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Longitudinal quartz crystal resonator

  • US 5,001,383 A
  • Filed: 09/07/1989
  • Issued: 03/19/1991
  • Est. Priority Date: 09/09/1988
  • Status: Expired due to Fees
First Claim
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1. A longitudinal quartz crystal resonator comprising:

  • a vibrational portion having a longitudinal shape and a pair of opposed widthwise side sections;

    a pair of bridge portions connected to the respective widthwise side sections of the vibrational portion; and

    a supporting portion connected to the bridge portions to support the vibrational portion and formed integrally with the vibrational and bridge portions by etching, the supporting portion comprising a pair of flexural sections connected to respective ones of the bridge portions, each flexural section being connected to an opposed connecting section and defining therewith an opening surrounded by the flexural and connecting sections, a pair of frame sections connected to respective ones of the connecting sections, and a mounting section connected to the pair of frame sections;

    wherein the widthwise side sections of the vibrational portion extended substantially perpendicular to the X-axis of the resonator, and driving electrodes disposed on the widthwise side sections.

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