EP0034511A3 - Résistance céramique non linéaire à faible tension de seuil, et son procédé de fabrication - Google Patents

Résistance céramique non linéaire à faible tension de seuil, et son procédé de fabrication Download PDF

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Publication number
EP0034511A3
EP0034511A3 EP81400054A EP81400054A EP0034511A3 EP 0034511 A3 EP0034511 A3 EP 0034511A3 EP 81400054 A EP81400054 A EP 81400054A EP 81400054 A EP81400054 A EP 81400054A EP 0034511 A3 EP0034511 A3 EP 0034511A3
Authority
EP
European Patent Office
Prior art keywords
threshold voltage
low threshold
production
non linear
electrodes
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.)
Withdrawn
Application number
EP81400054A
Other languages
German (de)
English (en)
Other versions
EP0034511A2 (fr
Inventor
Annick Romann
François Buchy
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.)
L.C.C.-C.I.C.E. - COMPAGNIE EUROPEENNE DE COMPOSAN
Original Assignee
Lcc-Cice - Europeenne De Composants Electroniques Cie
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 Lcc-Cice - Europeenne De Composants Electroniques Cie filed Critical Lcc-Cice - Europeenne De Composants Electroniques Cie
Publication of EP0034511A2 publication Critical patent/EP0034511A2/fr
Publication of EP0034511A3 publication Critical patent/EP0034511A3/fr
Withdrawn legal-status Critical Current

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
    • H01C7/10—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 voltage responsive, i.e. varistors
    • H01C7/102—Varistor boundary, e.g. surface layers
    • 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
    • H01C1/142—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors the terminals or tapping points being coated on the resistive element

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (AREA)

Abstract

L'invention a pour but l'obtention de varistances (résis­ tances en matériau céramique à caractéristique non linéaire du courant en fonction de la tension) à faible tension de seuil, de l'ordre de 5 à 10 volts.
A cet effet, on utilise le fait que la tension de seuil (point de départ d'une augmentation exponentielle de la valeur ohmi­ que) dépend des barrières de potentiels intergranulaires des cristallites situés dans la céramique entre les deux électrodes. On augmente donc le diamètre des grains en se bornant à une vingtaine de microns, et l'on rapproche les électrodes jusqu'à 50 microns en réalisant des métallisations interdigitées (11, 12) déposées sur une plaquette (1) en matériau à base de ZnO fritté de à façon présenter la granulométrie désirée.
Application à la protection de circuits électroniques.
EP81400054A 1980-02-12 1981-01-16 Résistance céramique non linéaire à faible tension de seuil, et son procédé de fabrication Withdrawn EP0034511A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8003044 1980-02-12
FR8003044A FR2475791A1 (fr) 1980-02-12 1980-02-12 Resistance ceramique non lineaire a faible tension de seuil, et son procede de fabrication

Publications (2)

Publication Number Publication Date
EP0034511A2 EP0034511A2 (fr) 1981-08-26
EP0034511A3 true EP0034511A3 (fr) 1981-09-09

Family

ID=9238482

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400054A Withdrawn EP0034511A3 (fr) 1980-02-12 1981-01-16 Résistance céramique non linéaire à faible tension de seuil, et son procédé de fabrication

Country Status (4)

Country Link
EP (1) EP0034511A3 (fr)
JP (1) JPS56125807A (fr)
BR (1) BR8100814A (fr)
FR (1) FR2475791A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2513032B1 (fr) * 1981-09-14 1985-12-13 Carreras Michelle Dispositif de protection integre contre les surtensions d'un circuit electronique, et circuit electronique protege par ce dispositif
FR2726941A1 (fr) * 1986-01-28 1996-05-15 Cimsa Cintra Dispositif integre de protection par varistance d'un composant electronique contre les effets d'un champ electro-magnetique ou de charges statiques
JP4953055B2 (ja) * 2006-04-28 2012-06-13 大日本印刷株式会社 プラスチック製容器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1491465A (fr) * 1966-06-28 1967-08-11 Lorraine Carbone Procédé de fabrication de résistances superficielles
FR2146453A1 (fr) * 1971-07-22 1973-03-02 Gen Electric
DE2528090A1 (de) * 1974-07-01 1976-01-22 Gen Electric Polykristalliner varistor mit vielen anschluessen
FR2286804A1 (fr) * 1974-10-01 1976-04-30 Thomson Csf Materiau et procede de fabrication de pieces en ceramique pour varistances

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1491465A (fr) * 1966-06-28 1967-08-11 Lorraine Carbone Procédé de fabrication de résistances superficielles
FR2146453A1 (fr) * 1971-07-22 1973-03-02 Gen Electric
DE2528090A1 (de) * 1974-07-01 1976-01-22 Gen Electric Polykristalliner varistor mit vielen anschluessen
FR2286804A1 (fr) * 1974-10-01 1976-04-30 Thomson Csf Materiau et procede de fabrication de pieces en ceramique pour varistances

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JOURNAL OF APPLIED PHYSICS, Vol. 51, No 1, Janvier 1980 New York, US F.A. SELIM et al.: "Low voltage ZnO varistor: Device process and defect model", pages 765-768 *

Also Published As

Publication number Publication date
JPS56125807A (en) 1981-10-02
EP0034511A2 (fr) 1981-08-26
BR8100814A (pt) 1981-08-25
FR2475791B1 (fr) 1983-05-13
FR2475791A1 (fr) 1981-08-14

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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

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PUAL Search report despatched

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AK Designated contracting states

Designated state(s): DE GB IT NL

AK Designated contracting states

Designated state(s): DE GB IT NL

17P Request for examination filed

Effective date: 19811012

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: L.C.C.-C.I.C.E. - COMPAGNIE EUROPEENNE DE COMPOSAN

18D Application deemed to be withdrawn

Effective date: 19830210

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BUCHY, FRANCOIS

Inventor name: ROMANN, ANNICK