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Frequency adjusting a piezoelectric device by lasering

  • US 4,131,484 A
  • Filed: 02/13/1978
  • Issued: 12/26/1978
  • Est. Priority Date: 02/13/1978
  • Status: Expired due to Term
First Claim
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1. A method of adjusting the resonant frequency of a piezoelectric device, which comprises:

  • laser machining electrode material from the piezoelectric device to change the resonant frequency of the device to a nominal value; and

    simultaneously electronically cleaning the piezoelectric device by overdriving the device at a high current level in comparison to the current level at which the device normally is operated, to prevent lasered particles which cause electrical instability of the device in subsequent operation from accumulating on the device.

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