Electrode-separated piezoelectric crystal oscillator and method

Details Electrode-separated piezoelectric crystal oscillator and method Electrode-separated piezoelectric crystal oscillator and method

1992-02-07

1993-08-10

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

73 1903, H01L 4108

Patent

active

052352382

ABSTRACT:
Herein disclosed is a device for determining the concentration of a substance in a solution by making use of a quartz oscillator. In the device, at least one of a plurality of electrodes for applying an electrical voltage to a crystal wafer is separated from the crystal wafer, and the space between the separated electrode and the crystal wafer is filled with a conductive substance. The electrode-separated piezoelectric crystal oscillator thus obtained can be made more highly accurate, smaller-sized and more inexpensive.

REFERENCES:
patent: 1860529 (1932-05-01), Cady
patent: 4666547 (1987-05-01), Snowden et al.
patent: 4789804 (1988-12-01), Karube et al.
"Handbook of Piezoelectric Crystals" by J.Buchanan, Philco for Wright Air Dev. Ctr., Dec. 1954.
"Analytical Uses of Piezoelectric Crystals: A Review," by G. Guilbault et al., 1988.
"A Quartz Plate with Coupled Liquid Column as a Variable Resonator" by F. Fox et al. Proceedings of I.R.E., Jan. 1942.

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