公开(公告)号：US20250089574A1

公开(公告)日：2025-03-13

申请号：US18580606

申请日：2022-09-06

Applicant: Konica Minolta, Inc.

Inventor： Yuji MATSUSHITA ,  Shintaro HARA ,  Hideki MASHIMA

IPC: H10N30/87 ,  B41J2/14 ,  H10B53/30 ,  H10N30/853

Abstract: A piezoelectric element comprising a first electrode, a second electrode, and a lead zirconate titanate film located between the first electrode and the second electrode. The piezoelectric element is formed on a Si substrate whose principal surface is (001) plane. The Si substrate has uniform crystalline orientation in an in-plane direction and an out-of-plane direction. (110) plane of the Si substrate and (100) plane of the lead zirconate titanate film are parallel. In a rocking curve measurement of an X-ray diffraction method, symmetric surface reflection peak of the lead zirconate titanate film obtained by X-rays incident from [100] direction of the Si substrate can be fitted with three component peaks.

公开(公告)号：US20240081151A1

公开(公告)日：2024-03-07

申请号：US18272527

申请日：2021-02-05

Applicant: Konica Minolta, Inc.

Inventor： Hideki MASHIMA ,  Shintaro HARA

IPC: H10N30/00 ,  H10N30/093 ,  H10N30/853

CPC classification number: H10N30/10516 ,  H10N30/093 ,  H10N30/8554 ,  B41J2/14233

Abstract: An electromechanical conversion element includes: a first electrode, an electromechanical conversion layer, and a second electrode provided on a substrate; a first high-temperature durable layer that contains a metal oxide between the first electrode and the electromechanical conversion layer; and a second high temperature durable layer that containing a metal oxide between the electromechanical conversion layer and the second electrode. The electromechanical conversion layer contains a perovskite-type crystal. Upon diffraction peak intensities of a (001) plane, a (101) plane, and a (111) plane in X-ray diffraction measurement of the electromechanical conversion layer being I(001), I(101), and I(111), respectively, a degree of orientation of the (001) plane represented by {I(001))/(I(001)+I(101)+I(111)}×100% is 99.0% or more.

公开(公告)号：US20240244979A1

公开(公告)日：2024-07-18

申请号：US18558670

申请日：2022-05-19

Applicant: Konica Minolta, Inc.

Inventor： Yuji MATSUSHITA ,  Shintaro HARA ,  Hideki MASHIMA

IPC: H10N30/87 ,  B41J2/14 ,  H10N30/853

CPC classification number: H10N30/87 ,  B41J2/14233 ,  H10N30/8554 ,  B41J2002/14258

Abstract: A piezoelectric element includes a first electrode, a second electrode and a piezoelectric film located between the first electrode and the second electrode. The first electrode is an electrode to which a relatively positive voltage is applied when the first electrode is driven, the second electrode is an electrode to which a relatively negative voltage is applied when the second electrode is driven, and a coefficient A obtained by the following logarithmic approximation formula 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.





Φ
2

=


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 period [h]
A: Coefficient
B: Coefficient