Patents by Inventor Akihiko Yoshikawa

Akihiko Yoshikawa 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: 20080055718
    Abstract: The present invention provides a control method for a microscope apparatus, comprising: a first step for recognizing a type of a specimen retention member retaining a specimen; a second step for obtaining a first image including the whole image of a specimen retention member showing a picture of the entirety of the specimen retention member and an image of the specimen, and obtaining a second image including only the whole image of the specimen retention member in accordance with the type of the specimen retention member; and a third step for obtaining a macro observation image with a self fluorescence removed except for the specimen based on the first image and second image.
    Type: Application
    Filed: August 17, 2007
    Publication date: March 6, 2008
    Applicant: Olympus Corporation
    Inventors: Takayuki Kono, Akihiko Yoshikawa
  • Publication number: 20070091939
    Abstract: A microscope includes an illuminating unit that includes an excitation light source emitting an excitation light, and a phosphor receiving the excitation light and emitting illumination light in a specific wavelength range. The illuminating unit illuminates a specimen with the illumination light. The microscope also includes an observation unit for observing the specimen illuminated by the illuminating unit.
    Type: Application
    Filed: October 25, 2006
    Publication date: April 26, 2007
    Inventors: Akihiko Yoshikawa, Atsuhiro Tsuchiya, Masahiro Aoki
  • Patent number: 6856005
    Abstract: The object of the invention is to provide a semiconductor device having a nitride-based hetero-structure in which an epitaxial nitride film has a uniformly flat surface at a single molecule level, and a method of easily fabricating such a device. The object of the invention is achieved by providing a semiconductor device comprising a sapphire substrate whose c-surface is modified to be nitride-surfaced, GaN buffer layer, N polarity GaN layer, N polarity AlN layer, N polarity InN/InGaN multi-layered device structure, Al polarity AlN layer, and GaN cap layer.
    Type: Grant
    Filed: September 23, 2003
    Date of Patent: February 15, 2005
    Assignee: Chiba University
    Inventors: Akihiko Yoshikawa, Ke Xu
  • Publication number: 20040108500
    Abstract: The object of the invention is to provide a semiconductor device having a nitride-based hetero-structure in which an epitaxial nitride film has a uniformly flat surface at a single molecule level, and a method of easily fabricating such a device. The object of the invention is achieved by providing a semiconductor device comprising a sapphire substrate whose c-surface is modified to be nitride-surfaced, GaN buffer layer, N polarity GaN layer, N polarity AlN layer, N polarity InN/InGaN multi-layered device structure, Al polarity AlN layer, and GaN cap layer.
    Type: Application
    Filed: September 23, 2003
    Publication date: June 10, 2004
    Applicant: CHIBA UNIVERSITY
    Inventors: Akihiko Yoshikawa, Ke Xu