Patents Represented by Attorney, Agent or Law Firm Keating R. Bennett, LLP
  • Patent number: 6208063
    Abstract: A surface acoustic wave device includes a piezoelectric substrate, and an interdigital transducer provided on the piezoelectric substrate, wherein the piezoelectric substrate includes at least two piezoelectric ceramic layers made of a polycrystalline material. The at least two piezoelectric ceramic layers are stacked so that electrical characteristics and mechanical characteristics thereof vary in a direction that is substantially perpendicular a surface of the piezoelectric substrate upon which the at least two ceramic piezoelectric layers are stacked.
    Type: Grant
    Filed: November 3, 1999
    Date of Patent: March 27, 2001
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Katsuhiro Horikawa, Akira Ando