Piezo-electric composite sensor

A piezoelectric composite and piezoelectric composite material technology, which is applied in the field of piezoelectric sensors using piezoelectric composite materials, can solve the problems of limited adjustment range of electrode thickness, weakened electrical properties of thin film layers, and fragile electrodes, and achieves excellent performance. Piezoelectric and dielectric properties, ease of processing, effect of reducing process cost

Inactive Publication Date: 2008-06-04
ATSUDEN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since this process is an additional process independent of the piezoelectric composite molding process, there is a problem in that the process is very complicated and the cost increases accordingly
In addition, since the electrodes are formed in the metal thin film, there is a problem that the electrodes are very fragile du

Method used

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  • Piezo-electric composite sensor

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Embodiment Construction

[0049] [46] Preferred embodiments of the piezoelectric composite sensor according to the present invention will be described below with reference to the drawings.

[0050] [47] FIG. 2 is a sectional view showing a piezoelectric composite sensor according to a preferred embodiment of the present invention.

[0051] [48] ​​Referring to the figure, the piezoelectric composite sensor includes a piezoelectric material layer 10 and electrodes 20 formed on both surfaces of the piezoelectric material layer.

[0052] [49] Ceramic materials or electrodes in traditional products are easily broken, when the piezoelectric composite sensor constructed as shown in Figure 2 is applied to traditional products, it can improve product reliability and durability, and prolong product life. For example, the advantageous features of the present embodiment can be effectively applied to an automobile tire pressure management system, which functions to notify dangerous situations in advance by sensing ...

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Abstract

The present invention provides a piezoelectric composite sensor comprising a piezoelectric material layer formed of a piezoelectric composite obtained by mixing piezoelectric material powder with a polymer, and electrodes formed of a conductive composite or conductive polymer obtained by mixing conductive filling particles with a polymer matrix and formed on both surfaces of the piezoelectric material layer. The piezoelectric composite sensor of the present invention has advantages of superior piezoelectric and dielectric properties, high mechanical strength, improved reliability and process flexibility, a simplified process and reduced process costs, and improved productivity.

Description

technical field [0001] [01] The present invention relates to a piezoelectric sensor, and more particularly, to a piezoelectric sensor using a piezoelectric composite material. Background technique [0002] [02] Functional ceramics having dielectric properties, piezoelectric properties, etc. are used in various electric and electronic parts in a wide range of fields. For example, functional ceramics are used in piezoelectric elements such as various actuators, sensors, and resonators. Functional ceramics with dielectric properties include silicon dioxide (SiO 2 ), alumina (Al 2 o 3 ), aluminum nitride (AlN), barium titanate (BaTiO 3 )wait. Functional ceramics having piezoelectric properties include lead zirconate titanate (PZT) and the like. [0003] [03] Piezoelectricity is called piezoelectricity, and is characterized in that when a piezoelectric element is pressed in a certain direction, an electric current is generated because dielectric poles proportional to the ex...

Claims

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Application Information

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IPC IPC(8): H01L41/04H01L41/16
CPCH01L41/087H01L41/22H01L41/047H01L41/1132H01L41/333Y10T29/42H10N30/878H10N30/60H10N30/302H10N30/084H10N30/80H10N30/857H10N30/877
Inventor 金东局
Owner ATSUDEN
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