18805553. PIEZOELECTRIC LAMINATE AND PIEZOELECTRIC ELEMENT (FUJIFILM Corporation)
PIEZOELECTRIC LAMINATE AND PIEZOELECTRIC ELEMENT
Organization Name
Inventor(s)
Hiroyuki Kobayashi of Kanagawa JP
PIEZOELECTRIC LAMINATE AND PIEZOELECTRIC ELEMENT
This abstract first appeared for US patent application 18805553 titled 'PIEZOELECTRIC LAMINATE AND PIEZOELECTRIC ELEMENT
Original Abstract Submitted
A piezoelectric laminate comprise: a substrate, a lower electrode layer and a piezoelectric film, in which in a case where an upper electrode layer is formed on the piezoelectric film, and a voltage applied between the upper electrode layer and the lower electrode layer is swept, in a current-voltage curve showing a change in a current with respect to a change in the voltage, which is obtained in a case where with the lower electrode layer being grounded and the upper electrode layer being used as a drive electrode, an applied voltage to the piezoelectric film is gradually increased from 0 V to a positive side and then gradually decreased from the positive side to a negative side via 0 V, the number of peaks during an increase of the voltage and the number of peaks during a decrease of the voltage are different from each other.