Patents by Inventor Kiho Yamada

Kiho Yamada 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).

  • NITRIDE SEMICONDUCTOR ULTRAVIOLET LIGHT EMITTING DEVICE AND METHOD FOR MANUFACTURING SAME
    Publication number: 20200321491
    Abstract: Provided is an ultraviolet light emitting device having high quality and high reliability that prevents deterioration in electrical characteristics caused by a photochemical reaction of a non-bonding amorphous fluororesin, decomposition or the like of the amorphous fluororesin, and peeling off of the amorphous fluororesin. A nitride semiconductor ultraviolet light emitting device 1 includes a base 30, a nitride semiconductor ultraviolet light emitting element flip-chip mounted on the base 30, and an amorphous fluororesin 40 that is in direct contact with the nitride semiconductor ultraviolet light emitting element for covering. The nitride semiconductor ultraviolet light emitting element includes a sapphire substrate 11, a plurality of AlGaN-based semiconductor layers 12 laminated on the main surface of the sapphire substrate 11, an n-electrode 13, and a p-electrode 14.
    Type: Application
    Filed: February 27, 2017
    Publication date: October 8, 2020
    Applicants: Soko Kagaku Co., Ltd., AGC INC.
    Inventors: Akira HIRANO, Kiho YAMADA, Ko AOSAKI
  • ULTRAVIOLET LIGHT EMITTING DEVICE AND METHOD FOR MANUFACTURING SAME
    Publication number: 20190148589
    Abstract: Provided is an ultraviolet light emitting device that prevents peeled off of a non-bonding amorphous fluororesin and has high quality and high reliability.
    Type: Application
    Filed: April 10, 2017
    Publication date: May 16, 2019
    Applicants: Soko Kagaku Co., Ltd., AGC INC.
    Inventors: Kiho YAMADA, Yosuke NAGASAWA, Akira HIRANO, Masamichi IPPOMMATSU, Ko AOSAKI
  • Ultraviolet light emitting device
    Patent number: 9972758
    Abstract: An ultraviolet light emitting device having high quality and high reliability is provided by preventing deterioration of electrical characteristics which is associated with an ultraviolet light emission operation and caused by a sealing resin.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: May 15, 2018
    Assignee: SOKO KAGAKU CO., LTD.
    Inventors: Kiho Yamada, Shoko Nagai, Yuta Furusawa, Akira Hirano, Masamichi Ippommatsu
  • Ultraviolet light emitting device using metal non-bondable amorphous fluororesin molding compound
    Patent number: 9450157
    Abstract: An ultraviolet light emitting device having high quality and high reliability is provided by preventing deterioration of electrical characteristics which is associated with an ultraviolet light emission operation and caused by a sealing resin. The ultraviolet light emitting device is an ultraviolet light emitting device including: an ultraviolet light emitting element (2) formed of a nitride semiconductor; and an ultraviolet-transparent sealing resin (3) covering the ultraviolet light emitting element (2), wherein at least a specific portion (3a) of the sealing resin (3), which is in contact with pad electrodes (18) and (17) of the ultraviolet light emitting element (2), is a first type amorphous fluororesin, and a terminal functional group of a polymer or a copolymer that forms the first type amorphous fluororesin is a nonreactive terminal functional group which is not bondable to a metal that forms the pad electrodes (16) and (17).
    Type: Grant
    Filed: April 17, 2014
    Date of Patent: September 20, 2016
    Assignees: SOKO KAGAKU CO., LTD., ASAHI GLASS COMPANY, LIMITED
    Inventors: Kiho Yamada, Shoko Nagai, Yuta Furusawa, Akira Hirano, Masamichi Ippommatsu, Ko Aosaki, Naoki Morishima
  • ULTRAVIOLET LIGHT EMITTING DEVICE
    Publication number: 20160218259
    Abstract: An ultraviolet light emitting device having high quality and high reliability is provided by preventing deterioration of electrical characteristics which is associated with an ultraviolet light emission operation and caused by a sealing resin.
    Type: Application
    Filed: September 10, 2014
    Publication date: July 28, 2016
    Applicant: Soko Kagaku. Co., Ltd.
    Inventors: Kiho Yamada, Shoko Nagai, Yuta Furusawa, Akira Hirano, Masamichi Ippommatsu
  • ULTRAVIOLET LIGHT EMITTING DEVICE
    Publication number: 20150243856
    Abstract: An ultraviolet light emitting device having high quality and high reliability is provided by preventing deterioration of electrical characteristics which is associated with an ultraviolet light emission operation and caused by a sealing resin. The ultraviolet light emitting device is an ultraviolet light emitting device including: an ultraviolet light emitting element (2) formed of a nitride semiconductor; and an ultraviolet-transparent sealing resin (3) covering the ultraviolet light emitting element (2), wherein at least a specific portion (3a) of the sealing resin (3), which is in contact with pad electrodes (18) and (17) of the ultraviolet light emitting element (2), is a first type amorphous fluororesin, and a terminal functional group of a polymer or a copolymer that forms the first type amorphous fluororesin is a nonreactive terminal functional group which is not bondable to a metal that forms the pad electrodes (16) and (17).
    Type: Application
    Filed: April 17, 2014
    Publication date: August 27, 2015
    Applicants: Asahi Glass Company, Limited, Soko Kagaku Co., Ltd
    Inventors: Kiho Yamada, Shoko Nagai, Yuta Furusawa, Akira Hirano, Masamichi Ippommatsu, Ko Aosaki, Naoki Morishima