WO2004019424A2 - Piezoaktor - Google Patents
Piezoaktor Download PDFInfo
- Publication number
- WO2004019424A2 WO2004019424A2 PCT/DE2003/001799 DE0301799W WO2004019424A2 WO 2004019424 A2 WO2004019424 A2 WO 2004019424A2 DE 0301799 W DE0301799 W DE 0301799W WO 2004019424 A2 WO2004019424 A2 WO 2004019424A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- corners
- electrodes
- piezo
- piezo actuator
- rounded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/50—Piezoelectric or electrostrictive devices having a stacked or multilayer structure
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/87—Electrodes or interconnections, e.g. leads or terminals
- H10N30/871—Single-layered electrodes of multilayer piezoelectric or electrostrictive devices, e.g. internal electrodes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
Definitions
- the invention relates to a piezo actuator, for example for actuating a mechanical component such as a valve or the like, according to the generic features of the main claim.
- a piezo element can be constructed from a material with a suitable crystal structure using the so-called piezo effect.
- an external electrical voltage is applied, there is a mechanical reaction of the piezo element which, depending on the crystal structure and the contact areas of the electrical voltage, represents a push or pull in a predefinable direction.
- this piezo actuator as a so-called multilayer actuator can take place here, as described for example in DE 199 28 191 A1, in several layers, the electrodes via which the electrical voltage is applied being arranged between the layers.
- the piezo actuator make sure that Mechanical stresses in the layer structure do not cause any troublesome cracks.
- the electrodes are mutually contacted laterally, they cannot always be guided completely to the opposite side, since otherwise voltage flashovers can destroy the piezo actuator.
- the mutual contacting is constructed in such a way that in the layer structure, two inner electrodes, which include a different-pole inner electrode contacted on the opposite side, are contacted together on one side. Alternately in the layer structure, one of these mutually contacted internal electrodes is now not led to the end of the piezo layers and the other one to the end of the piezo layer, forming a neutral phase.
- the design of the internal electrodes is generally selected as a function of the necessary external shape of the piezo actuator, with most actuator shapes also resulting from the manufacturing technology or the cutting of the actuator stacks. Since the edges resulting from the cut can easily lead to voltage flashovers, processing of the edges is often necessary, but this can be very complex and expensive, especially if it is carried out subsequently on the actuator.
- the piezo actuator described at the outset which can be used, for example, to actuate a mechanical component, is advantageously constructed with a multilayer structure of piezo layers and internal electrodes arranged between them.
- the individual inner electrodes are rounded at the corners formed by the cut edges before assembly to form the multilayer structure.
- the corners of the chamfers can also be rounded in a simple manner. It is particularly advantageous here if the curves each have a radius of curvature of at least 20 ⁇ m in order not to act as a tip or edge. With the invention, it is then possible in a simple manner to dispense with machining the edge of the piezo actuator, since this would be complex and expensive, in particular in order to subsequently produce roundings.
- FIG. 1 shows a section through a piezo actuator according to the prior art with a multilayer structure of layers of pizza ceramic and with mutually contacted inner electrodes and well-shaped outer electrodes,
- FIG. 2 shows a detailed view of the internal electrodes with rounded corners
- Figure 3 is a detailed view of the internal electrodes with rounded corners that are already chamfered
- Figure 4 shows another embodiment of an internal electrode design with rounded corners or edges. Description of the embodiments
- FIG. 1 shows a piezo actuator 1 which is constructed in a manner known per se from piezo foils 2 of a quartz material with a suitable crystal structure, so that using the so-called piezo effect when an external electrical voltage is applied to internal electrodes 3 and 4, which are only shown schematically here Outside electrodes 5 and 6 contacted externally, a mechanical reaction of the piezo actuator 1 takes place.
- the outer electrodes 5 and 6 are designed as corrugated electrodes which are contacted on contact surfaces 8 with two inner electrodes each having the same polarity.
- the piezo layers 2 and 2a, 2b are alternately offset inwards at the corners in a predetermined area, as a result of which a groove 9 and 9a, 9b is formed.
- an inner electrode 10 is provided with a curve 12 at its corners 11 shown in broken lines.
- the inner electrode 13, which is offset for mutual contacting, is provided with curves 15 at its corners 14.
- FIG. 3 An embodiment is shown in which chamfers 16 at the corners of the inner electrode 10 have likewise been provided with a rounded portion 17. The same applies to chamfers 16 at the corners of the inner electrode 13 according to FIG. 3.
- FIG. Men Another exemplary embodiment of a design for the internal electrodes 10 and 13 can be seen from FIG. Men, in which in addition to the curves 12 mutually rounded neutral areas 18 are recessed so that outer electrodes 19 and 20 can be attached.
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
- Impact Printers (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/524,789 US20060132002A1 (en) | 2002-08-16 | 2003-06-02 | Piezoelectric actuator |
| EP03740053A EP1530806A2 (de) | 2002-08-16 | 2003-06-02 | Piezoaktor |
| JP2004529689A JP2005536066A (ja) | 2002-08-16 | 2003-06-02 | 圧電アクチュエータ |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10237588A DE10237588A1 (de) | 2002-08-16 | 2002-08-16 | Piezoaktor |
| DE10237588.7 | 2002-08-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2004019424A2 true WO2004019424A2 (de) | 2004-03-04 |
| WO2004019424A3 WO2004019424A3 (de) | 2004-07-08 |
Family
ID=30775347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2003/001799 Ceased WO2004019424A2 (de) | 2002-08-16 | 2003-06-02 | Piezoaktor |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20060132002A1 (de) |
| EP (1) | EP1530806A2 (de) |
| JP (1) | JP2005536066A (de) |
| KR (1) | KR20050032116A (de) |
| DE (1) | DE10237588A1 (de) |
| WO (1) | WO2004019424A2 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021072588A (ja) * | 2019-11-01 | 2021-05-06 | 日本電波工業株式会社 | 圧電デバイス及びその製造方法 |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK1811582T3 (da) * | 2006-01-20 | 2009-04-06 | Delphi Tech Inc | Piezoelektrisk aktuator |
| DE102006062076A1 (de) * | 2006-12-29 | 2008-07-10 | Siemens Ag | Piezokeramischer Vielschichtaktor und Verfahren zu seiner Herstellung |
| JP5877195B2 (ja) * | 2011-03-28 | 2016-03-02 | 日本碍子株式会社 | 圧電デバイス、及び、その焼成前の成形体であるグリーン成形体の製造方法 |
| JP6772728B2 (ja) * | 2016-09-29 | 2020-10-21 | Tdk株式会社 | 圧電素子 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69014954T2 (de) * | 1989-04-07 | 1995-05-24 | Mitsui Petrochemical Ind | Geschichtete Keramikanordnung und Verfahren zu deren Herstellung. |
| JPH04340778A (ja) * | 1991-01-30 | 1992-11-27 | Nec Corp | 積層圧電アクチュエータ素子 |
| DE19626671C1 (de) * | 1996-07-03 | 1997-10-16 | Fraunhofer Ges Forschung | Piezoelektrischer Leistungsaktor mit Kühlung und Verfahren zu seiner Herstellung |
| JP3262076B2 (ja) * | 1997-10-03 | 2002-03-04 | 株式会社村田製作所 | 圧電共振子、圧電共振子の周波数調整方法および通信機器 |
| DE19946837A1 (de) * | 1999-09-30 | 2001-05-03 | Bosch Gmbh Robert | Piezoaktor |
| JP2001339105A (ja) * | 2000-05-30 | 2001-12-07 | Tokin Ceramics Corp | 積層型圧電セラミックス及びその製造方法 |
| EP1160885B1 (de) * | 2000-05-31 | 2010-08-18 | Denso Corporation | Piezoelektrisches Bauelement für eine Einspritzvorrichtung |
-
2002
- 2002-08-16 DE DE10237588A patent/DE10237588A1/de not_active Withdrawn
-
2003
- 2003-06-02 WO PCT/DE2003/001799 patent/WO2004019424A2/de not_active Ceased
- 2003-06-02 JP JP2004529689A patent/JP2005536066A/ja active Pending
- 2003-06-02 KR KR1020057002540A patent/KR20050032116A/ko not_active Withdrawn
- 2003-06-02 US US10/524,789 patent/US20060132002A1/en not_active Abandoned
- 2003-06-02 EP EP03740053A patent/EP1530806A2/de not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021072588A (ja) * | 2019-11-01 | 2021-05-06 | 日本電波工業株式会社 | 圧電デバイス及びその製造方法 |
| JP7396858B2 (ja) | 2019-11-01 | 2023-12-12 | 日本電波工業株式会社 | 圧電デバイス及びその製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1530806A2 (de) | 2005-05-18 |
| KR20050032116A (ko) | 2005-04-06 |
| JP2005536066A (ja) | 2005-11-24 |
| US20060132002A1 (en) | 2006-06-22 |
| DE10237588A1 (de) | 2004-02-26 |
| WO2004019424A3 (de) | 2004-07-08 |
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