Patents by Inventor Mamoru KITSUKAWA

Mamoru KITSUKAWA 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).

  • Semiconductor light-emitting element, electrode structure and light-emitting device
    Patent number: 8884329
    Abstract: It is an object to improve joining properties of electrodes and reliability of the electrodes for supplying electrical power to a semiconductor. The semiconductor light-emitting element includes an n-type semiconductor layer, a light-emitting layer, a p-type semiconductor layer, a transparent conductive layer, a p-electrode formed on the transparent conductive layer and an n-electrode formed on the n-type semiconductor layer. The p-electrode includes a p-side second metal layer composed of a metallic material containing Au and provided to be exposed to the outside and a p-side first metal layer composed of a metallic material containing Au with hardness higher than that of the metallic material composing the p-side second metal layer, the p-side first metal layer being provided closer to the transparent conductive layer than the p-side second metal layer along the p-side second metal layer.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: November 11, 2014
    Assignee: Toyoda Gosei Co., Ltd.
    Inventors: Takehiko Okabe, Daisuke Hiraiwa, Mamoru Kitsukawa
  • SEMICONDUCTOR LIGHT-EMITTING ELEMENT, ELECTRODE STRUCTURE AND LIGHT-EMITTING DEVICE
    Publication number: 20120267673
    Abstract: It is an object to improve joining properties of electrodes and reliability of the electrodes for supplying electrical power to a semiconductor. The semiconductor light-emitting element includes an n-type semiconductor layer, a light-emitting layer, a p-type semiconductor layer, a transparent conductive layer, a p-electrode formed on the transparent conductive layer and an n-electrode formed on the n-type semiconductor layer. The p-electrode includes a p-side second metal layer composed of a metallic material containing Au and provided to be exposed to the outside and a p-side first metal layer composed of a metallic material containing Au with hardness higher than that of the metallic material composing the p-side second metal layer, the p-side first metal layer being provided closer to the transparent conductive layer than the p-side second metal layer along the p-side second metal layer.
    Type: Application
    Filed: April 19, 2012
    Publication date: October 25, 2012
    Applicant: SHOWA DENKO K.K.
    Inventors: Takehiko OKABE, Daisuke HIRAIWA, Mamoru KITSUKAWA