Frequency regulating method for tuning fork type vibrator...

Details Frequency regulating method for tuning fork type vibrator... Frequency regulating method for tuning fork type vibrator...

2004-03-08

2008-08-26

San Martin, Jaydi A (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C331S156000

Reexamination Certificate

active

07417362

ABSTRACT:
A piezoelectric element of a tuning fork resonator comprises a base portion and a plurality of leg portions. Drive electrodes are formed on top and bottom major surfaces and both side surfaces of each leg portion. The drive electrodes have polarities different between on the top and bottom major surfaces and the both side surfaces. The drive electrodes on the side surfaces are connected to each other. Further, metal film for frequency adjustment is formed on a tip portion of each leg portion of the piezoelectric element. The frequency adjustment is performed by removing the metal film formed on at least one surface of side surfaces and a tip surface of the tip portion by beam irradiation.

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