WO2005124884A1 - Piezoaktor mit flexibler, flächenhafter aussenelektrode zur kontaktierung eines anschlusskontaktes - Google Patents
Piezoaktor mit flexibler, flächenhafter aussenelektrode zur kontaktierung eines anschlusskontaktes Download PDFInfo
- Publication number
- WO2005124884A1 WO2005124884A1 PCT/EP2005/051254 EP2005051254W WO2005124884A1 WO 2005124884 A1 WO2005124884 A1 WO 2005124884A1 EP 2005051254 W EP2005051254 W EP 2005051254W WO 2005124884 A1 WO2005124884 A1 WO 2005124884A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piezo actuator
- outer electrode
- electrodes
- actuator according
- contacting
- Prior art date
Links
- 239000000853 adhesive Substances 0.000 title claims abstract description 7
- 239000000463 material Substances 0.000 claims description 5
- 229910001374 Invar Inorganic materials 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 claims description 3
- 239000004809 Teflon Substances 0.000 claims description 2
- 229920006362 Teflon® Polymers 0.000 claims description 2
- 239000013078 crystal Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
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
- H10N30/80—Constructional details
- H10N30/87—Electrodes or interconnections, e.g. leads or terminals
- H10N30/872—Interconnections, e.g. connection electrodes of multilayer piezoelectric or electrostrictive devices
-
- 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
- H10N30/875—Further connection or lead arrangements, e.g. flexible wiring boards, terminal pins
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.
- This piezo actuator can be constructed here in several layers (multilayer actuators), the internal electrodes via which the electrical voltage is applied being arranged between the layers in the form of a so-called interdigital internal electrode design.
- Piezo actuators of this type can be provided, for example, for driving switching valves in fuel injection systems in motor vehicles.
- a piezo actuator is known from DE 100 26 005 AI, in which the respective outer electrodes, which provide the inner electrodes with the required voltage potentials.
- len supply built up like a net or tissue distributed on each side surface and are contacted at least point by point with the respective internal electrodes.
- the mesh-like or fabric-like outer electrodes are extended in such a way via the multilayer structure of the piezo layers that the electrical voltage is supplied to the extensions via corresponding connections.
- the piezo actuator described at the outset with a multilayer structure of piezo layers and internal electrodes arranged between them has planar external electrodes which are in contact with the respective internal electrodes.
- the contacting of the inner electrodes in the corner or side area of the piezo actuator is advantageously carried out in such a way that a side strip of the respective areal outer electrode extending over the length of the piezo actuator to be contacted is contacted with the piezo actuator and the respective inner electrodes and another side strip
- the flat outer electrode is provided with a connection contact for the external power supply. There is a flexible area between the two side strips.
- external electrodes in such a way that they are particularly suitable for piezo actuators which have only a narrow strip on the surface for contacting. This is particularly important for so-called corner contacting, where only a small area is available for contacting due to the special internal electrode design.
- This kind of in- Internal electrode designs are often chosen in order to be able to utilize as large an active area as possible, although here too there is a relatively small passive area which tends to crack during operation.
- a special flat outer electrode is particularly advantageous here, which ensures the current supply to the inner electrodes even when cracks form.
- the contacting of the inner electrodes enables an electrode structure which is only connected to the inner electrode on a narrow strip, but fully takes over the functions of the outer electrode, namely in particular the contacting of the component to the outside, the current supply to the inner electrodes and if cracks form in the Ceramic of the piezo actuator bridging across the cracks or a tolerance to cracks.
- an electrically conductive foil e.g. a sputtered Kapton film, a Teflon film or similar can be used.
- a rubber film interspersed with metal flakes or a plastic film coated on one or both sides with a conductive adhesive can also be used here.
- a planar outer electrode made of a mesh, fabric or sieve-like material, for example a metallic Invar sieve, can also be advantageously used here.
- the planar outer electrode can be soldered or welded to the respective connection contact and the inner electrodes in a manner known per se.
- the flat outer electrode with its flexible area around the corner led around the piezo actuator can also be located on the side face of the piezo actuator, preferably here also in the vicinity of the corner area.
- the flat outer electrode can easily be provided with a metallic contact pin.
- FIG. 1 shows a schematic view of a piezo actuator with a multilayer structure of layers made of piezoceramic and a flat outer electrode
- FIG. 2 shows a plan view of the end face of the piezo actuator with connections for the outer electrodes for supplying the electrical voltage
- FIG. 3 shows a variant of the flat surface Outer electrode as sieve outer electrode and Figures 4 and 5 embodiments of the geometric arrangement of the flat outer electrode.
- FIG. 1 shows a piezo actuator 1, which is constructed in a manner known per se from piezo foils of a ceramic material with a suitable crystal structure, so that, using the so-called piezo effect when an external electrical voltage is applied to internal electrodes, Roden 2 and 3 between the layers of piezo film via appropriate electrical connections, a mechanical reaction of the piezo actuator 1 takes place in a manner known per se from the prior art.
- FIG. 1 shows sections of mutual contacts, here the inner electrodes 3 on a side strip 4, in the corner region of the piezo actuator 1 with a planar outer electrode 5, which is guided away from the piezo actuator 1 with a flexible region 6 and via a connection pin 7 as a connection contact with a electrical voltage can be supplied.
- an electrically conductive, flexible film can be used as the material for the outer electrodes 5 and 8, in particular for designing the flexible region 6 between the contacted side strip 4 and the connecting pin 7.
- a sputtered Kapton film a rubber film interspersed with metal flakes, the degree of filling should be so high that the required conductivity is guaranteed, or a plastic film coated on one or both sides with conductive adhesive.
- the outer electrodes 5 and 8 according to FIG. 1 can also be glued to the piezo actuator 1 if they cannot be soldered. The contact is made on the narrow side strip 4 and the conductive film in any case protrudes beyond the piezo actuator 1.
- FIG. 1 A plan view of the end face of the piezo actuator 1 with the inner electrode 2 can be seen from FIG. Contact is here with the external electrode 8 and for the underlying inner electrode 3 with the outer electrode 5 schematically indicated.
- a metallic mesh screen 10 and 11 is provided as a further exemplary embodiment for a planar outer electrode.
- an Invar sieve is preferably proposed here.
- FIG. 4 and 5 show exemplary embodiments which in the case of FIG. 4 outer electrodes 5 and 8 guided around the corner area on the outside (cf. FIG. 1) and in the case of FIG. 5 on the respective side of the piezo actuator 1 inwardly corrugated outer electrodes 5 and 8 show.
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004028884A DE102004028884A1 (de) | 2004-06-15 | 2004-06-15 | Piezoaktor |
DE102004028884.4 | 2004-06-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005124884A1 true WO2005124884A1 (de) | 2005-12-29 |
Family
ID=34966067
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2005/051254 WO2005124884A1 (de) | 2004-06-15 | 2005-03-17 | Piezoaktor mit flexibler, flächenhafter aussenelektrode zur kontaktierung eines anschlusskontaktes |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE102004028884A1 (de) |
WO (1) | WO2005124884A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010040693A1 (de) * | 2008-10-06 | 2010-04-15 | Epcos Ag | Piezoaktor mit aussenelektrode |
WO2014198936A1 (de) * | 2013-06-14 | 2014-12-18 | Epcos Ag | Vielschichtbauelement mit einer aussenkontaktierung |
CN105814706A (zh) * | 2014-07-18 | 2016-07-27 | 大陆汽车有限公司 | 用于电接触压电叠层的器件以及压电叠层及其制造方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008058011A1 (de) * | 2008-11-19 | 2010-02-25 | Continental Automotive Gmbh | Als Stapel ausgebildetes elektronisches Bauelement |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3806685A (en) * | 1972-10-04 | 1974-04-23 | Chromerics Inc | Linear cam slide switch with guide means and conductive sheet contact |
DE3529341A1 (de) * | 1985-08-16 | 1987-02-19 | Telefunken Electronic Gmbh | Solarzellen-modul |
DE19715488C1 (de) * | 1997-04-14 | 1998-06-25 | Siemens Ag | Piezoaktor mit neuer Kontaktierung und Herstellverfahren |
DE19746988A1 (de) * | 1997-10-24 | 1999-05-06 | Leybold Ag | Zerstäuberkathode |
DE19930585A1 (de) * | 1998-08-06 | 2000-02-10 | Siemens Matsushita Components | Piezoaktor mit verbesserter elektrischer Kontaktierung und Verwendung eines derartigen Piezoaktors |
DE19928187C1 (de) * | 1999-06-19 | 2000-12-28 | Bosch Gmbh Robert | Piezoaktor |
DE19715487C2 (de) * | 1997-04-14 | 2002-06-13 | Siemens Ag | Piezoelektrischer Aktor mit einem Hohlprofil |
WO2003005490A2 (de) * | 2001-06-29 | 2003-01-16 | Siemens Aktiengesellschaft | Weiterkontaktierung für ein piezoelektrisches bauteil in vielschichtbauweise |
DE10236986A1 (de) * | 2002-08-13 | 2004-02-26 | Robert Bosch Gmbh | Piezoaktor |
DE10259949A1 (de) * | 2002-12-20 | 2004-07-01 | Robert Bosch Gmbh | Piezoaktor |
WO2004114424A1 (de) * | 2003-06-24 | 2004-12-29 | Siemens Aktiengesellschaft | Piezoelektrisches bauteil mit elektrischen anschlusselementen und verwendung des bauteils |
WO2005047689A1 (de) * | 2003-11-12 | 2005-05-26 | Siemens Aktiengesellschaft | Kontaktierungsmatte für einen aktor und zugehöriges herstellungsverfahren |
-
2004
- 2004-06-15 DE DE102004028884A patent/DE102004028884A1/de not_active Withdrawn
-
2005
- 2005-03-17 WO PCT/EP2005/051254 patent/WO2005124884A1/de active Application Filing
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3806685A (en) * | 1972-10-04 | 1974-04-23 | Chromerics Inc | Linear cam slide switch with guide means and conductive sheet contact |
DE3529341A1 (de) * | 1985-08-16 | 1987-02-19 | Telefunken Electronic Gmbh | Solarzellen-modul |
DE19715488C1 (de) * | 1997-04-14 | 1998-06-25 | Siemens Ag | Piezoaktor mit neuer Kontaktierung und Herstellverfahren |
DE19715487C2 (de) * | 1997-04-14 | 2002-06-13 | Siemens Ag | Piezoelektrischer Aktor mit einem Hohlprofil |
DE19746988A1 (de) * | 1997-10-24 | 1999-05-06 | Leybold Ag | Zerstäuberkathode |
DE19930585A1 (de) * | 1998-08-06 | 2000-02-10 | Siemens Matsushita Components | Piezoaktor mit verbesserter elektrischer Kontaktierung und Verwendung eines derartigen Piezoaktors |
DE19928187C1 (de) * | 1999-06-19 | 2000-12-28 | Bosch Gmbh Robert | Piezoaktor |
WO2003005490A2 (de) * | 2001-06-29 | 2003-01-16 | Siemens Aktiengesellschaft | Weiterkontaktierung für ein piezoelektrisches bauteil in vielschichtbauweise |
DE10236986A1 (de) * | 2002-08-13 | 2004-02-26 | Robert Bosch Gmbh | Piezoaktor |
DE10259949A1 (de) * | 2002-12-20 | 2004-07-01 | Robert Bosch Gmbh | Piezoaktor |
WO2004114424A1 (de) * | 2003-06-24 | 2004-12-29 | Siemens Aktiengesellschaft | Piezoelektrisches bauteil mit elektrischen anschlusselementen und verwendung des bauteils |
WO2005047689A1 (de) * | 2003-11-12 | 2005-05-26 | Siemens Aktiengesellschaft | Kontaktierungsmatte für einen aktor und zugehöriges herstellungsverfahren |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010040693A1 (de) * | 2008-10-06 | 2010-04-15 | Epcos Ag | Piezoaktor mit aussenelektrode |
JP2012504858A (ja) * | 2008-10-06 | 2012-02-23 | エプコス アクチエンゲゼルシャフト | 外部電極を有する圧電アクチュエータ |
US9214620B2 (en) | 2008-10-06 | 2015-12-15 | Epcos Ag | Piezoelectric actuator with outer electrode |
WO2014198936A1 (de) * | 2013-06-14 | 2014-12-18 | Epcos Ag | Vielschichtbauelement mit einer aussenkontaktierung |
JP2016529688A (ja) * | 2013-06-14 | 2016-09-23 | エプコス アクチエンゲゼルシャフトEpcos Ag | 外部接続部,延長接続部,および結合部材を有する多層デバイス |
US10381543B2 (en) | 2013-06-14 | 2019-08-13 | Epcos Ag | Multi-layer component having an external contact |
CN105814706A (zh) * | 2014-07-18 | 2016-07-27 | 大陆汽车有限公司 | 用于电接触压电叠层的器件以及压电叠层及其制造方法 |
US10153419B2 (en) | 2014-07-18 | 2018-12-11 | Continental Automotive Gmbh | Component for electrically contacting a piezo stack, a piezo stack, and method for producing the same |
Also Published As
Publication number | Publication date |
---|---|
DE102004028884A1 (de) | 2006-01-05 |
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