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Piezoelectric element

A technology of piezoelectric elements and piezoelectric layers, applied in the field of piezoelectric elements, to achieve the effect of easy polarization treatment

Inactive Publication Date: 2014-02-12
ALPS ALPINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, in the structure like Conventional Example 2, in order to perform electret treatment (polarization treatment), there are following difficulties: a special electret treatment device 990 must be used, and copper sheets (971, 972) must be used on one side. Electret treatment (polarization treatment) is performed while sandwiching and controlling the low-viscosity dielectric rubber laminate 900 or dielectric rubber layer 920
In addition, since thermosetting base rubber 925 is used, it is difficult to cross-link and harden simultaneously with electret treatment (polarization treatment)

Method used

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no. 1 Embodiment approach ］

[0047] figure 1 It is a configuration diagram illustrating the piezoelectric element 101 according to the first embodiment of the present invention, and is a plan view thereof. figure 2 It is a configuration diagram for explaining the piezoelectric element 101 according to the first embodiment of the present invention, from figure 1 Side view of Y2 side view shown. image 3 It is a figure explaining the piezoelectric element 101 of 1st Embodiment of this invention, image 3 (a) is figure 1 The sectional view at the line II-II shown, image 3 (b) is figure 1 Sectional view at line III-III shown. also, Figure 1 to Figure 3 This is a structural diagram for easy explanation, so the dimensions in the thickness direction (Z1-Z2 direction) are greatly different from the actual ones.

[0048] The piezoelectric element 101 according to the first embodiment of the present invention is as Figure 1 to Figure 3 As shown, a first electrode layer 11 laminated on a flexible sub...

no. 2 Embodiment approach ］

[0086] Figure 7 It is a configuration diagram illustrating the piezoelectric element 102 according to the second embodiment of the present invention, and is a plan view thereof. Figure 8 It is a configuration diagram illustrating the piezoelectric element 102 according to the second embodiment of the present invention, from Figure 7 Side view of Y2 side view shown. Figure 9 It is a figure explaining the piezoelectric element 102 of 2nd Embodiment of this invention, Figure 9 (a) is Figure 7 Sectional view at line IX-IX shown, Figure 9 (b) is Figure 7 Sectional view at line X-X shown. The piezoelectric element 102 of the second embodiment differs from the first embodiment in that piezoelectric layers ( 23A, 23B) are provided on both surfaces of a substrate 29 . In addition, the same code|symbol is attached|subjected to the same structure as 1st Embodiment, and detailed description is abbreviate|omitted. in addition, Figure 7 to Figure 9 This is a structural diag...

Deformed example 1

[0112] In the above-mentioned first embodiment, the conductive silver-containing phenolic resin is preferably used for the second electrode layer 12 , but the conductive member and synthetic resin used for the first electrode layer 11 may also be used.

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PUM

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Abstract

The invention aims to provide a piezoelectric element which can easily perform poling process. The piezoelectric element (101) is characterized by comprising a first electrode layer (11) stacked on a flexibility base material (19), a piezoelectric layer (13) stacked on the first electrode layer (11) and a second electrode layer (12) stacked on the piezoelectric layer (13). In the piezoelectric element (101), the piezoelectric layer (13) is formed by thermoplastic resin including barium titanate grains, the softening point of the thermoplastic resin being lower than the curie point of the barium titanate grains.

Description

technical field [0001] The present invention relates to piezoelectric elements used for actuators, various sensors, and power generation. Background technique [0002] Piezoelectric elements are used for energy conversion between electrical energy and mechanical energy, and are widely used in actuators and various sensors. Furthermore, in recent years, application to power generation has also been studied. [0003] Commonly known piezoelectric elements use ceramic dielectrics, and those that have been sintered at high temperatures are commonly used. In Patent Document 1 (Conventional Example 1), it is disclosed that Figure 11 A piezoelectric element 800 of the type shown in which dielectric powder is incorporated, reinforced, and sintered at a high temperature is shown. Figure 11 It is a cross-sectional view schematically showing the piezoelectric element 800 of Conventional Example 1. FIG. The piezoelectric element 800 of Conventional Example 1 such as Figure 11 As sho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/18
Inventor 不藤平四郎铃木克俊后藤厚志
Owner ALPS ALPINE CO LTD
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