Patents by Inventor Massashi Watanabe

Massashi Watanabe 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 laser device
    Publication number: 20060013275
    Abstract: A semiconductor laser device 1 has, arranged inside an airtight-sealed package 2, a semiconductor laser element 3 having an active region made of one material selected from the group consisting of an AlGaAs-based crystal, an AlGaInP-based crystal, an AlGaN-based crystal, and an InGaN-based crystal. The atmospheric gas inside the package 2 contains oxygen. The semiconductor laser element 3 has a dielectric oxide film formed on the laser emission surface thereof. The atmospheric gas is a mixture of oxygen and nitrogen, with an oxygen content of 20% or more.
    Type: Application
    Filed: April 23, 2004
    Publication date: January 19, 2006
    Inventors: Massashi Watanabe, Shoji Honda, Yasuhiro Iwamura, Gen Shimizu, Tetsuro Inoue