EP1911052B1 - Composant electrique - Google Patents

Composant electrique Download PDF

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Publication number
EP1911052B1
EP1911052B1 EP06775776.5A EP06775776A EP1911052B1 EP 1911052 B1 EP1911052 B1 EP 1911052B1 EP 06775776 A EP06775776 A EP 06775776A EP 1911052 B1 EP1911052 B1 EP 1911052B1
Authority
EP
European Patent Office
Prior art keywords
electrical component
inner electrodes
main body
component according
ceramic
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.)
Active
Application number
EP06775776.5A
Other languages
German (de)
English (en)
Other versions
EP1911052A1 (fr
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
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Filing date
Publication date
Application filed by Epcos AG filed Critical Epcos AG
Publication of EP1911052A1 publication Critical patent/EP1911052A1/fr
Application granted granted Critical
Publication of EP1911052B1 publication Critical patent/EP1911052B1/fr
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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

  • DE 10146947 B4 and DE 10110680 A1 are known electrical components containing varistor ceramic body.
  • WO 2004/086432 A1 is an electrical multilayer component with a plurality of electrode stacks known, which are contacted by means of vias with solder balls.
  • 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 adjacent inner electrodes, which are interconnected by means of a plurality of plated-through holes and which are connected at one end to an outer contact.
  • Such a construction is preferably used for a varistor.
  • electrical components such as ceramic PTC or NTC devices, may also have such a construction.
  • 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 main 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.
  • 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, superimposed internal electrodes, since the current can pass from one inner electrode to the next within the main 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 a varistor with a base body 1 is shown, 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 body would preferably contain a ferroelectric multilayer ceramic such as 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 main body, it is preferred that the varistor be passivated by means of glass on its surface.
  • An inner electrode set 4 or 5 can consist of more than two, preferably of three, inner electrodes 2, wherein on the two surfaces of the middle 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)

Claims (11)

  1. Composant électrique, comprenant un corps de base (1) contenant un matériau céramique (3) dans lequel est formé un premier ensemble d'électrodes internes (4) comportant au moins deux électrodes internes (2), caractérisé en ce que deux électrodes internes voisines sont connectées l'une à l'autre au moyen de plusieurs traversées de contact (6) et en ce que les électrodes internes sont connectées par une extrémité à un contact externe (7).
  2. Composant électrique selon la revendication 1, comprenant au moins un deuxième ensemble d'électrodes, internes (5) dont les électrodes internes (2) sont connectées les unes aux autres au moyen d'au moins une traversée de contact (6).
  3. Composant électrique selon l'une quelconque des revendications 1 ou 2, dans lequel un matériau céramique (3) est présent entre les électrodes internes (2) d'un ensemble d'électrodes internes (4, 5).
  4. Composant électrique selon l'une quelconque des revendications 2 à 3, dans lequel les ensembles d'électrodes internes (4, 5) sont disposés dans des régions d'extrémité opposées du corps de base (1).
  5. Composant électrique selon l'une quelconque des revendications 2 à 4, dans lequel le corps de base (1) est dépourvu d'électrodes internes entre les ensembles d'électrodes internes (4, 5).
  6. Composant électrique selon l'une quelconque des revendications 2 à 5, dans lequel les premier et deuxième ensembles d'électrodes internes (4, 5) sont disposés de manière à être séparés de la distance la plus grande possible l'un de l'autre dans des régions d'extrémité opposées du corps de base (1).
  7. Composant électrique selon l'une quelconque des revendications précédentes, dans lequel le corps de base (1) comprend un empilement de couches céramiques (3).
  8. Composant électrique selon l'une quelconque des revendications précédentes, dans lequel chaque ensemble d'électrodes internes (4, 5) est électriquement connecté à un contact externe.
  9. Composant électrique selon la revendication 8, dans lequel le contact externe (7) est disposé sur la surface du corps de base (1).
  10. Composant électrique selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il s'agit d'une varistance, dans lequel le corps de base (1) contient une céramique de varistance.
  11. Composant électrique selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il s'agit d'un composant NTC ou PTC, dans lequel le corps de base (1) contient respectivement une céramique NTC ou PTC.
EP06775776.5A 2005-08-01 2006-07-31 Composant electrique Active EP1911052B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510036102 DE102005036102A1 (de) 2005-08-01 2005-08-01 Elektrisches Bauelement
PCT/DE2006/001335 WO2007014550A1 (fr) 2005-08-01 2006-07-31 Composant electrique

Publications (2)

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

Family

ID=37401173

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06775776.5A Active EP1911052B1 (fr) 2005-08-01 2006-07-31 Composant electrique

Country Status (3)

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

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3930000A1 (de) * 1988-09-08 1990-03-15 Murata Manufacturing Co Varistor in schichtbauweise
JP2000068149A (ja) * 1998-08-25 2000-03-03 Murata Mfg Co Ltd 積層電子部品及びその製造方法
DE19903456A1 (de) * 1999-01-28 2000-08-10 Philips Corp Intellectual Pty Mehrkomponenten-Bauteil
JP3632592B2 (ja) * 1999-11-18 2005-03-23 株式会社村田製作所 チップサーミスタおよびその製造方法
JP4332634B2 (ja) * 2000-10-06 2009-09-16 Ｔｄｋ株式会社 積層型電子部品
DE10110680A1 (de) * 2001-03-06 2002-10-02 Epcos Ag Elektrisches Bauelement
DE10313891A1 (de) * 2003-03-27 2004-10-14 Epcos Ag Elektrisches Vielschichtbauelement

Also Published As

Publication number Publication date
EP1911052A1 (fr) 2008-04-16
WO2007014550A1 (fr) 2007-02-08
DE102005036102A1 (de) 2007-02-08

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