Quartz crystal vibrator

Details Quartz crystal vibrator Quartz crystal vibrator

1981-11-05

1984-03-27

Miller, J. D.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310348, 310369, H01L 4122

Patent

active

044397062

ABSTRACT:
A quartz crystal vibrator has a vibrator element which includes a quartz crystal plate having obverse and reverse sides. A first excitation electrode is provided on the obverse side of the quartz crystal plate at the central portion thereof, and a first connecting electrode extends radially from the first excitation on the obverse side. A first supporting electrode is connected to the first connecting electrode and is provided fragmentarily along the entire circumference of the quartz crystal plate on the obverse side thereof. A second excitation electrode is provided on the reverse side of the quartz crystal plate at the central portion thereof at a position underlying the first excitation electrode, and a second connecting electrode extends radially from the second excitation electrode on the reverse side. A second supporting electrode is connected to the second connecting electrode and is provided fragmentarily over substantially all of a circular ring-like region located inwardly of the circumference of the quartz crystal plate on the reverse side, so as not to overlap the first supporting electrode. A first terminal pin is connected to the first supporting electrode at any point thereon, and a second terminal pin is connected to the second supporting electrode at any point thereon.

REFERENCES:
patent: 2440064 (1948-04-01), Arnold et al.
patent: 2802955 (1957-08-01), Kitterman
patent: 2933628 (1960-04-01), Samuelson
patent: 4112324 (1978-09-01), Yamaguchi et al.
patent: 4266157 (1981-05-01), Peters
Thompson, E. C., "Double Mount for Each Electrode of Crystal to Prevent Failure", Western Electric Technical Digest, No. 26, Apr. 1972.

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