Patents by Inventor Shiro Yamakazi

Shiro Yamakazi 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).

  • Light-emitting device using group III nitride group compound semiconductor
    Publication number: 20010002048
    Abstract: A light-emitting semiconductor device provides an active layer which comprises thirteen (13) layers that includes six (6) pairs of quantum barrier layers made of Al0.95In0.05N and quantum well layers made of Al0.70In0 30N, which are laminated together alternately. The semiconductor device may also comprise a quantum well layer having a high composition ratio of indium (In). Forming the quantum barrier layer and the quantum well layer to have a high composition ratio of indium (In) increases the lattice constant of the active layer of the semiconductor device.
    Type: Application
    Filed: January 17, 2001
    Publication date: May 31, 2001
    Inventors: Masayoshi Koike, Shiro Yamakazi, Akira Kojima