Title:
PIEZOELECTRIC ELEMENT, DROPLET DISCHARGE HEAD, FERROELECTRIC MEMORY, AND PIEZOELECTRIC ACTUATOR
Document Type and Number:
WIPO Patent Application WO/2022/255121
Kind Code:
A1
Abstract:
This piezoelectric element is provided with a first electrode, a second electrode, and a piezoelectric film positioned between the first electrode and the second electrode, the piezoelectric element being characterized in that: the first electrode is an electrode to which a relatively positive voltage is applied when the piezoelectric element is driven; the second electrode is an electrode to which a relatively negative voltage is applied when the piezoelectric element is driven; and, a coefficient A obtained from the following logarithmic approximation equation in an aging test in which an electric field of 10 V/μm is applied at an ambient temperature of 80°C is equal to or greater than -4.200×10-2. Φ2 = A × ln(t) + B Φ2: Schottky barrier height [eV] between the second electrode and the piezoelectric film when a positive electric field of 12.68 V/μm is applied to the first electrode t: Aging time [h] A: Coefficient B: Coefficient
Inventors:
MATSUSHITA YUJI (JP)
HARA SHINTARO (JP)
MASHIMA HIDEKI (JP)
HARA SHINTARO (JP)
MASHIMA HIDEKI (JP)
Application Number:
PCT/JP2022/020869
Publication Date:
December 08, 2022
Filing Date:
May 19, 2022
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
H01L41/187; B41J2/14; H01L27/11507; H01L41/09
Foreign References:
| JP2010201830A | 2010-09-16 | |||
| JP2019047114A | 2019-03-22 | |||
| JP2012009661A | 2012-01-12 | |||
| JP2008294345A | 2008-12-04 |
Attorney, Agent or Firm:
KOYO INTERNATIONAL PATENT FIRM (JP)
Download PDF: