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Piezoelectric film with transparent electrode, and pressure sensor

A technology of transparent electrodes and piezoelectric films, applied in the measurement of the properties and forces of piezoelectric devices, piezoelectric/electrostrictive/magnetostrictive devices, instruments, etc., can solve the problem of reduced visibility of display images, Achieve the effects of good visibility, low haze value and high total light transmittance

Pending Publication Date: 2019-01-15
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In Patent Document 1, a laminate in which transparent electrodes are laminated on both sides of a piezoelectric layer containing a polyvinylidene fluoride-tetrafluoroethylene copolymer may have problems due to either or both of the haze value and the total light transmittance. Concerns that the visibility of the display image on the back of the touch panel will be reduced

Method used

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  • Piezoelectric film with transparent electrode, and pressure sensor
  • Piezoelectric film with transparent electrode, and pressure sensor
  • Piezoelectric film with transparent electrode, and pressure sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0149] [Piezoelectric film]

[0150] The piezoelectric thin film with transparent electrodes of Example 1 has the configuration of the second example (102) of the piezoelectric thin film with transparent electrodes of the present invention. The piezoelectric film 13 included in the piezoelectric film with a transparent electrode of Example 1 was produced by first forming a layer (not shown) on the surface of the first base film 11 (polyethylene terephthalate film). The easy-adhesive layer was produced by applying a solution of a copolymer (binary copolymer) of vinylidene fluoride and trifluoroethylene next. The thickness of the first base film 11 (polyethylene terephthalate film) was 23 μm.

[0151] When fabricating the piezoelectric coating 12, first, a copolymer (binary system copolymer) of vinylidene fluoride and trifluoroethylene was dissolved in methyl ethyl ketone at room temperature by ultrasonic waves, and vinylidene fluoride and trifluoroethylene were produced. A solu...

Embodiment 2

[0159] The piezoelectric thin film with transparent electrodes of Example 2 has the configuration of the first example (101) of the piezoelectric thin film with transparent electrodes of the present invention. The piezoelectric film 13 included in the piezoelectric film with transparent electrodes of Example 2 was produced in the same manner as the piezoelectric film 13 included in the piezoelectric film with transparent electrodes of Example 1. The first transparent electrode 14 included in the piezoelectric thin film with transparent electrodes of Example 2 was formed in the same manner as the first transparent electrode 14 included in the piezoelectric thin film with transparent electrodes of Example 1, and carried out until the Until the first transparent electrode 14 is crystallized.

Embodiment 3

[0161] The piezoelectric thin film with transparent electrodes of Example 3 has the configuration of the twenty-third example (123) of the piezoelectric thin film with transparent electrodes of the present invention. The piezoelectric film 13 included in the piezoelectric film with transparent electrodes of Example 3 was produced in the same manner as the piezoelectric film 13 included in the piezoelectric film with transparent electrodes of Example 1. The first transparent electrode 14 included in the piezoelectric thin film with transparent electrodes of Example 3 was formed in the same manner as the first transparent electrode 14 included in the piezoelectric thin film with transparent electrodes of Example 1, and carried out until the Until the first transparent electrode 14 is crystallized.

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Abstract

This piezoelectric film 1 with a transparent electrode is provided with: a piezoelectric film 13 which comprises a laminate of a first base film 11 and a piezoelectric coating layer 12; and a first transparent electrode 14 which is laminated on the piezoelectric coating layer 12. The piezoelectric coating layer 12 contains a fluororesin. The fluororesin is a polymer of vinylidene fluoride or a copolymer of two or more compounds selected from among vinylidene fluoride, trifluoroethylene and chlorotrifluoroethylene. The piezoelectric coating layer 12 is able to be obtained by applying a solutionof the fluororesin to the first base film 11 and subsequently drying the solution thereon. A piezoelectric film according to the present invention enables the achievement of a piezoelectric film witha transparent electrode, which has low haze value and high total light transmittance.

Description

technical field [0001] The invention relates to piezoelectric films and pressure sensors with transparent electrodes. Background technique [0002] Generally, for a touch panel, the two-dimensional position on the surface of a finger or a pen touching the surface of the touch panel is detected. (Hereafter, "finger or pen" is simply referred to as "finger", and the two-dimensional position of the finger or pen on the touch panel surface is referred to as "XY coordinates of the finger".) In this case, the pressure of the finger touch cannot be detected. (Hereafter, the pressure of the finger touch is considered to be in the Z-axis direction, and it is called "the Z coordinate of the finger".) That is, no matter what the pressure of the finger touch (the Z coordinate of the finger) is, only the finger touch position can be detected The XY coordinates. [0003] However, depending on the application used on the touch panel, it is sometimes necessary to recognize the pressure of...

Claims

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Application Information

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IPC IPC(8): H01L41/047B32B27/30C08J7/04G01L1/16G06F3/041H01L41/113H01L41/193
CPCG06F3/041G01L1/16C08J7/04B32B27/30H10N30/87H10N30/302H10N30/50H10N30/857H10N30/704
Inventor 拝师基希矢野孝伸别府浩史木曽宪俊梨木智刚
Owner NITTO DENKO CORP