EP1911052A1 - Electrical component - Google Patents

Electrical component

Info

Publication number
EP1911052A1
EP1911052A1 EP06775776A EP06775776A EP1911052A1 EP 1911052 A1 EP1911052 A1 EP 1911052A1 EP 06775776 A EP06775776 A EP 06775776A EP 06775776 A EP06775776 A EP 06775776A EP 1911052 A1 EP1911052 A1 EP 1911052A1
Authority
EP
European Patent Office
Prior art keywords
electrical component
component according
inner electrode
electrode set
varistor
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.)
Granted
Application number
EP06775776A
Other languages
German (de)
French (fr)
Other versions
EP1911052B1 (en
Inventor
Michael Hirschler
Axel Pecina
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 EP1911052A1 publication Critical patent/EP1911052A1/en
Application granted granted Critical
Publication of EP1911052B1 publication Critical patent/EP1911052B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/18—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material comprising a plurality of layers stacked between terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H01C1/1406—Terminals or electrodes formed on resistive elements having positive temperature coefficient
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H01C1/1413—Terminals or electrodes formed on resistive elements having negative temperature coefficient
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H01C1/146—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors the resistive element surrounding the terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
    • H01C7/021—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient formed as one or more layers or coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/04—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having negative temperature coefficient
    • H01C7/041—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having negative temperature coefficient formed as one or more layers or coatings

Definitions

  • An object to be solved is to specify an electrical component with high current carrying capacity.
  • a base body containing ceramic material in which a first inner electrode set is formed with at least two internal electrodes, which are connected to one another by means of at least one plated-through hole.
  • Such a construction is preferably used for a varistor. Electrical components, such as However, ceramic PTC or NTC devices may also have such a construction. However, the embodiments mentioned below only in connection with a varistor should not be limited to these only.
  • the inner electrode set is connected to an outer contact of the varistor, which is preferably applied to the surface of the base body in the form of a layer.
  • the via or vias can be realized as electrical conductors contained in the ceramic material.
  • metallized bodies are suitable with or without contained in the body, non-metallized space. In this case, hollow-cylindrical plated-through holes are preferred.
  • the plated-through holes make it possible to reduce the electrical series resistance of a plurality of, for example, superposed inner electrodes, since the current can pass from one inner electrode to the next within the basic body without overcoming a space filled with a dielectric.
  • the internal electrodes of the internal electrode set are connected to one another by means of a plurality of through-contacts.
  • the through-contacts can be arranged at equal distances from each other.
  • the varistor preferably has a second set of internal electrodes whose internal electrodes can be acted on by an electrical potential which differs from that of the potential carried by the first set of electrodes.
  • the internal electrodes of the second internal electrode set are likewise connected to one another by means of at least one through-connection.
  • the second inner electrode set has a high current carrying capacity and enjoys the same advantages as the first inner electrode set.
  • the entire second inner electrode set is embedded in the base body.
  • Both internal electrode sets are preferably arranged with the greatest possible distance from one another in mutually opposite base and cover regions of the electrical component.
  • a maximum amount and thickness of ceramic material is secured between the Innelektrodenmentsn, whereby high resistance values of the body can be achieved.
  • External contacts are provided, which are electrically connected to an inner electrode set.
  • the first inner electrode set is connected to a first outer contact and the second inner electrode set is connected to a second outer contact.
  • the varistor is formed only with a single inner electrode set, wherein in addition to an external contact, a single second electrode may be arranged on the surface of the base body or embedded in it.
  • FIG. 1 shows a varistor which contains two inner electrode sets which are identified by plated-through holes.
  • FIG. 1 shows a varistor with a basic body 1, which has a plurality of ceramic-containing layers 3 in a stacked multilayer construction and a plurality of internal electrodes 2.
  • the ceramic layers are cut from green sheets, stacked on top of each other, pressed together and then joined together by means of a sintering process.
  • a suitable main part of the ceramic material is the varistor ceramic zinc oxide (ZnO).
  • the body would preferably be mixed crystals such as Fe 3 O 4 with Zn 2 TiO 4 or MgCrO 4 , Fe 2 O 3 with TiO 2 , NiO or CoO with Li 2 O. exhibit.
  • the main body would preferably contain a ferro-electric mixed ceramic, for example BaTiO 3 or SrTiO 3 .
  • the main body has two inner electrode sets 4 and 5, each having two superimposed internal electrodes 2, which are contacted with three through-contacts 6 electrically to each other.
  • the internal electrode set or the internal electrodes of this set can be subjected to a same electrical potential.
  • the internal electrodes and the plated-through holes preferably contain a silver-palladium (Ag-Pd) alloy.
  • the internal electrodes are preferably applied to the ceramic layers by screen printing.
  • the plated-through holes are punched out and filled under pressure by means of the electrically conductive medium, preferably a paste. Between the vias preferably dielectric, preferably ceramic material is provided.
  • the inner electrode sets 4 and 5 are each contacted with an outer contact 7 applied to the surface of the main body 1, one end of each inner electrode 2 being connected to an outer contact.
  • the external contact preferably contains a galvanic silver layer or a directly solderable silver alloy.
  • the internal electrode sets are embedded in opposite end regions, ie in the base and cover regions of the base body, in order to provide the greatest possible distance between them. Between them is a dielectric path formed by ceramic material free from further internal electrodes. For internal electrodes, which are embedded in the body, no passivation of the varistor is necessary.
  • the internal electrode sets are exposed to different potentials, wherein the varistor at a height of about 3 mm with voltages of up to 275 volts can be acted upon and this dominated safely.
  • the varistor only with an internal electrode set 4 with integrated plated-through holes.
  • a second, individual electrode can be arranged on the opposite surface or in the opposite base or cover region of the base body.
  • the integration of internal electrodes in the ceramic base body is only necessary for the one internal electrode set 4, so that the adjustment of the change in the material state of an internal electrode set is required only once at the required sintering temperature.
  • the application of the second electrode can take place independently of the sintering process, when it is applied to the surface of the base body. It is preferred that a conductive silver is used for the electrode. Since this electrode is not embedded in the basic body, it is preferred that the varistor be passivated by means of glass on its surface.
  • An inner electrode set 4 or 5 may consist of more than two, preferably three inner electrodes 2, wherein on the two surfaces of the central inner electrode through-contacts 6 are provided which contact the adjacent two inner electrodes. It is advantageous if the middle inner electrode is made thicker than the outer two inner electrodes, since the middle inner electrode carries the largest proportion of electricity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Ceramic Engineering (AREA)
  • Thermistors And Varistors (AREA)

Abstract

The invention specifies an electrical component, comprising a basic body (1) which contains ceramic material (3) and in which a plurality of inner electrodes (2) are arranged, wherein at least one first set of inner electrodes (4) is formed by at least two inner electrodes, which are connected to one another by means of at least one through-plating (6).

Description

Beschreibungdescription
Elektrisches BauelementElectrical component
Es wird ein elektrisches Bauelement mit hoher Spannungskapazität beschrieben.An electrical device with high voltage capacity is described.
Aus DE 10146947 B4 und DE 10110680 Al sind elektrische Bauelemente mit Varistorkeramik enthaltende Grundkörper bekannt .DE 10146947 B4 and DE 10110680 A1 disclose electrical components containing varistor ceramic.
Eine zu lösende Aufgabe besteht darin, ein elektrisches Bauelement mit hoher Stromtragfähigkeit anzugeben.An object to be solved is to specify an electrical component with high current carrying capacity.
Gemäß wenigstens einer Ausführungsform eines elektrischen Bauelements ist ein Keramikmaterial enthaltender Grundkörper vorgesehen, in dem ein erster Innenelektrodensatz mit wenigstens zwei Innenelektroden gebildet ist, die mittels wenigstens einer Durchkontaktierung miteinander verbunden sind.According to at least one embodiment of an electrical component, a base body containing ceramic material is provided, in which a first inner electrode set is formed with at least two internal electrodes, which are connected to one another by means of at least one plated-through hole.
Eine solche Konstruktion wird vorzugsweise für ein Varistor verwendet. Elektrische Bauelemente, wie z.B. keramische PTC- oder NTC-Bauelemente, können jedoch auch eine solche Konstruktion aufweisen. Die nachfolgend nur im Zusammenhang mit einem Varistor erwähnten Ausführungsbeispiele sollen jedoch nicht nur auf diesen beschränkt sein.Such a construction is preferably used for a varistor. Electrical components, such as However, ceramic PTC or NTC devices may also have such a construction. However, the embodiments mentioned below only in connection with a varistor should not be limited to these only.
Es ist günstig, wenn der Innenelektrodensatz mit einem Außenkontakt des Varistors verbunden ist, der vorzugsweise an der Oberfläche des Grundkörpers in der Form einer Schicht aufgebracht ist. Die Durchkontaktierung bzw. Vias können als im Keramikmaterial enthaltene, elektrische Leiter realisiert sein. Hierzu eignen sich metallisierte Körper mit oder ohne im Körper enthaltenem, nichtmetallisiertem Raum. Dabei werden hohlzylinderförmige Durchkontaktierungen bevorzugt.It is favorable if the inner electrode set is connected to an outer contact of the varistor, which is preferably applied to the surface of the base body in the form of a layer. The via or vias can be realized as electrical conductors contained in the ceramic material. For this purpose, metallized bodies are suitable with or without contained in the body, non-metallized space. In this case, hollow-cylindrical plated-through holes are preferred.
Mit einem Innenelektrodensatz, dessen Innenelektroden mittels Durchkontaktierungen miteinander verbunden sind, wird die Stromtragfähigkeit des elektrischen Bauelements erhöht, da die übereinander liegende Innenelektroden ein erhöhten Leitervolumen mit reduziertem Widerstand bei gleichbleibenden Querschnitt des Varistors darstellen.With an inner electrode set whose inner electrodes are connected to each other by means of plated-through holes, the current-carrying capacity of the electrical component is increased, since the superimposed inner electrodes represent an increased conductor volume with reduced resistance with the same cross section of the varistor.
Die Durchkontaktierungen ermöglichen die Reduzierung des elektrischen Serienwiderstands mehrerer, beispielsweise übereinander liegender Innenelektroden, da der Strom von einer Innenelektrode zur nächsten innerhalb des Grundkδrpers ohne Überwindung eines mit einem Dielektrikum gefüllten Raum gelangen kann.The plated-through holes make it possible to reduce the electrical series resistance of a plurality of, for example, superposed inner electrodes, since the current can pass from one inner electrode to the next within the basic body without overcoming a space filled with a dielectric.
Es wird bevorzugt, dass die Innenelektroden des Innenelektrodensatzes mittels mehrerer Durchkontakierungen miteinander verbunden werden. Dabei können die Durchkontakierungen in gleichen Abständen voneinander angeordnet sein.It is preferred that the internal electrodes of the internal electrode set are connected to one another by means of a plurality of through-contacts. In this case, the through-contacts can be arranged at equal distances from each other.
Es ist günstig, wenn der ganze Innenelektrodensatz im Grundkörper eingebettet ist. Hierdurch wird er vorteilhafterweise vor äußeren Einflüssen geschützt, sodass keine zusätzliche Schutzschicht nötig ist. Dabei soll jedoch ein Ende einer Innenelektrode mit einem Außenkontakt verbunden sein, sodass lediglich das Ende der Innenelektrode als nicht im Grundkörper eingebettet angesehen werden kann. Der Varistor weist vorzugsweise einen zweiten Innenelektrodensatz auf, dessen Innenelektroden mit einem elektrischen Potential beaufschlagbar sind, der sich von dem des vom ersten Elektrodensatz getragenem Potential unterscheidet. Die Innenelektroden des zweiten Innenelektrodensatzes sind ebenfalls mittels mindestens einer Durchkontaktierung miteinander verbunden. Der zweite Innenelektrodensatz weist eine hohe Stromtragfähigkeit auf und genießt diesselben Vorteile wie der erste Innenelektrodensatz .It is favorable if the entire inner electrode set is embedded in the main body. As a result, it is advantageously protected from external influences, so that no additional protective layer is necessary. However, one end of an inner electrode should be connected to an outer contact, so that only the end of the inner electrode can not be regarded as being embedded in the main body. The varistor preferably has a second set of internal electrodes whose internal electrodes can be acted on by an electrical potential which differs from that of the potential carried by the first set of electrodes. The internal electrodes of the second internal electrode set are likewise connected to one another by means of at least one through-connection. The second inner electrode set has a high current carrying capacity and enjoys the same advantages as the first inner electrode set.
Auch hier ist es günstig, wenn der gesamte zweite Innenelektrodensatz im Grundkörper eingebettet ist.Again, it is advantageous if the entire second inner electrode set is embedded in the base body.
Beide Innenelektrodensätze werden vorzugsweise mit dem größtmöglichen Abstand voneinander in sich gegenüberliegende Grund- und Deckbereiche des elektrischen Bauelements angeordnet . Damit wird eine maximale Menge und Dicke an keramischem Material zwischen den Innelektrodensätzen gesichert, wodurch hohe Widerstandswerte des Grundkörpers erreichbar sind.Both internal electrode sets are preferably arranged with the greatest possible distance from one another in mutually opposite base and cover regions of the electrical component. Thus, a maximum amount and thickness of ceramic material is secured between the Innelektrodensätzen, whereby high resistance values of the body can be achieved.
Es sind Außenkontakte vorgesehen, welche mit einem Innenelektrodensatz elektrisch verbunden sind. Dabei wird der erste Innenelektrodensatz mit einem ersten Außenkontakt und der zweite Innenelektrodensatz mit einem zweiten Außenkontakt verbunden .External contacts are provided, which are electrically connected to an inner electrode set. In this case, the first inner electrode set is connected to a first outer contact and the second inner electrode set is connected to a second outer contact.
Eine besonders handliche und- kompakte Bauform wird durch die Anordnung von Außenkontakten an der Oberfläche des Grundkörpers gewährleistet, wobei in diesem Falle die Außenankontakte bevorzugt als Kontaktschichten realisiert werden.A particularly handy and compact design is ensured by the arrangement of external contacts on the surface of the body, in which case the Außenankontakte preferred to be realized as contact layers.
Gemäß einer weiteren Ausführungsform wird der Varistor lediglich mit einem einzigen Innenelektrodensatz ausgebildet, wobei neben einem Außenkontakt eine einzelne zweite Elektrode, an der Oberfläche des Grundkörpers oder in ihr eingebettet angeordnet sein kann.According to a further embodiment, the varistor is formed only with a single inner electrode set, wherein in addition to an external contact, a single second electrode may be arranged on the surface of the base body or embedded in it.
Die beschriebenen Gegenstände werden anhand der folgenden Figur und Ausführungsbeispiele näher erläutert .The objects described will be explained in more detail with reference to the following figure and embodiments.
Dabei zeigt :Showing:
Figur 1 einen Varistor, der zwei mit Durchkontaktierungen gekennzeichnete Innenelektrodensätze enthält.FIG. 1 shows a varistor which contains two inner electrode sets which are identified by plated-through holes.
In Figur 1 ist ein Varistor mit einem Grundkörper 1 dargestellt, der mehrere Keramik enthaltende Schichten 3 in einer gestapelten Vielschichtbauweise sowie mehrere Innenelektroden 2 aufweist. Die keramischen Schichten werden aus Grünfolien geschnitten, übereinander gestapelt, zusammengepresst und anschließend anhand eines Sintervorgangs miteinander verbunden. Ein geeigneter Hauptanteil des keramischen Materials ist dabei die Varistorkeramik Zinkoxid (ZnO) .FIG. 1 shows a varistor with a basic body 1, which has a plurality of ceramic-containing layers 3 in a stacked multilayer construction and a plurality of internal electrodes 2. The ceramic layers are cut from green sheets, stacked on top of each other, pressed together and then joined together by means of a sintering process. A suitable main part of the ceramic material is the varistor ceramic zinc oxide (ZnO).
Wenn die obigen Konstruktion für ein beispielsweise scheibenförmig hergestelltes NTC-Bauelement verwendet werden soll, würde der Grundkörper vorzugsweise Mischkristalle wie beispielsweise Fe3O4 mit Zn2TiO4 oder MgCrO4, Fe2O3 mit TiO2, NiO oder CoO mit Li2O aufweisen. Wenn dagegen ein PTC-Bauelement von der genannten Konstruktion profitieren soll, würde der Grundkörper vorzugsweise eine ferroelektische Mischkeramik, beispielsweise BaTiO3 oder SrTiO3 enthalten.If the above construction is to be used for a disk-shaped NTC device, for example, the body would preferably be mixed crystals such as Fe 3 O 4 with Zn 2 TiO 4 or MgCrO 4 , Fe 2 O 3 with TiO 2 , NiO or CoO with Li 2 O. exhibit. On the other hand, if a PTC device is to benefit from the above construction, the main body would preferably contain a ferro-electric mixed ceramic, for example BaTiO 3 or SrTiO 3 .
Der Grundkörper weist zwei Innenelektrodensätze 4 und 5 auf, die jeweils zwei übereinander angeordnete Innenelektroden 2 aufweisen, die mit drei Durchkontakierungen 6 elektrisch miteinander kontaktiert sind. Dabei kann der Innenelektrodensatz bzw. können die Innenelektroden dieses Satzes mit einem gleichen elektrischen Potential beaufschlagt werden. Die Innenelektroden sowie die Durchkontaktierungen enthalten vorzugsweise eine Silber-Palladium (Ag-Pd) Legierung. Die Innenelektroden werden vorzugsweise mittels Siebdrucken auf die keramischen Schichten aufgebracht . Die Durchkontaktierungen werden ausgestanzt und mittels des elektrisch leitenden Mediums, vorzugsweise eine Paste, unter Druck gefüllt. Zwischen den Durchkontaktierungen ist vorzugsweise dielektrisches, vorzugsweise keramisches Material vorgesehen.The main body has two inner electrode sets 4 and 5, each having two superimposed internal electrodes 2, which are contacted with three through-contacts 6 electrically to each other. In this case, the internal electrode set or the internal electrodes of this set can be subjected to a same electrical potential. The internal electrodes and the plated-through holes preferably contain a silver-palladium (Ag-Pd) alloy. The internal electrodes are preferably applied to the ceramic layers by screen printing. The plated-through holes are punched out and filled under pressure by means of the electrically conductive medium, preferably a paste. Between the vias preferably dielectric, preferably ceramic material is provided.
Die Innenelektrodensätze 4 und 5 sind jeweils mit einem an der Oberfläche des Grundkörpers 1 aufgebrachten Außenkontakt 7 kontaktiert, wobei ein Ende jeder Innenelektrode 2 mit einem Außenkontakt verbunden ist. Der Außenkontakt enthält vorzugsweise eine galvanische Silberschicht oder eine direkt lötbare Silberlegierung.The inner electrode sets 4 and 5 are each contacted with an outer contact 7 applied to the surface of the main body 1, one end of each inner electrode 2 being connected to an outer contact. The external contact preferably contains a galvanic silver layer or a directly solderable silver alloy.
Die Innenelektrodensätze sind in gegenüberliegenden Endbereichen, d.h. in den Grund- und Deckbereichen des Grundkδrpers eingebettet um einen möglichst großen Abstand zwischen ihnen zu verschaffen. Zwischen ihnen ist dabei ein durch keramisches Material gebildeter dielektrischer Pfad frei von weiteren Innenelektroden vorhanden. Bei Innenelektroden, welche im Grundkörper eingebettet sind, ist keine Passivierung des Varistors nötig.The internal electrode sets are embedded in opposite end regions, ie in the base and cover regions of the base body, in order to provide the greatest possible distance between them. Between them is a dielectric path formed by ceramic material free from further internal electrodes. For internal electrodes, which are embedded in the body, no passivation of the varistor is necessary.
Die Innenelektrodensätze werden unterschiedlichen Potentialen ausgesetzt, wobei der Varistor bei einer Bauhöhe von ca. 3 mm mit Spannungen von bis zu 275 Volt beaufschlagbar ist und diese sicher beherrscht .The internal electrode sets are exposed to different potentials, wherein the varistor at a height of about 3 mm with voltages of up to 275 volts can be acted upon and this dominated safely.
Aus herstellungstechnischen Gründen kann es günstig sein, den Varistor lediglich mit einem Innenelektrodensatz 4 mit integrierten Durchkontaktierungen auszubilden. Dabei kann eine zweite, einzelne Elektrode an der gegenüberliegenden Oberfläche oder im gegenüberliegenden Grund- oder Deckbereich des Grundkörpers angeordnet sein. Hierdurch ist das Integrieren von Innenelektroden im keramischen Grundkörper nur für den einen Innenelektrodensatz 4 nötig, sodass die Abstimmung der Veränderung des Materialzustands eines Innenelektrodensatzes bei benötigter Sintertemperatur nur einmal erforderlich ist. Das Aufbringen der zweiten Elektrode kann dabei unabhängig vom Sintervorgang erfolgen, wenn sie an der Oberfläche des Grundkörpers aufgebracht wird. Dabei wird bevorzugt, dass für die Elektrode ein Leitsilber verwendet wird. Da diese Elektrode nicht im Grundkδrper eingebettet ist, wird bevorzugt, dass der Varistor mittels Glas an seiner Oberfläche passiviert wird.For manufacturing reasons, it may be favorable to design the varistor only with an internal electrode set 4 with integrated plated-through holes. In this case, a second, individual electrode can be arranged on the opposite surface or in the opposite base or cover region of the base body. As a result, the integration of internal electrodes in the ceramic base body is only necessary for the one internal electrode set 4, so that the adjustment of the change in the material state of an internal electrode set is required only once at the required sintering temperature. The application of the second electrode can take place independently of the sintering process, when it is applied to the surface of the base body. It is preferred that a conductive silver is used for the electrode. Since this electrode is not embedded in the basic body, it is preferred that the varistor be passivated by means of glass on its surface.
Ein Innenelektrodensatz 4 oder 5 kann aus mehr als zwei, vorzugsweise aus drei Innenelektroden 2 bestehen, wobei an den beiden Oberflächen der mittleren Innenelektrode Durchkontakierungen 6 vorgesehen sind, die die benachbarten beiden Innenelektroden kontaktieren. Dabei ist es günstig, wenn die mittlere Innenelektrode dicker ausgebildet ist, als die äußeren beiden Innenelektroden, da die mittlere Innenelektrode den größten Stromanteil trägt. Mittels eines aus drei oder mehr Innenelektroden 2 gebildeten Innenelektrodensatzes kann eine noch höhereAn inner electrode set 4 or 5 may consist of more than two, preferably three inner electrodes 2, wherein on the two surfaces of the central inner electrode through-contacts 6 are provided which contact the adjacent two inner electrodes. It is advantageous if the middle inner electrode is made thicker than the outer two inner electrodes, since the middle inner electrode carries the largest proportion of electricity. By means of an inner electrode set formed from three or more inner electrodes 2, an even higher
Stromtragfähigkeit des Varistors realisiert werden, wobei die Dicke des zwischen den Innenelektrodensätzen befindlichen Keramikstapels erhöht werden kann, um den reduzierten Abstand zwischen den sich gegenüberliegenden Innenelektrodensätzen auszugleichen. Dies hätte eine größere Bauhöhe des Varistors zur Folge, jedoch wäre dies bei manchen Anwendungen tolerierbar, wie zum Beispiel bei noch höheren Spannungsklassen bis 600 V. Current carrying capacity of the varistor can be realized, wherein the thickness of the ceramic stack located between the Innenelektrodensätzen can be increased to compensate for the reduced distance between the opposing Innenelektrodensätzen. This would result in a larger overall height of the varistor, but this would be tolerable in some applications, such as at even higher voltage classes up to 600 V.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Grundkörper eines elektrischen Bauelements1 main body of an electrical component
2 Innenelektrode2 inner electrode
3 keramische Schicht3 ceramic layer
4 erster Innenelektrodensatz4 first inner electrode set
5 zweiter Innenelektrodensatz5 second inner electrode set
6 Durchkontaktierung6 via
7 Außenkontakt 7 external contact

Claims

- S -Patentansprüche - S patent claims
1. Elektrisches Bauelement, umfassend einen Keramikmaterial (3) enthaltenden Grundkörper (1) , in dem ein erster1. An electrical component, comprising a ceramic material (3) containing basic body (1), in which a first
Innenelektrodensatz (4) mit wenigstens zwei Innenelektroden (2) gebildet ist, die mittels wenigstens einerInner electrode set (4) with at least two internal electrodes (2) is formed by at least one
Durchkontaktierung (6) miteinander verbunden sind.Through-connection (6) are interconnected.
2. Elektrisches Bauelement nach Anspruch 1, der einen zweiten Innenelektrodensatz (5) umfasst, dessen Innenelektroden (2) mittels wenigstens einer Durchkontaktierung (6) miteinander verbunden sind.2. Electrical component according to claim 1, which comprises a second inner electrode set (5), the inner electrodes (2) by means of at least one through-connection (6) are interconnected.
3. Elektrisches Bauelement nach einem der Ansprüche 1 oder 2, bei dem zwischen den Innenelektroden (2) eines Innenelektrodensatzes (4,5) Keramikmaterial (3) vorhanden ist .3. Electrical component according to one of claims 1 or 2, wherein between the inner electrodes (2) of an inner electrode set (4,5) ceramic material (3) is present.
4. Elektrisches Bauelement nach einem der vorhergehenden Ansprüche, bei dem die Innenelektroden (2) eines Innenelektrodensatzes (4,5) mittels mehrerer Durchkontaktierungen (6) miteinander verbunden sind.4. Electrical component according to one of the preceding claims, wherein the internal electrodes (2) of an internal electrode set (4,5) by means of a plurality of plated-through holes (6) are interconnected.
5. Elektrisches Bauelement nach einem der Ansprüche 2 bis5. Electrical component according to one of claims 2 to
4, bei dem die Innenelektrodensätze (4,5) in gegenüberliegenden Grund- und Deckbereichen des Grundkörpers4, wherein the inner electrode sets (4,5) in opposite ground and cover areas of the body
(1) angeordnet sind.(1) are arranged.
6. Elektrisches Bauelement nach einem der Ansprüche 2 bis6. Electrical component according to one of claims 2 to
5, bei dem zwischen den Innenelektrodensätzen (4,5) der Grundkörper (1) frei von Innenelektroden ist. 5, in which between the inner electrode sets (4,5) of the base body (1) is free of internal electrodes.
7. Elektrisches Bauelement nach einem der vorhergehenden Ansprüche, bei dem der Grundkörper (1) einen Stapel aus Keramikschichten (3) umfasst .7. Electrical component according to one of the preceding claims, wherein the base body (1) comprises a stack of ceramic layers (3).
8. Elektrisches Bauelement nach einem der vorhergehenden Ansprüche, der wenigstens einen Außenkontakt (7) umfasst, wobei jeder Innenelektrodensatz (4, 5) mit einem Außenkontakt elektrisch verbunden ist.8. Electrical component according to one of the preceding claims, comprising at least one external contact (7), wherein each internal electrode set (4, 5) is electrically connected to an external contact.
9. Elektrisches Bauelement nach Anspruch 8, bei dem der Außenkontakt (7) an der Oberfläche des Grundkörpers (1) angeordnet ist.9. Electrical component according to claim 8, wherein the outer contact (7) on the surface of the base body (1) is arranged.
10. Elektrisches Bauelement nach einem der vorhergehenden Ansprüche, das ein Varistor ist, wobei der Grundkδrper (1) eine Varistorkeramik enthält.10. Electrical component according to one of the preceding claims, which is a varistor, wherein the Grundkδrper (1) contains a varistor ceramic.
11. Elektrisches Bauelement nach einem der vorhergehenden Ansprüche, das ein NTC- oder ein PTC-Bauelement ist, wobei der Grundkörper (1) jeweils eine NTC- oder eine PTC-Keramik enthält . 11. Electrical component according to one of the preceding claims, which is an NTC or a PTC component, wherein the base body (1) each containing a NTC or a PTC ceramic.
EP06775776.5A 2005-08-01 2006-07-31 Electrical component Active EP1911052B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510036102 DE102005036102A1 (en) 2005-08-01 2005-08-01 Electrical component
PCT/DE2006/001335 WO2007014550A1 (en) 2005-08-01 2006-07-31 Electrical component

Publications (2)

Publication Number Publication Date
EP1911052A1 true EP1911052A1 (en) 2008-04-16
EP1911052B1 EP1911052B1 (en) 2016-12-07

Family

ID=37401173

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06775776.5A Active EP1911052B1 (en) 2005-08-01 2006-07-31 Electrical component

Country Status (3)

Country Link
EP (1) EP1911052B1 (en)
DE (1) DE102005036102A1 (en)
WO (1) WO2007014550A1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5075665A (en) * 1988-09-08 1991-12-24 Murata Manufacturing Co., Ltd. Laminated varistor
JP2000068149A (en) * 1998-08-25 2000-03-03 Murata Mfg Co Ltd Laminated electronic component and manufacture therefor
DE19903456A1 (en) * 1999-01-28 2000-08-10 Philips Corp Intellectual Pty Multi-component component
JP3632592B2 (en) * 1999-11-18 2005-03-23 株式会社村田製作所 Chip thermistor and manufacturing method thereof
JP4332634B2 (en) * 2000-10-06 2009-09-16 Ｔｄｋ株式会社 Multilayer electronic components
DE10110680A1 (en) * 2001-03-06 2002-10-02 Epcos Ag Electrical component
DE10313891A1 (en) * 2003-03-27 2004-10-14 Epcos Ag Electrical multilayer component

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007014550A1 *

Also Published As

Publication number Publication date
EP1911052B1 (en) 2016-12-07
WO2007014550A1 (en) 2007-02-08
DE102005036102A1 (en) 2007-02-08

Similar Documents

Publication Publication Date Title
EP0103748B1 (en) Combined circuit with varistor
EP2174328B1 (en) Multilayer electrical component with a resistor and a decoupling layer
EP2201585B1 (en) Electric multilayer component
EP2143117B1 (en) Electric multi-layer component with electrically non-contacted protective structure
EP2306470B1 (en) Electrical Component
EP1606831B1 (en) Electric multilayer component
EP2394275B1 (en) Electrical multilayered component
EP1369880B1 (en) Electrical multilayer component and circuit arrangement
EP2104941B1 (en) Electric component and external contact of an electric component
DE112020002054T5 (en) INTEGRATED COMPONENT, COMPRISING A CAPACITOR AND INDEPENDENT VARISTOR
EP1369881B1 (en) Electrical multilayer component
DE102004010001A1 (en) Electrical component comprises a stack of ceramic layers which form a base member, electrode layers, and a phase pushing unit
DE102004016146B4 (en) Electrical multilayer component
EP1911052B1 (en) Electrical component
EP1024593B1 (en) Multi-component mounting part
EP2191483B1 (en) Electrical multilayer component
DE10134751C1 (en) Electrical component used as a varistor has a base body with regions of ceramic material and contact layers
DE102004029411B4 (en) Ceramic multilayer capacitor for low and medium range voltages has a flat ceramic main body, overlapping electrodes and electric outer contacts

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20071228

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 20080619

DAX Request for extension of the european patent (deleted)
RBV Designated contracting states (corrected)

Designated state(s): DE FR GB

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20160712

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

RIN1 Information on inventor provided before grant (corrected)

Inventor name: PECINA, AXEL

Inventor name: HIRSCHLER, MICHAEL

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502006015275

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502006015275

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20170908

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20170731

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20180330

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170731

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502006015275

Country of ref document: DE

Representative=s name: EPPING HERMANN FISCHER PATENTANWALTSGESELLSCHA, DE

Ref country code: DE

Ref legal event code: R081

Ref document number: 502006015275

Country of ref document: DE

Owner name: TDK ELECTRONICS AG, DE

Free format text: FORMER OWNER: EPCOS AG, 81669 MUENCHEN, DE

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230521

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20230725

Year of fee payment: 18