Piezoelectric resonator element of cyrstallographic point...

Details Piezoelectric resonator element of cyrstallographic point... Piezoelectric resonator element of cyrstallographic point...

2006-05-30

2006-05-30

Budd, Mark (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S312000, C310S321000

Reexamination Certificate

active

07053533

ABSTRACT:
A piezoelectric resonator element of crystallographic point group 32, which can be operated as a thickness shear resonator contacting a carrier medium includes a singly rorated Y-cut (S1,S2) that is essentially rotated through an angle φabout the crystallographic x-axis, which differs from crystal cuts that are temperature-compensated in air or vacuum, wherein the cut has a negative temperatue coeffcient of the resonace frequency f(T) in a predetermined temperature range, preferably between 10° C. and 40° C., when there is no contact with the carrier medium, while the value of the linear temperature coeffcient a of resonance frequency in the same temperature range is less than 1 ppm/° C., preferably less than 0.5 ppm/° C. when the resonator is inb contact with the carrier medium. The resonator element (1) can additionally be provided with at least one layer sensitive to the parameter to be measured.

REFERENCES:
patent: 4234812 (1980-11-01), Kawashima
patent: 4242096 (1980-12-01), Oliveira et al.
patent: 4418299 (1983-11-01), Momosaki
patent: 4735906 (1988-04-01), Bastiaans
patent: 5001053 (1991-03-01), Takahashi et al.
patent: 5221873 (1993-06-01), Totty et al.
patent: 5705399 (1998-01-01), Larue
patent: 6005331 (1999-12-01), Sakharov et al.
patent: 6518778 (2003-02-01), Vig et al.
patent: 6580196 (2003-06-01), Shiono et al.
patent: 6621194 (2003-09-01), Sugimoto et al.
P. Krempl et al., “Gallium Phosphate, GaPO4: A New Piezoelectric Crystal Material for High-Temperature Sensories” inSensors and Actuators, A61 (1997), pp. 361-363.
I. Postnikov, “Effect of Temperature or Frequency Characteristics of Contoured-Quartz Thickness-Shear-Type Vibrators”Acoustical Physics, 40 (1994), Jul./Aug., No. 4, pp. 586-592.
F. Eichelbaum et al., “Oszillatoren für Quartz-Crystal-Microbalance-Sensoren in Flüssigkeiten” inTechnisches Messen, 65 (1998), pp. 434-444.
Nakazawa et al., “Reliable Quadratic for Frequency-Turnover Temperature VS Orientation of Rotated Y-Cut Quartz Plate Resonator Oscillating in C-Mode”, 1994 IEEE International Frequency Control Symposium.

Affiliated with

Also associated with

Rating

Piezoelectric resonator element of cyrstallographic point... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Piezoelectric resonator element of cyrstallographic point..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Piezoelectric resonator element of cyrstallographic point... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3588895