Patent ID: 11910718
Assignee: XAAR TECHNOLOGY LIMITED
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC H  B | IPC B  H

Claim 0:
1. A piezoelectric thin film element comprising:
a first electrode;
a second electrode; and
a piezoelectric thin film having a perovskite ABO3 crystal structure, the piezoelectric thin film being arranged between the first and second electrodes and in contact with the first and second electrodes,
wherein
the piezoelectric thin film comprises a laminate having two or more piezoelectric thin film layers and wherein a first thin film layer is singly doped by a first donor dopant and a second thin film layer is singly doped by a second dopant selected from one of dopant type consisting of one of donor dopants, acceptor dopants and isovalent dopants, wherein the second dopant is different from the first donor dopant; and
the piezoelectric thin film is configured to be deformed upon application of a predetermined drive voltage between the first and second electrodes.