Piezoelectric device

The present invention provides a piezoelectric device. The piezoelectric device includes a piezoelectric vibrating piece and a base. The piezoelectric vibrating piece includes an excitation portion, a framing portion, a connecting portion, excitation electrodes, and extraction electrodes. The base i...

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Bibliographic Details
Main Authors ARIJI TAKUMI, MORITA KUNIO, OCHIAI TOMOYUKI
Format Patent
LanguageEnglish
Published 03.06.2015
Subjects
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
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Summary:The present invention provides a piezoelectric device. The piezoelectric device includes a piezoelectric vibrating piece and a base. The piezoelectric vibrating piece includes an excitation portion, a framing portion, a connecting portion, excitation electrodes, and extraction electrodes. The base includes a mounting terminal, a cutout portion formed on a side surface, and a cutout-portion electrode formed in the cutout portion. The cutout-portion electrode connects the mounting terminal to the extraction electrode. The extraction electrode includes a cutout-portion region connected to the cutout-portion electrode, an excitation-electrode connecting region connected to the excitation electrode, and an erosion preventing region disposed between the cutout-portion region and the excitation-electrode connecting region. The extraction electrode in the erosion preventing region is formed without containing gold (Au) and silver (Ag), and the extraction electrodes in the cutout-portion region and the excitation-electrode connecting region are formed containing at least one of gold (Au) and silver (Ag). According to the present invention, when the piezoelectric device is mounted to a substrate by solder, the excitation electrodes are prevented from erosion by solder.
Bibliography:Application Number: CN201410707907