is an alkylene group, etc.; R13 is a monovalent hydrocarbon group, etc.; X1 is a hydrolyzable group; and n1 is an integer of from 0 to 2.
    Type: Grant
    Filed: December 16, 2019
    Date of Patent: November 10, 2020
    Assignee: AGC Inc.
    Inventors: Taiki Hoshino, Kiyotaka Takao, Kazue Toda, Kenji Ishizeki, Akira Isobe
  • Publication number: 20200115589
    Abstract: To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid that are able to form a surface layer which is excellent in water/oil repellency, abrasion resistance, fingerprint stain removability, lubricity and outer appearance, and an article having such a surface layer. A fluorinated ether compound represented by A1—O—(Rf1O)m1-Q1[C(O)N(R1)]p1—R11C[—R12—SiR13n1X13-n1]3, wherein A1 is a C1-20 perfluoroalkyl group; Rf1 is a fluoroalkylene group having no branched structure; ml is an integer from 2 to 210; Q1 is a single bond or a fluoroalkylene group having no branched structure; R1 is a hydrogen atom, etc.; p1 is 0 or 1; R11 is a single bond, an alkylene group, etc.; R12 is an alkylene group, etc.; R13 is a monovalent hydrocarbon group, etc.; X1 is a hydrolyzable group; and n1 is an integer of from 0 to 2.
    Type: Application
    Filed: December 16, 2019
    Publication date: April 16, 2020
    Applicant: AGC Inc.
    Inventors: Taiki HOSHINO, Kiyotaka TAKAO, Kazue TODA, Kenji ISHIZEKI, Akira ISOBE
  • Patent number: 10550288
    Abstract: To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid that are able to form a surface layer which is excellent in water/oil repellency, abrasion resistance, fingerprint stain removability, lubricity and outer appearance, and an article having such a surface layer. A fluorinated ether compound represented by A1-O—(Rf1O)m1-Q1-[C(O)N(R1)]p1—R11—C[—R12—SiR13n1X13-n1]3, wherein A1 is a C1-20 perfluoroalkyl group; Rf1 is a fluoroalkylene group having no branched structure; m1 is an integer from 2 to 210; Q1 is a single bond or a fluoroalkylene group having no branched structure; R1 is a hydrogen atom, etc.; p1 is 0 or 1; R11 is a single bond, an alkylene group, etc.; R12 is an alkylene group, etc.; R13 is a monovalent hydrocarbon group, etc.; X1 is a hydrolyzable group; and n1 is an integer of from 0 to 2.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: February 4, 2020
    Assignee: AGC Inc.
    Inventors: Taiki Hoshino, Kiyotaka Takao, Kazue Toda, Kenji Ishizeki, Akira Isobe
  • Publication number: 20190345986
    Abstract: A shaft coupling includes a drive hub that is coupled to a drive shaft to rotate integrally with the drive shaft, a driven hub that is coupled to a driven shaft to rotate integrally with the driven shaft, and a rotation transmission portion that transmits rotation between the drive hub and the driven hub. A dynamic vibration absorber is integrally coupled to a section of at least one of the drive hub and the driven hub. The section is an uninvolved section that is not involved in a torsional stiffness of the whole shaft coupling.
    Type: Application
    Filed: January 27, 2017
    Publication date: November 14, 2019
    Inventor: Akira ISOBE
  • Publication number: 20190283080
    Abstract: To provide a water/oil repellent article which presents little burden on the environment, while being excellent in water/oil repellency, washing durability of the water repellency and friction durability of the water repellency; a method for producing such a water/oil repellent article; and a water/oil repellent composition and a water/oil repellent kit to be used for producing such a water/oil repellent article.
    Type: Application
    Filed: June 4, 2019
    Publication date: September 19, 2019
    Applicant: AGC Inc.
    Inventors: Yukiko SHIOTA, Hiroyuki HARA, Akira ISOBE, Reika FUKUDA
  • Patent number: 10378146
    Abstract: To provide a water/oil repellent composition whereby it is possible to obtain an article which is excellent in each of water repellency, oil repellency and heavy rain durability, a method for its production, and an article which is excellent in each of water repellency, oil repellency, heavy rain durability and texture. The water/oil repellent composition comprises a copolymer containing structural units based on a monomer (a), structural units based on a monomer (b) and structural units based on a monomer (c). Here, the monomer (a) is a compound represented by (Z—Y)nX (wherein Z is a C1-6perfluoroalkyl group, etc.; Y is a bivalent organic group, etc.; n is 1 or 2; and X is a polymerizable unsaturated group). The monomer (b) is a (meth)acrylate having no polyfluoroalkyl group and having an alkyl group with at least 12 carbon atoms. The monomer (c) is a monomer having a poly(oxypolyfluoroalkylene) chain.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: August 13, 2019
    Assignee: AGC Inc.
    Inventors: Akira Isobe, Minako Shimada, Yuuichi Oomori
  • Patent number: 10324234
    Abstract: The present invention provides a substrate with an antireflection layer not only which is excellent in the antireflection properties but also which has high water repellency and oil repellency and favorable oil and fat stain removability, and a display device provided with a substrate with an antireflection layer. A substrate with an antireflection layer, which comprises an antireflection layer on at least one surface of the substrate, wherein the antireflection layer contains a silica porous film having fluorinated organic groups, and the surface of the antireflection layer on the opposite side from the substrate has an element number ratio F/Si of at least 1 as obtained from the peak height of F1s and the peak height of Si2p in surface analysis by scanning X-ray photoelectron spectroscopy (ESCA) and has an arithmetic mean roughness (Sa) of at most 3.0 nm.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: June 18, 2019
    Assignee: AGC Inc.
    Inventors: Kenji Ishizeki, Akira Isobe, Yuki Hatanaka, Yohei Kawai, Takashige Yoneda, Keisuke Abe
  • Patent number: 10233331
    Abstract: To provide a fluorinated ether composition useful for surface treatment to impart water/oil repellency to the surface of a substrate, a method for producing the fluorinated ether composition, and a coating liquid containing the fluorinated ether composition, as well as a substrate having a surface-treated layer, and a method for producing the same. Said composition comprises at least two fluorinated ether compounds which are represented by A-O-Q-(CbF2bO)d—X—O—B10 and which are different in B10. X is a divalent organic group having no CF2O. B10 is —CH2CH2CH2SiLmRn, —CH2CH(SiLmRn)CH3, —CH2CH?CH2 or —CH?CHCH3. A is a perfluoroalkyl group or group B10. Of the total of group B10 in said composition, the proportion of —CH2CH2CH2SiLmRn is from 90 to 99 mol %, and the proportion of —CH?CHCH3 is from 1 to 10 mol %. L is a hydrolyzable group, and R is a monovalent hydrocarbon group. b is an integer of from 1 to 10, and d is an integer of from 1 to 200.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: March 19, 2019
    Assignee: AGC Inc.
    Inventors: Taiki Hoshino, Eisuke Murotani, Akira Isobe
  • Publication number: 20180148606
    Abstract: To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid that are able to form a surface layer which is excellent in water/oil repellency, abrasion resistance, fingerprint stain removability, lubricity and outer appearance, and an article having such a surface layer. A fluorinated ether compound represented by A1—O—(Rf1O)m1-Q1-[C(O)N(R1)]p1—R11—C[—R12—SiR13n1X13?n1]3, wherein A1 is a C1-20 perfluoroalkyl group; Rf1 is a fluoroalkylene group having no branched structure; m1 is an integer from 2 to 210; Q1 is a single bond or a fluoroalkylene group having no branched structure; R1 is a hydrogen atom, etc.; p1 is 0 or 1; R11 is a single bond, an alkylene group, etc.; R12 is an alkylene group, etc.; R13 is a monovalent hydrocarbon group, etc.; X1 is a hydrolyzable group; and n1 is an integer of from 0 to 2.
    Type: Application
    Filed: January 23, 2018
    Publication date: May 31, 2018
    Applicant: Asahi Glass Company, Limited
    Inventors: Taiki Hoshino, Kiyotaka Takao, Kazue Toda, Kenji Ishizeki, Akira Isobe