Patent · US Expired

Piezoelectric crystal microbalance device

US6006589A · kind A · utility

24Cited by

6References

20Claims

0Family size

Assignee

O-Sense AB · SE

Inventors

Michael Rodahl · Göteborg, SE
Fredrik Höök · Alingsås, SE
Anatol Krozer · Gothenburg, SE
Bengt Kasemo · Mellerud, SE

Key dates

Filing date	Sep 25, 1997
Grant date	Dec 28, 1999
Priority date	—
Expiry date	Sep 25, 2017

Classification

Technology area (CPC G)Physics
CPC primaryG01N2291/0426
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A device and a process for measuring resonant frequency and dissipation factor of a piezoelectric resonator are presented. After exciting the resonator to oscillation, the driving power to the oscillator is turned off after the decay of the oscillation of the resonator is recorded and used to give a measure of at least one of the resonators properties, such as dissipation factor, changes in the dissipation factor, resonant frequency and changes in the resonant frequency.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.