Piezoelectric resonator

The utility model discloses a piezoelectric resonator comprising a work zone, wherein the work zone consists of a piezoelectric film layer, an upper metal electrode and a lower metal electrode; the upper metal electrode is formed on an upper surface of the piezoelectric film layer, the lower metal e...

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Bibliographic Details
Main Authors DU JIANKE, ZHANG WENLIANG, HUANG DEJIN, LUO XINYI, WANG JI
Format Patent
LanguageChinese
English
Published 17.07.2013
Subjects
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
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Summary:The utility model discloses a piezoelectric resonator comprising a work zone, wherein the work zone consists of a piezoelectric film layer, an upper metal electrode and a lower metal electrode; the upper metal electrode is formed on an upper surface of the piezoelectric film layer, the lower metal electrode is formed on a lower surface of the piezoelectric film layer, and the piezoelectric film layer consists of a central column piezoelectrics and a plurality of different diameter of cylindrical piezoelectrics. The small-diameter cylindrical piezoelectrics is coaxially arranged inside of the large-diameter cylindrical piezoelectrics. The central column piezoelectrics is coaxially mounted inside of the cylindrical piezoelectrics having the smallest diameter. The advantages are that the structure reduces amplitude of a parasitic vibration mode and can effectively raise electromechanical coupling factor.
Bibliography:Application Number: CN2013211344U