Circuit board for an electronic timepiece

Details Circuit board for an electronic timepiece Circuit board for an electronic timepiece

1976-07-30

1977-09-06

Schaefer, Robert K.

58 23TF, G04C 300

Patent

active

040459535

ABSTRACT:
A circuit board assembly for an electronic timepiece comprises a lower substrate having at least two recesses therein, an upper substrate superposed on the lower substrate and having at least two openings lying in registry with respective ones of the recesses, and a cover member superposed on the upper substrate hermetically covering the openings to thereby define at least two hermetically sealed compartments. An oscillator is housed in the one compartment and an IC chip housed in the other, both the oscillator and IC chip being electrically connected to electrodes printed on the upper face of the lower substrate. The compartment housing the oscillator is preferably maintained under vacuum and the compartment housing the IC chip is preferably maintained in an atmosphere of nitrogen gas or filled with resin material.

REFERENCES:
patent: 3757510 (1973-09-01), Dill
patent: 3766616 (1973-10-01), Staudte
patent: 3800523 (1974-04-01), Yamazaki
patent: 3842585 (1974-10-01), Zupoli
patent: 3909639 (1975-09-01), Kawai

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