Abstract
Temperature characteristics of surface charge patterns of spurious vibrations near the fundamental modes in rectangular quartz plates have been measured. The technique is based on the electrical probe method that uses piezoelectrically induced surface charge. To measure the temperature characteristics of surface charge patterns, a measurement fixture with a DUT mover is set in a computer-controlled temperature chamber and these instruments are incorporated with a network analyzer based measurement system. The measurement results using 1 and 4 MHz rectangular AT-cut quartz resonators clearly indicate that the charge distributions of a spurious vibration and a fundamental one interchange their patterns according to temperature changes. >
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