制备了薄膜压电变压器并测试了其性能，这在国内尚未见报道。

Prepare the thin film piezoelectric transformer and test the its performance. This doesn't appear in the newspapers still at home.

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本文从基本的物理学原理入手，建立了纵纵式厚度伸缩薄膜压电变压器的物理模型以及等效电路。

In this article, form the physical principle, the model and the equivalent circuit of thickness extensional vibration mode of thin film transformer is built.

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