Fujifilm corporation (20240114797). PIEZOELECTRIC ELEMENT AND ACTUATOR simplified abstract

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PIEZOELECTRIC ELEMENT AND ACTUATOR

Organization Name

fujifilm corporation

Inventor(s)

Hiroyuki Kobayashi of Kanagawa (JP)

Seigo Nakamura of Kanagawa (JP)

Shinya Sugimoto of Kanagawa (JP)

Tsutomu Sasaki of Kanagawa (JP)

PIEZOELECTRIC ELEMENT AND ACTUATOR - A simplified explanation of the abstract

This abstract first appeared for US patent application 20240114797 titled 'PIEZOELECTRIC ELEMENT AND ACTUATOR

Simplified Explanation

The abstract describes a piezoelectric element with specific characteristics related to the alignment of spontaneous polarizations in the piezoelectric films and their coercive voltages.

  • The piezoelectric element includes a substrate, first electrode, first piezoelectric film, second electrode, second piezoelectric film, and third electrode.
  • Both the first and second piezoelectric films have spontaneous polarizations aligned in the film thickness direction.
  • The directions of the spontaneous polarizations in both films are the same.
  • The coercive voltages of the two piezoelectric films are denoted as vcf and vcr, with vcr < 0.8 * vcf and vcf < 0.8 * vcr.

Potential Applications

This technology could be applied in:

  • High-precision sensors
  • Actuators for nanoscale positioning
  • Energy harvesting devices

Problems Solved

  • Improved sensitivity and response time in piezoelectric devices
  • Enhanced performance in microelectromechanical systems (MEMS)
  • Increased efficiency in energy conversion applications

Benefits

  • Higher accuracy and reliability in sensing applications
  • Greater control and precision in actuation systems
  • Improved energy efficiency in power generation devices

Potential Commercial Applications

  • Medical devices
  • Aerospace technology
  • Consumer electronics

Possible Prior Art

One possible prior art could be the use of piezoelectric elements with aligned spontaneous polarizations, but the specific relationship between coercive voltages as described in this patent application may be novel.

Unanswered Questions

How does this technology compare to existing piezoelectric elements in terms of performance and cost?

This article does not provide a direct comparison with existing piezoelectric elements in terms of performance and cost. Further research or testing would be needed to address this question.

What are the potential challenges in scaling up this technology for industrial production?

The article does not discuss the challenges in scaling up this technology for industrial production. Factors such as manufacturing processes, material availability, and quality control could be potential challenges that need to be addressed.


Original Abstract Submitted

a piezoelectric element includes a substrate, a first electrode, a first piezoelectric film, a second electrode, a second piezoelectric film, and a third electrode, in which both the first piezoelectric film and the second piezoelectric film have spontaneous polarizations aligned in a film thickness direction and directions of the spontaneous polarizations are the same, and in a case where in a hysteresis curve of one piezoelectric film, a coercive voltage vcf, a coercive voltage vcf, |vcf−vcf|=�vcf, and the larger of an absolute value of vcf and an absolute value of vcf is denoted by vcf, and in a hysteresis curve of the other piezoelectric film, a coercive voltage vcr, a coercive voltage vcr, |vcr−vcr|=�vcr, and the larger of an absolute value of vcr and an absolute value vcr is denoted by vcr, �vcr<�vcf−0.2 and vcr<vcf−0.2 are satisfied.

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