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1. 发明授权

US5118982A Thickness mode vibration piezoelectric transformer 失效
标题翻译：厚度模式振动压电变压器
公开(公告)号：US5118982A
公开(公告)日：1992-06-02
申请号：US530930
申请日：1990-05-30
申请人： Takeshi Inoue , Osamu Ohnishi , Nobuo Ohde
发明人： Takeshi Inoue , Osamu Ohnishi , Nobuo Ohde
IPC分类号： H01L41/107 , H03H9/58
CPC分类号： H03H9/178 , H01L41/107 , H03H9/581
摘要： Low and high impedance thickness mode vibration portions are integrally laminated. Each vibrator portion comprises electrode layers between which a piezoelectric layer polarized in the direction of thickness is interposed. In each vibrator portion, every other electrode layer is connected to respective common external terminals. These common external terminals are of either four-terminal construction consisting two pairs, one pair for the low impedance mode vibrator portion and the other pair for the high impedance thickness mode vibrator portion, or three-terminal construction in which one of each pair are united together into a common terminal. Difference between the impedances is set on difference in the number of electrode layers and/or on difference in dielectric constant between the piezoelectric layers.
摘要翻译：低阻抗和高阻抗厚度模式振动部分被整体层压。每个振动器部分包括电极层，在该电极层之间插入有沿厚度方向偏振的压电层。在每个振动器部分中，每隔一个电极层连接到相应的公共外部端子。这些公共外部端子是四端子结构，其包括两对，用于低阻抗模式振动器部分的一对，以及用于高阻抗厚度模式振动器部分的另一对，或者其中每对一个组合在一起的三端构造一起成为一个共同的终端。阻抗之间的差异设定在电极层的数量和/或压电层之间的介电常数的差异上。

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