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

Claim 19:
20. A method for manufacturing a piezoelectric thin film element comprising:
forming a first piezoelectric thin film layer having perovskite crystal structure (ABO3) on a first electrode;
forming one or more piezoelectric thin film layers having the perovskite ABO3 crystal structure on the first piezoelectric thin film layer to form a laminate comprising a plurality of piezoelectric thin film layers;
forming a second electrode on top the plurality of piezoelectric thin film layers; and
coupling a controller to the first electrode and the second electrode,
wherein:
the first piezoelectric thin film layer is singly doped by a first donor dopant,
a second layer of the plurality of piezoelectric thin film layers is singly doped by a second dopant different from the first donor dopant of the first thin film layer, and
the controller is configured to apply a drive voltage that causes the plurality of piezoelectric thin film layers to deform.