Crystal package for a high-G environment

Details Crystal package for a high-G environment Crystal package for a high-G environment

1982-08-26

1984-09-11

Miller, J. D.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310348, 357 26, H01L 4108

Patent

active

044712596

ABSTRACT:
A shock-resistant low profile crystal package and internal crystal mounting apparatus capable of adequately protecting a multi-electrode crystal plate from high-G forces occasionally experienced by the mishandling of the particular article in which the component has been mounted. The crystal plate is positioned within an aperture of the base member and is supported about its edge during wire-bonding of the electrode pattern to the terminal connecting pins of the base member. Since the crystal plate is free-floating about its central position, the crystal can undergo thin film metallization of an electrode pattern from either side of the crystal plate to achieve desired frequency parameters. A ceramic retaining ring is placed on top of the crystal plate and the overall package is hermetically sealed by the welding of a cover to each end thereof. The base member of the crystal package is manufactured from a ceramic material which will enable the assembled crystal package to be mounted to hybrid substrate circuit boards or similar modules.

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"Ceramic Flat Pack Enclosures for Precision Quartz Crystal Units" by R. Donald Peters, of General Electric Co., p. 224.
"A New Ceramic Flat Pack for Quartz Resonators" by P. D. Wilcox and G. S. Snow, of Sandia Labs., Albuquerque, NM.
"Quartz Crystal Units for High G Environment" by Marvin Bernstein, of Electronic Components Laboratory, U.S. Army Electronics Command.
Buchanan, J., "Handbook of Piezoelectric Crystals," Philco, for Wright Air Development Ctr., Dec. 1954, pp. 53-58.

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