Patents by Inventor Yukio Ohkubo

Yukio Ohkubo 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).

  • Surface acoustic wave device with an electrode insulating film and method for fabricating the same
    Patent number: 5923231
    Abstract: In a surface acoustic wave device for processing signals of relatively high frequencies, as of above 1 GHz, by the use of surface acoustic waves which propagate on the surface of a piezoelectric substrate, radiating bulk waves in the direction of depth of the piezoelectric substrate, an IDT structure is provided, which does not increase propagation loss and has sufficiently low electric resistance. The device comprises a piezoelectric substrate 10, and an electrode of a conducting film 12 for exciting, receiving, reflecting and/or propagating surface acoustic waves, and the surface acoustic waves propagate on the surface of the piezoelectric substrate, radiating at least one transverse component of bulk waves in the direction of depth of the piezoelectric substrate 10.
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: July 13, 1999
    Assignee: Kinseki Limited
    Inventors: Yukio Ohkubo, Takahiro Sato