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Surface acoustic wave device

  • US 6,664,709 B2
  • Filed: 07/30/2001
  • Issued: 12/16/2003
  • Est. Priority Date: 08/09/2000
  • Status: Expired due to Fees
First Claim
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1. A surface acoustic wave device comprising:

  • a surface acoustic wave element; and

    a package containing the surface acoustic wave element, the package including a main body having an opening and a hollow space therein, a cover provided on the upper surface of the main body of the package and arranged to close the opening portion of the main body of the package, signal electrodes arranged to transmit a signal input from the outside of the package and a signal output from the surface acoustic wave element, and a grounding electrode for grounding an unwanted electromagnetic wave generated inside the package;

    wherein an insulating joining material is arranged to join the main body of the package and the cover, a metallized electrode which is located above the signal electrodes and is not in contact with the signal electrodes and is not in contact with the insulating joining material, the metallized electrode being provided at a fixed location of the main body of the package, and the metallized electrode is electrically connected to the grounding electrode.

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