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WO2014184011A1 - Composant multicouche doté d'une mise en contact électrique extérieure - Google Patents

Composant multicouche doté d'une mise en contact électrique extérieure Download PDF

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Publication number
WO2014184011A1
WO2014184011A1 PCT/EP2014/059001 EP2014059001W WO2014184011A1 WO 2014184011 A1 WO2014184011 A1 WO 2014184011A1 EP 2014059001 W EP2014059001 W EP 2014059001W WO 2014184011 A1 WO2014184011 A1 WO 2014184011A1
Authority
WO
WIPO (PCT)
Prior art keywords
wires
sacrificial
main
multilayer component
component according
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
Application number
PCT/EP2014/059001
Other languages
German (de)
English (en)
Inventor
Franz Rinner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDK Electronics AG
Original Assignee
Epcos AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Epcos AG filed Critical Epcos AG
Publication of WO2014184011A1 publication Critical patent/WO2014184011A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • H10N30/80—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
    • H10N30/50—Piezoelectric or electrostrictive devices having a stacked or multilayer structure
    • H10N30/508—Piezoelectric or electrostrictive devices having a stacked or multilayer structure adapted for alleviating internal stress, e.g. cracking control layers
    • 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
    • H10N30/01—Manufacture or treatment
    • H10N30/05—Manufacture of multilayered piezoelectric or electrostrictive devices, or parts thereof, e.g. by stacking piezoelectric bodies and electrodes
    • H10N30/053—Manufacture of multilayered piezoelectric or electrostrictive devices, or parts thereof, e.g. by stacking piezoelectric bodies and electrodes by integrally sintering piezoelectric or electrostrictive bodies and electrodes

Definitions

  • the component is a piezoelectric actuator that can be used to actuate an injection valve in a motor vehicle.
  • a multilayer capacitor or a multilayer the Dahlbaue ⁇ lement example may be varistor.
  • the multilayer component a Grundkör ⁇ by having a stack of dielectric layers and internal electrode layers.
  • the multilayer component also has an external contact with main wires and sacrificial wires, wherein the main wires have a higher extensibility than the sacrificial wires.
  • Extensibility is the ability of a body to change its shape under the action of force. Extensibility indicates how far a body can be stretched without it tearing or breaking.
  • the main wires and the sacrificial wires are stretchable up to a certain voltage in Sta ⁇ pelraum.
  • the higher extensibility of the main wires means that the Main wires endure a stronger deformation of the layer stack than the sacrificial wires.
  • the sacrificial wires can be selected according to technical process requirements.
  • the sacrificial wires may for example comprise a ferromagnetic material or consist of a ferromagnetic material. Due to the ferromagnetic properties, the external contact can be fixed to a carrier during production of the multilayer component without slippage. This makes it possible to dispense with the use of a particularly sticky flux. As a result, residues and Ver ⁇ dirt on the external contact can be avoided.
  • the external contacts are preferably fabric or sieve-like design ⁇ . Such external contacts have a small footprint.
  • the dielectric layers and the internal electrode layers are stacked along a stacking direction.
  • the stacking direction preferably corresponds to the longitudinal direction of the main body.
  • the dielektri ⁇ rule layers and the internal electrode layers are stacked alternately.
  • the dielectric layers may comprise a piezoelectric material.
  • the dielectric layers may comprise a ceramic material, in particular a piezoceramic material.
  • a metal paste is applied.
  • the metal paste is applied in a screen printing process. After the application of the metal paste films are preferably stacked, pressed and sintered together, so that arises ⁇ a monolithic sintered body.
  • the main body of the component is preferably formed by a monolithic sintered body, for example by a sintered body produced as described above.
  • the multilayer component is designed as a piezoelectric component , for example as a piezoelectric actuator.
  • a piezoelectric actuator when a voltage is applied to the internal electrode layers, piezoelectric layers are arranged between the internal electrode layers, so that a stroke of the piezoactuator is generated.
  • the Dahlbauele ⁇ ment can also be embodied as another component, such as a multilayer capacitor.
  • the external contact preferably serves to apply a voltage between internal electrode layers adjacent in the stacking direction.
  • two outer contacts are arranged on opposite outer sides of the base body.
  • the internal electrode layers are alternately electrically connected in the stacking direction with one of the external contacts and electrically insulated from the other external contact.
  • the electrode paste that Elect ⁇ clear layers seen in a stacking direction alternately extend to an outer side of the stack and are spaced from the opposite outer side of the stack. To this way, the electrode layers can alternately be electrically connected to one of the outer contacts.
  • the multilayer component may be a fully active multilayer component.
  • the internal electrode layers extend over the entire cross section of the base body.
  • the internal electrode layers on one outer side are covered alternately with electrically insulating material.
  • the internal electrode layers are alternately electrically connected in the stacking direction with one of the external contacts and electrically insulated from the other external contact.
  • the main wires have a larger diameter than the sacrificial wires.
  • the sacrificial wires For example, is the
  • Diameter of the main wires at least twice as large as the diameter of the sacrificial wires.
  • the main wires are e.g. a diameter of 70ym.
  • the sacrificial wires have e.g. a diameter of 30ym.
  • the main wires and the sacrificial wires differ in material.
  • the main wires to a material which has a higher stretch ⁇ ability than the material of the sacrificial wires.
  • the main wires and the sacrificial wires can alswei ⁇ sen a metallic material or consist of a metallic material.
  • the main wires may comprise or consist of grade 1.4201 or 1.4310 stainless steel.
  • the sacrificial wires can have a ferromagnetic material or consist of a ferromagnetic material.
  • the victim wires Grade 1.0340 steel or made of grade 1.0340 steel.
  • the materials of the main wires and the sacrificial wires can be plated.
  • a coating can be applied which contains copper, silver and tin. This coating is used for the solderability of the external contact.
  • the ferromagnetic properties of the external contact, in particular the sacrificial wires can serve in the soldering process of ren ⁇ fixed gear of the wire mesh.
  • the main wires and the sacrificial wires can be deformed to varying degrees during operation.
  • main wires and sacrificial wires can be deformed to different degrees.
  • This main wires and victim wires are differentially biased me ⁇ mechanically.
  • the thicker main wires are not or only slightly deformed. This allows the main wires to ensure a reliable via.
  • the sacrificial wires are intended to rupture when exceeding a certain voltage in the victim wires.
  • the sacrificial wires tear at an elongation of about 1 per thousand. At a higher strain sets the plastic deformation, so that the sacrificial wires easily tear at a repeated expansion of the piezo stack.
  • the main wires and the sacrificial wires preferably intersect at an angle of 90 °.
  • the base body has at least one predetermined breaking point which has a lower Bruchfestig ⁇ ness compared to other areas of the body.
  • the sacrificial wires are preferably intended to tear during the operation of the multilayer component along the at least one predetermined breaking point.
  • cracks can spread in a targeted manner during operation of the multilayer component or during the poling of the multilayer component. As a result, reliable operation of the multilayer component can be ensured. In particular, an uncontrolled Ausbrei ⁇ tion of cracks, which can lead to a failure of the device pier ⁇ ren, be avoided.
  • the sacrificial wires are designed to tear during operation along the at least one predetermined breaking layer.
  • the main wires By the main wires, a reliable current flow across the at least one predetermined breaking point can ignore ensured ⁇ the. Between two predetermined breaking layers, the current can be transmitted through the main wires and sacrificial wires.
  • the sacrificial wires may be at an angle of at least one predetermined breaking layer
  • solder can fix the external contact on the main body.
  • the contact between the main wires can also be ensured by the solder.
  • FIG. 1 shows a side view of the main body
  • FIG. 2 shows a side view of a multilayer component with an external contact
  • Figure 3 is a side view of another multilayer construction ⁇ elements with an external contact.
  • first internal electrode layers 3a and second internal electrode layers 3b are arranged alternately along a stacking direction S.
  • the internal electrode layers 3b ⁇ are not visible in this side view, shown per ⁇ but dashed for clarity.
  • the first internal electrode layers 3a extend up to a first outer side of the main body.
  • the second internal electrode layers extend up to a second outer side of the main body, which lies opposite the first outer side of the main body 1.
  • Figure 2 shows a multilayer component in a seean ⁇ view.
  • the main body 1 of the multilayer component may be formed as shown in FIG.
  • the internal electrode layers 3a, 3b are not shown in FIGS. 2 and 3 for reasons of clarity.
  • the main body 1 has a plurality of predetermined breaking layers 6.
  • the predetermined breaking layers 6 have a reduced breaking strength compared with other regions of the main body 1. Along the predetermined breaking layers 6 cracks can spread in a targeted manner during operation or polarization of the component.
  • an external contact 4a is arranged on the outside of the main body 1 .
  • the external contact 4a serves for contacting the internal electrode layers 3a.
  • a further external contact 4b (not shown) is arranged, which contacts the internal electrode layers 3b.
  • the external contacts 4a, 4b are formed in the form of a wire turn ⁇ esp.
  • Each external contact 4a, 4b has main ⁇ wires 5a and 5b sacrificial wires.
  • the main wires 5a each run parallel to each other.
  • the sacrificial wires 5b run up ⁇ if parallel.
  • the sacrificial wires 5b cross the main wires 5a at an angle of 90 °.
  • the main wires 5a form the weft wire of the fabric and the sacrificial wires 5b form the warp wire of the fabric or vice versa.
  • warp wire refers to the wires in longitudinal direction, and as a weft wire called the wires in the transverse direction.
  • the main wires 5a differ in their extensibility from the sacrificial wires 5b.
  • the main wires 5a have a higher extensibility than the sacrificial wires 5b.
  • the hö ⁇ here extensibility of the main wires 5a is achieved by a different diameter for the main wires 5a, for example, a different material or a different crossing angle chosen relative to the sta- pelebenen.
  • the main wires 5a may also differ from the sacrificial wires 5b in other material properties.
  • the main wires 5a and the sacrificial wires 5b are deformed to different degrees during the operation of the component and mechanically biased.
  • the sacrificial wires 5b ver ⁇ formed.
  • the sacrificial wires 5b tear and are virtually geop ⁇ fert.
  • the sacrificial wires 5b are designed to tear along the predetermined breaking layers 6 during operation.
  • the main wires 5a then ensure a reliable contact of the multilayer component even after complete tearing of the sacrificial wires 5b.
  • the outer electrode shown in Figure 2 has a Orientie ⁇ tion of 45 °.
  • the main wires 5a and 5b Op ⁇ ferdrähte an angle of 45 ° with a plane of stacking a ⁇ close.
  • the main wires 5a and the sacrificial wires 5b make an angle of 45 ° with the predetermined breaking layers 6.
  • a sufficient number of main wires 5a intersect a predetermined breaking layer 6.
  • an electric current can reliably flow over the predetermined breaking layers 6.
  • the current through the main wires 5a and the sacrificial wires 5b is reliably transmitted.
  • the stress between the main wires 5a and the sacrificial wires 5b can be shifted.
  • the load on the sacrificial wires 5b is proportional to sin 2 (), the angle being between a sacrificial wire 5b and a predetermined breaking point 6.
  • Figure 3 shows for example a multilayer element in which the Op ⁇ ferdrähte 5b form an angle of 60 ° with the predetermined breaking layers.
  • the load for the sacrificial wires 5b is increased by about 50% with respect to an angle of 45 °, and lowered by about 50% for the main wires 5a.
  • the angle between the victim wires should be 5b and the
  • Predetermined breaking layers 6 should not be too large, since otherwise only a few main wires 5a cross the predetermined breaking point 6. This could affect the reliability of the contact.
  • the main wires 5a and the sacrificial wires 5b may be galvanized.
  • the main wires 5a and sacrificial wires 5b may have a coating containing copper, silver and tin.
  • the coating may already contain the solder, so that an additional Lot ⁇ layer on the base body 1 is not necessary.
  • a sufficient amount of tin can be deposited to solder the external contact 4a, 4b on the main wires 5a and the sacrificial wires 5b.
  • the ferromagnetic sacrificial wires 5b can serve to fix the tissue during the soldering process.

Landscapes

  • Insulated Conductors (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

L'invention concerne un composant multicouche présentant un corps de base (1) doté d'un empilement de couches diélectriques (2) et de couches électrode interne (3a, 3b). Le composant multicouche présente également une mise en contact électrique extérieure (4a, 4b) dotée de câbles principaux (5a) et de câbles sacrificiels (5b), les câbles principaux (5a) présentant une dilatation supérieure à celle des câbles sacrificiels (5b). L'invention concerne également un élément multicouche, les câbles principaux (5a) présentant un diamètre supérieur à celui des câbles sacrificiels (5b). Fig. 2 : nothing to translate
PCT/EP2014/059001 2013-05-14 2014-05-02 Composant multicouche doté d'une mise en contact électrique extérieure Ceased WO2014184011A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013104955.9A DE102013104955A1 (de) 2013-05-14 2013-05-14 Vielschichtbauelement mit einer Außenkontaktierung
DE102013104955.9 2013-05-14

Publications (1)

Publication Number Publication Date
WO2014184011A1 true WO2014184011A1 (fr) 2014-11-20

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PCT/EP2014/059001 Ceased WO2014184011A1 (fr) 2013-05-14 2014-05-02 Composant multicouche doté d'une mise en contact électrique extérieure

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DE (1) DE102013104955A1 (fr)
WO (1) WO2014184011A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1179860A1 (fr) * 2000-08-09 2002-02-13 Piezomechanik GmbH Contact pour actionneurs piézoélectriques
US20020043901A1 (en) * 2000-12-28 2002-04-18 Noriaki Kihara Multilayer-type piezoelectric actuator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0661293A (ja) * 1992-08-11 1994-03-04 Nippon Steel Corp 半導体装置
DE102006057178A1 (de) * 2006-12-03 2008-06-05 Waldemar Hoening Ohg Netz
JP2009130194A (ja) * 2007-11-26 2009-06-11 Ngk Spark Plug Co Ltd 積層型圧電アクチュエータ素子
DE102011015219B4 (de) * 2010-03-30 2020-09-24 Waldemar Hoening Ohg Verlötbare Elektrode und Verfahren zur Herstellung einer verlötbaren Elektrode

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1179860A1 (fr) * 2000-08-09 2002-02-13 Piezomechanik GmbH Contact pour actionneurs piézoélectriques
US20020043901A1 (en) * 2000-12-28 2002-04-18 Noriaki Kihara Multilayer-type piezoelectric actuator

Also Published As

Publication number Publication date
DE102013104955A1 (de) 2014-11-20

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