Miniature quartz resonator force transducer
Electrode for tuning fork type quartz crystal vibrator
Multiple mode piezoelectric resonator
Microresonator of tuning fork configuration operating at its second overtone frequency Patent #: 4415827
ApplicationNo. 06/498768 filed on 05/27/1983
US Classes:310/370, "U" or "tuning fork" shape310/367Piezoelectric element shape
ExaminersPrimary: Miller, J. D.
Assistant: Rebsch, D. L.
Attorney, Agent or Firm
International ClassesH03H 9/00 (20060101)
H03H 9/215 (20060101)
AbstractIn a quartz crystal microresonator of the type including first and second stem portions, a pair of integral tines extending between the stem portions, a slot between the tines, the slot having opposed crotches where the tines join the stem portions, and a plurality of electrodes mounted on each of the tines, spaced along the lengths thereof, the electrodes being adapted for receipt of an AC voltage for causing the tines to oscillate, there are disclosed several different electrode configurations to optimize resonator performance when operating in the fundamental and first and second overtone flexure modes. The electrodes change polarity along the length of the tines at points where the second derivative of displacement changes polarity.