Patents by Inventor Giichi Marutsuki

Giichi Marutsuki 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: 9490388
    Abstract: A method of fabricating a plurality of light emitting elements includes forming a nitride semiconductor layer on a growth substrate, the nitride semiconductor layer including at least an n-type nitride semiconductor layer, an active layer made of a nitride semiconductor, and a p-type nitride semiconductor layer stacked in this order; forming a p-electrode layer, the p-electrode layer including portions that correspond to the light emitting elements; forming a p-passivation layer that includes portions between the portions of the p-electrode layer formed on the upper surface of the nitride semiconductor layer; forming a seed layer on the p-electrode layer and the p-passivation layer; forming an insulating layer having portions formed on an upper surface of the seed layer; forming a plating layer on the seed layer; and forming a plating substrate by removing the insulating layer to form spaces between portions of the plating layer.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: November 8, 2016
    Assignee: NICHIA CORPORATION
    Inventors: Kentaro Watanabe, Giichi Marutsuki, Yuya Yamakami
  • Publication number: 20140295598
    Abstract: A method of fabricating a plurality of light emitting elements includes forming a nitride semiconductor layer on a growth substrate, the nitride semiconductor layer including at least an n-type nitride semiconductor layer, an active layer made of a nitride semiconductor, and a p-type nitride semiconductor layer stacked in this order; forming a p-electrode layer, the p-electrode layer including portions that correspond to the light emitting elements; forming a p-passivation layer that includes portions between the portions of the p-electrode layer formed on the upper surface of the nitride semiconductor layer; forming a seed layer on the p-electrode layer and the p-passivation layer; forming an insulating layer having portions formed on an upper surface of the seed layer; forming a plating layer on the seed layer; and forming a plating substrate by removing the insulating layer to form spaces between portions of the plating layer.
    Type: Application
    Filed: June 11, 2014
    Publication date: October 2, 2014
    Inventors: Kentaro WATANABE, Giichi MARUTSUKI, Yuya YAMAKAMI
  • Patent number: 8790945
    Abstract: A nitride semiconductor device includes a silicon substrate, a nitride semiconductor layer formed on the silicon substrate, and metal electrodes formed in contact with the silicon substrate. The metal electrodes has first metal layers which are formed in a shape of discrete islands and in contact with the silicon substrate, and second metal layers which are in contact with the silicon substrate exposed among the islands of the first metal layers and are formed to cover the first metal layers. Further, the second metal layers are made of a metal capable of forming ohmic contact with silicon, and the first metal layers are made of an alloy containing a metal and silicon, in which the metal is different than that in the second metal layer.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: July 29, 2014
    Assignee: Nichia Corporation
    Inventors: Kentaro Watanabe, Shunsuke Minato, Giichi Marutsuki
  • Patent number: 8786056
    Abstract: A method of forming a semiconductor light emitting element. The method can include forming a seed layer on a semiconductor layer assembly including at least one nitride semiconductor layer. An insulating mask can be formed on the seed layer. The insulating mask can include a plurality of element areas separated by cross spaces. Each element area of the plurality of element areas can be connected to at least one of the other element areas of the plurality of element areas. The seed layer can be plated such that a plating substrate is formed in each of the plurality of element areas.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: July 22, 2014
    Assignee: Nichia Corporation
    Inventors: Kentaro Watanabe, Giichi Marutsuki, Yuya Yamakami
  • Publication number: 20130072010
    Abstract: A nitride semiconductor device includes a silicon substrate, a nitride semiconductor layer formed on the silicon substrate, and metal electrodes formed in contact with the silicon substrate. The metal electrodes has first metal layers which are formed in a shape of discrete islands and in contact with the silicon substrate, and second metal layers which are in contact with the silicon substrate exposed among the islands of the first metal layers and are formed to cover the first metal layers. Further, the second metal layers are made of a metal capable of forming ohmic contact with silicon, and the first metal layers are made of an alloy containing a metal and silicon, in which the metal is different than that in the second metal layer.
    Type: Application
    Filed: September 28, 2012
    Publication date: March 21, 2013
    Applicant: NICHIA CORPORATION
    Inventors: Kentaro WATANABE, Shunsuke MINATO, Giichi MARUTSUKI
  • Patent number: 8299501
    Abstract: In the nitride semiconductor device using the silicon substrate, the metal electrode formed on the silicon substrate has both ohmic contact property and adhesion, so that the nitride semiconductor device having excellent electric properties and reliability is obtained. The nitride semiconductor device includes a silicon substrate (2), a nitride semiconductor layer (10) formed on the silicon substrate (2), and metal electrodes (8, 8?) formed in contact with the silicon substrate (2). The metal electrodes (8, 8?) has first metal layers (4, 4?) which are formed in a shape of discrete islands and in contact with the silicon substrate (2), and second metal layers (6, 6?) which are in contact with the silicon substrate (2) exposed among the islands of the first metal layers (4, 4?) and are formed to cover the first metal layers (4, 4?).
    Type: Grant
    Filed: May 29, 2008
    Date of Patent: October 30, 2012
    Assignee: Nichia Corporation
    Inventors: Kentaro Watanabe, Shunsuke Minato, Giichi Marutsuki
  • Publication number: 20110303894
    Abstract: A method of forming a semiconductor light emitting element. The method can include forming a seed layer on a semiconductor layer assembly including at least one nitride semiconductor layer. An insulating mask can be formed on the seed layer. The insulating mask can include a plurality of element areas separated by cross spaces. Each element area of the plurality of element areas can be connected to at least one of the other element areas of the plurality of element areas. The seed layer can be plated such that a plating substrate is formed in each of the plurality of element areas.
    Type: Application
    Filed: June 8, 2011
    Publication date: December 15, 2011
    Inventors: Kentaro Watanabe, Giichi Marutsuki, Yuya Yamakami
  • Publication number: 20080296627
    Abstract: In the nitride semiconductor device using the silicon substrate, the metal electrode formed on the silicon substrate has both ohmic contact property and adhesion, so that the nitride semiconductor device having excellent electric properties and reliability is obtained. The nitride semiconductor device includes a silicon substrate (2), a nitride semiconductor layer (10) formed on the silicon substrate (2), and metal electrodes (8, 8?) formed in contact with the silicon substrate (2). The metal electrodes (8, 8?) has first metal layers (4, 4?) which are formed in a shape of discrete islands and in contact with the silicon substrate (2), and second metal layers (6, 6?) which are in contact with the silicon substrate (2) exposed among the islands of the first metal layers (4, 4?) and are formed to cover the first metal layers (4, 4?).
    Type: Application
    Filed: May 29, 2008
    Publication date: December 4, 2008
    Inventors: Kentaro Watanabe, Shunsuke Minato, Giichi Marutsuki