Patents Examined by Barbara Simmons
  • Surface acoustic wave resonator, surface acoustic wave device, and communication device using shear horizontal waves
    Patent number: 6437668
    Abstract: A surface acoustic wave resonator includes a piezoelectric substrate and an interdigital transducer disposed on the piezoelectric substrate and made of a metal or an alloy having a higher specific weight than that of the piezoelectric material of the piezoelectric substrate so as to generate shear horizontal waves. The interdigital transducer includes a plurality of electrode fingers. A ratio of the electrode finger width relative to the electrode finger width plus the space between adjacent electrode fingers is about 0.55 to about 0.85.
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: August 20, 2002
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takeshi Nakao, Toshimaro Yoneda, Koji Fujimoto, Michio Kadota