Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1978-06-19
1981-03-31
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
H01L 4110
Patent
active
042596076
ABSTRACT:
A structure of an electrode film deposited on a tuning fork-type quartz crystal vibrator in which an electrode film on a tuning fork-type quartz crystal vibrator has a laminated structure obtained by forming, in the order mentioned, three overlapping layers, namely layers of chrome, nickel and silver, or two overlapping layers, namely layers of nickel and silver, on the surface of a tuning fork-shaped quartz crystal from the side nearest thereto, and in which the thickness of each layer of the electrode film is less than 300 A for the chrome layer, less than 500 A for the nickel layer, and less than 2000 A for the silver layer.
REFERENCES:
patent: 2641718 (1953-06-01), Samuelson
patent: 3317762 (1967-05-01), Corwin et al.
patent: 3481014 (1969-12-01), Noren
patent: 3831043 (1974-08-01), Hoffmann et al.
patent: 3891873 (1975-06-01), Yanagisawa et al.
patent: 4080696 (1978-03-01), Shimatsu
Piezoelectric Ceramics, by Jaffe, Cook & Jaffe, Academic Press, N.Y., 1971, pp. 262-263.
Kohyama Fumio
Noguchi Kazuo
Wakasugi Makoto
Budd Mark O.
Citizen Watch Co. Ltd.
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