Quartz crystal vibrator

Details Quartz crystal vibrator Quartz crystal vibrator

1977-10-31

1979-10-30

Esposito, Michael F.

Coating processes

Electrical product produced

Piezoelectric properties

427124, 427248R, 427250, 427282, 427284, 29 2535, H01L 4104, B05D 132

Patent

active

041729080

ABSTRACT:
A flexural mode tuning fork quartz crystal vibrator having two vibrator tines including first and second opposed substantially planar surfaces, the thickness of the plate between said opposed surfaces being no greater than 0.2 mm is provided. Both surfaces of each tine have three electrodes on at least the lengthwise peripheral sides of the respective surfaces of the tines and a third electrode intermediate and not in contact with the two peripherally disposed electrodes with each intermediate electrode being short-circuited to the peripheral electrode on the other tine. A fourth electrode is disposed on at least one lengthwise side edge of both of the respective tines, the fourth electrode electrically coupling the peripherally disposed electrode on the lengthwise peripheral sides of the respective surfaces of the tine.

REFERENCES:
patent: 2639392 (1953-05-01), Warner, Jr.
patent: 2856313 (1958-10-01), Gerber et al.
patent: 3760471 (1973-09-01), Borner
patent: 3864161 (1975-02-01), Thompson
patent: 4006435 (1977-01-01), Kerbel

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