Patents by Inventor Yoshikazu Kondo

Yoshikazu Kondo 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: 20240077901
    Abstract: A reference voltage generation circuit includes a Zener diode and a current generation circuit connected to the Zener diode in parallel. The current generation circuit includes a resistance voltage divider circuit, a transistor circuit and a voltage control circuit. The resistance voltage divider circuit has a branch portion for branching the current into two paths, and outputs a reference voltage acquired by voltage division through a resistive element. The transistor circuit includes two NPN transistors and a series resistance circuit in which resistive elements are connected in series. The two NPN transistors respectively having collectors, bases and emitters. The collectors are respectively connected to the two paths. The bases have a common connection. The series resistance circuit is connected between a ground and one of the emitters. The voltage control circuit equalizes respective collector potentials of the two NPN transistors.
    Type: Application
    Filed: September 1, 2023
    Publication date: March 7, 2024
    Inventors: Masaya KONDO, Yoshikazu FURUTA, Tomohiro NEZUKA
  • Publication number: 20230094094
    Abstract: A method of fabricating a semiconductor device includes providing a GaN substrate with an epitaxial layer formed thereover, the epitaxial layer forming a heterojunction with the GaN substrate, the heterojunction supporting a 2-dimensional electron gas (2DEG) channel in the GaN substrate. A composite surface passivation layer is formed over a top surface of the epitaxial layer, wherein the composite surface passivation layer comprises a first passivation layer portion formed proximate to a first region of the GaN device and a second passivation layer portion formed proximate to a second region of the GaN device. The first and second passivation layer portions are disposed laterally adjacent to each other over the epitaxial layer, wherein the first passivation layer portion is formed in a first process and the second passivation layer portion is formed in a second process.
    Type: Application
    Filed: September 30, 2021
    Publication date: March 30, 2023
    Inventors: Dong Seup Lee, Jungwoo Joh, Yoshikazu Kondo
  • Publication number: 20210389184
    Abstract: A light receiving device includes a plurality of photoelectric conversion element units 10A1, 10A2, 10A3, and 10A4 each composed of four types of photoelectric conversion elements including four types of polarization elements 501, 502, 503, and 504 and further includes a polarized component measurement unit 91 and a polarized component calculation unit 92, wherein the polarized component measurement unit 91 obtains, for example, a first polarized component and a third polarized component on the basis of output signals from a first photoelectric conversion element and a third photoelectric conversion element, and the polarized component calculation unit 92 calculates, for example, polarized components of a third polarization azimuth and a first polarization azimuth in the first polarized component and the third polarized component on the basis of the obtained third polarized component and the first polarized component.
    Type: Application
    Filed: September 20, 2019
    Publication date: December 16, 2021
    Inventor: Yoshikazu KONDO
  • Patent number: 10707323
    Abstract: Metal contact openings are etched in the barrier layer of a group III-N HEMT with a first gas combination that etches down into the barrier layer, and a second gas combination that etches further down into the barrier layer to a depth that lies above the top surface of a channel layer that touches and lies below the barrier layer.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: July 7, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Yoshikazu Kondo, Shoji Wada, Hiroshi Yamasaki, Masahiro Iwamoto
  • Publication number: 20190288090
    Abstract: Metal contact openings are etched in the barrier layer of a group III-N HEMT with a first gas combination that etches down into the barrier layer, and a second gas combination that etches further down into the barrier layer to a depth that lies above the top surface of a channel layer that touches and lies below the barrier layer.
    Type: Application
    Filed: May 23, 2019
    Publication date: September 19, 2019
    Inventors: Yoshikazu Kondo, Shoji Wada, Hiroshi Yamasaki, Masahiro Iwamoto
  • Patent number: 10374057
    Abstract: Metal contact openings are etched in the barrier layer of a group III-N HEMT with a first gas combination that etches down into the barrier layer, and a second gas combination that etches further down into the barrier layer to a depth that lies above the top surface of a channel layer that touches and lies below the barrier layer.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: August 6, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Yoshikazu Kondo, Shoji Wada, Hiroshi Yamasaki, Masahiro Iwamoto
  • Patent number: 10312095
    Abstract: An electronic device, that in various embodiments includes a first semiconductor layer comprising a first group III nitride. A second semiconductor layer is located directly on the first semiconductor layer and comprises a second different group III nitride. A cap layer comprising the first group III nitride is located directly on the second semiconductor layer. A dielectric layer is located over the cap layer and directly contacts the second semiconductor layer through an opening in the cap layer.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: June 4, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Dong Seup Lee, Yoshikazu Kondo, Pinghai Hao, Sameer Pendharkar
  • Publication number: 20190157091
    Abstract: An electronic device, that in various embodiments includes a first semiconductor layer comprising a first group III nitride. A second semiconductor layer is located directly on the first semiconductor layer and comprises a second different group III nitride. A cap layer comprising the first group III nitride is located directly on the second semiconductor layer. A dielectric layer is located over the cap layer and directly contacts the second semiconductor layer through an opening in the cap layer.
    Type: Application
    Filed: October 18, 2018
    Publication date: May 23, 2019
    Inventors: Dong Seup LEE, Yoshikazu KONDO, Pinghai HAO, Sameer PENDHARKAR
  • Patent number: 10134596
    Abstract: In some embodiments, an apparatus includes a first layer with a first surface and a second surface opposite to the first surface. The apparatus also includes a second layer having a third surface interfacing the second surface and a fourth surface opposite the third surface. The apparatus further includes a third layer having a fifth surface interfacing the fourth surface and a sixth surface opposite the fifth surface. The apparatus also includes a fourth layer having a seventh surface interfacing the sixth surface to form a heterojunction, which generates a two-dimensional electron gas channel formed in the fourth layer. Further, the apparatus includes a recess that extends from the first surface to the fifth surface.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: November 20, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Dong Seup Lee, Yoshikazu Kondo, Pinghai Hao, Sameer Pendharkar
  • Patent number: 10018377
    Abstract: A solar light (heat) absorption material which has an excellent solar light (heat) absorbing ability and a simple structure, and may be used as a low-cost and high-performance heat absorption/accumulation material. Also, a solar light (heat) absorption/control building component including the solar light (heat) absorption material that allows for easy change of its solar light (heat) absorption/control ability. The material includes particles dispersed into a liquid medium having a specific heat ranging from 0.4 to 1.4 cal/g/° C. and a melting point of 5° C. or lower. The dispersed particles have L*value of 30 or less as determined by the CIE-Lab color system (light source D65).
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: July 10, 2018
    Assignees: University of the Ryukyus, Osaka Gas Co., Ltd.
    Inventors: Yoshikazu Kondo, Masami Ueno, Yoshinobu Kawamitsu, Junichiro Tsutsumi
  • Publication number: 20180033865
    Abstract: Metal contact openings are etched in the barrier layer of a group III-N HEMT with a first gas combination that etches down into the barrier layer, and a second gas combination that etches further down into the barrier layer to a depth that lies above the top surface of a channel layer that touches and lies below the barrier layer.
    Type: Application
    Filed: October 12, 2017
    Publication date: February 1, 2018
    Inventors: Yoshikazu Kondo, Shoji Wada, Hiroshi Yamasaki, Masahiro Iwamoto
  • Patent number: 9818839
    Abstract: Metal contact openings are etched in the barrier layer of a group III-N HEMT with a first gas combination that etches down into the barrier layer, and a second gas combination that etches further down into the barrier layer to a depth that lies above the top surface of a channel layer that touches and lies below the barrier layer.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: November 14, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Yoshikazu Kondo, Shoji Wada, Hiroshi Yamasaki, Masahiro Iwamoto
  • Publication number: 20160351685
    Abstract: Metal contact openings are etched in the barrier layer of a group III-N HEMT with a first gas combination that etches down into the barrier layer, and a second gas combination that etches further down into the barrier layer to a depth that lies above the top surface of a channel layer that touches and lies below the barrier layer.
    Type: Application
    Filed: August 15, 2016
    Publication date: December 1, 2016
    Inventors: Yoshikazu Kondo, Shoji Wada, Hiroshi Yamasaki, Masahiro Iwamoto
  • Patent number: 9443737
    Abstract: Metal contact openings are etched in the barrier layer of a group III-N HEMT with a first gas combination that etches down into the barrier layer, and a second gas combination that etches further down into the barrier layer to a depth that lies above the top surface of a channel layer that touches and lies below the barrier layer.
    Type: Grant
    Filed: April 3, 2013
    Date of Patent: September 13, 2016
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Yoshikazu Kondo, Shoji Wada, Hiroshi Yamasaki, Masahiro Iwamoto
  • Publication number: 20140352237
    Abstract: A solar light (heat) absorption material which has an excellent solar light (heat) absorbing ability and a simple structure, and may be used as a low-cost and high-performance heat absorption/accumulation material. Also, a solar light (heat) absorption/control building component including the solar light (heat) absorption material that allows for easy change of its solar light (heat) absorption/control ability. The material includes particles dispersed into a liquid medium having a specific heat ranging from 0.4 to 1.4 cal/g/° C. and a melting point of 5° C. or lower. The dispersed particles have L*value of 30 or less as determined by the CIE-Lab color system (light source D65).
    Type: Application
    Filed: August 20, 2014
    Publication date: December 4, 2014
    Inventors: Yoshikazu Kondo, Masami Ueno, Yoshinobu Kawamitsu, Junichiro Tsutsumi
  • Publication number: 20140302673
    Abstract: Metal contacts with low contact resistances are formed in a group III-N HEMT by forming metal contact openings in the barrier layer of the group III-N HEMT to have depths that correspond to low contact resistances. The metal contact openings are etched in the barrier layer with a first gas combination that etches down into the barrier layer, and a second gas combination that etches further down into the barrier layer.
    Type: Application
    Filed: April 3, 2013
    Publication date: October 9, 2014
    Applicant: Texas Instruments Incorporated
    Inventors: Yoshikazu Kondo, Shoji Wada, Hiroshi Yamasaki, Masahiro Iwamoto
  • Publication number: 20140302672
    Abstract: Metal contact openings are etched in the barrier layer of a group III-N HEMT with a first gas combination that etches down into the barrier layer, and a second gas combination that etches further down into the barrier layer to a depth that lies above the top surface of a channel layer that touches and lies below the barrier layer.
    Type: Application
    Filed: April 3, 2013
    Publication date: October 9, 2014
    Applicant: Texas Instruments Incorporated
    Inventors: Yoshikazu Kondo, Shoji Wada, Hiroshi Yamasaki, Masahiro Iwamoto
  • Patent number: 8354479
    Abstract: The present invention provides a functional filler which is excellent in dispersibility or interaction with polylactic acid as a matrix polymer and can improve heat resistance, moldability and mechanical strength of the polylactic acid; and a resin composition containing the functional filler. The functional filler of the present invention is characterized in including a raw material filler and polylactic acid, wherein a surface or end the raw material filler is modified by the polylactic acid.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: January 15, 2013
    Assignee: Dai-ichi Kogyo Seiyaku Co., Ltd.
    Inventors: Masahiro Satoh, Fengzhe Jin, Yoshikazu Kondo
  • Publication number: 20120017622
    Abstract: A solar light (heat) absorption material is provided which has an excellent solar light (heat) absorbing ability and a simple structure, and may be usable as a low-cost and high-performance heat absorption/accumulation material, the inventive material being usable also as a solar light (heat) absorption/control building component that allows easy change of its solar light (heat) absorption/control ability. The material comprises particles dispersed into a liquid medium having a specific heat ranging from 0.4 to 1.4 cal/g/° C. and a melting point of 5° C. or lower. The dispersed particles have L*value of 30 or less as determined by the CIE-Lab color system (light source D65).
    Type: Application
    Filed: March 5, 2010
    Publication date: January 26, 2012
    Applicants: OSAKA GAS CO., LTD., UNIVERSITY OF THE RYUKYUS
    Inventors: Yoshikazu Kondo, Masami Ueno, Yoshinobu Kawamitsu, Junichiro Tsutsumi
  • Patent number: 8045109
    Abstract: Provided are a method of manufacturing liquid crystal display device possessing transparent conductive layer exhibiting excellent optical transparency, resistance characteristic, evenness, adhesion to substrate, and hardness, and liquid crystal display device thereof.
    Type: Grant
    Filed: July 17, 2007
    Date of Patent: October 25, 2011
    Assignee: Konica Minolta Holdings, Inc.
    Inventors: Yoshikazu Kondo, Yoshiro Toda, Wataru Mizuno