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US 11,910,159 B2Granted
Laminated piezoelectric element and electroacoustic transducer
AssigneeFUJIFILM Corporation
InventorTetsu Miyoshi
Life of this patent
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Abstract
An object is to provide a laminated piezoelectric element capable of preventing a short circuit between adjacent piezoelectric films and an electroacoustic transducer using the laminated piezoelectric element. The object is solved by laminating a plurality of layers of piezoelectric films polarized in a thickness direction, in which a piezoelectric layer is interposed between two thin film electrodes, and causing polarization directions of the adjacent piezoelectric films to be opposite to each other.
Claims17
A laminated piezoelectric element comprising:
- a plurality of layers of laminated piezoelectric films having a piezoelectric layer interposed between two thin film electrodes, and
- a bonding layer which bonds adjacent piezoelectric films to each other,
- wherein the piezoelectric film is polarized in a thickness direction,
- polarization directions of adjacent piezoelectric films are opposite to each other, and
- the thickness of the bonding layer is 0.1 to 50 μm.
2 more elements
Dependencies are inferred from the claim text.