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Method for producing a piezoelectric multilayer component and a piezoelectric multilayer component

A piezoelectric and device technology, used in the field of manufacturing piezoelectric multilayer devices and piezoelectric multilayer devices, can solve problems such as device failure and short circuit, and achieve the effect of reducing cost

Inactive Publication Date: 2015-06-03
EPCOS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such so-called stretch cracks or polar cracks can also buckle, run perpendicular to the electrodes and thus, for example, bridge two electrodes, which leads to a short circuit and to failure of the device

Method used

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  • Method for producing a piezoelectric multilayer component and a piezoelectric multilayer component
  • Method for producing a piezoelectric multilayer component and a piezoelectric multilayer component
  • Method for producing a piezoelectric multilayer component and a piezoelectric multilayer component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0058] figure 1 A schematic side view of a piezoelectric multilayer device in the form of a piezoelectric actuator is shown. The component has a stack 1 of piezoelectric layers 10 arranged one above the other and an internal electrode 20 situated between these piezoelectric layers. The internal electrode 20 is formed as an electrode layer. The piezoelectric layer 10 and the internal electrode 20 are arranged one above the other.

[0059] The piezoelectric layer 10 contains a ceramic material such as lead zirconate titanate (PZT) or lead-free ceramics. The ceramic material may also contain dopant substances. Internal electrode 20 contains, for example, a mixture or alloy of Ag and Pd or of Cu and Pd. Pd has a weight fraction of up to 40% in the electrode material.

[0060] To produce the stack 2 , for example by film stretching or film casting, a green film comprising ceramic powder, organic binder and solder is produced. Electrode paste is applied by means of screen prin...

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Abstract

A method for producing a piezoelectric multilayer component is disclosed. Piezoelectric green films and electrode material are provided, arranged alternately on top of one another and sintered. The electrode material is provided with a PbO-containing coating and / or PbO is mixed into the electrode material.

Description

technical field [0001] A method for manufacturing a piezoelectric multilayer device is described in which a stack is formed from layers of piezoelectric green film and electrode material and the stack is sintered. [0002] Furthermore, a piezoelectric multilayer component is specified, which has a stack of sintered piezoelectric layers and internal electrodes arranged between the piezoelectric layers. Such multilayer components are, for example, piezoelectric actuators which can be used in motor vehicles to actuate fuel injectors. Background technique [0003] The reliability of a piezoelectric multilayer device depends on the knowledge of cracks that may occur during the manufacture of said piezoelectric multilayer device. Such cracks can arise, for example, during thermal processes such as sintering, metallization and soldering or during polarization, since elastic stresses occur due to different expansions in different regions of the component. Such so-called stretch cr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/047H01L41/083H01L41/187H01L41/273H01L41/297
CPCH10N30/871H10N30/508H10N30/067H10N30/053H10N30/8554H10N30/1051
Inventor A. 格拉朱诺夫O. 德诺夫塞克
Owner EPCOS AG