Method of making a quartz crystal oscillator

Details Method of making a quartz crystal oscillator Method of making a quartz crystal oscillator

1978-12-05

1981-10-13

Hall, Carl E.

Metal working

Piezoelectric device making

228121, 228198, 310344, 310370, H01L 4122

Patent

active

042939860

ABSTRACT:
A quartz crystal oscillator package comprising a quartz crystal vibrator leaf enclosed in an evacuated housing. The vibrator leaf frame is sandwiched and sealed between a pair of housing elements formed by etching at one time the periphery of each housing element and at another time etching a concave portion in each housing element. Opposed concave portions provide the internal volume wherein the vibrator leaf is sealed under vacuum. Using heat and vacuum, a metal film deposited on the sealing surfaces of the housing elements fuses with a binder material to form a eutectic alloy seal. A flat package having small size, high structural strength, an excellent hermetic seal, and high internal vacuum is produced by this method.

REFERENCES:
patent: 3857161 (1974-12-01), Hutchin
patent: 4077558 (1978-03-01), Carlson et al.
patent: 4135108 (1979-01-01), Besson

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