Patents by Inventor Chaiyasit KUMTORNKITTIKUL

Chaiyasit KUMTORNKITTIKUL 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).

  • OPTICAL SEMICONDUCTOR DEVICE AND METHOD FOR FABRICATING THE SAME
    Publication number: 20090085056
    Abstract: According to an aspect of the present invention, there is provided an optical semiconductor device, comprising, a first AlN clad-layer, a first nitride semiconductor guide-layer formed on the first AlN clad-layer, refractive index of the first nitride semiconductor guide-layer being larger than refractive index of the first AlN clad-layer, a nitride semiconductor core-layer formed on the first nitride semiconductor guide-layer, refractive index of the nitride semiconductor core-layer being larger than refractive index of the first AlN clad-layer and smaller than refractive index of the first nitride semiconductor guide-layer, a second nitride semiconductor guide-layer formed on the nitride semiconductor core-layer, refractive index of the second nitride semiconductor guide-layer being larger than refractive index of the nitride semiconductor core-layer, a second AlN clad-layer formed on the second nitride semiconductor guide-layer.
    Type: Application
    Filed: July 31, 2008
    Publication date: April 2, 2009
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Chaiyasit KUMTORNKITTIKUL