EP0034511A3 - Non linear ceramic resistor having a low threshold voltage, and process for its production - Google Patents
Non linear ceramic resistor having a low threshold voltage, and process for its production Download PDFInfo
- 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- Withdrawn
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. The object of the invention is to obtain varistors (resis ceramic material with non-linear characteristic current as a function of voltage) at low threshold voltage, in the range of 5 to 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. For this purpose, we use the fact that the threshold voltage (point of start of an exponential increase in the ohmi value that) depends on the barriers of intergranular potentials of crystallites located in the ceramic between the two electrodes. We therefore increase the diameter of the grains by limiting ourselves to a twenty microns, and we bring the electrodes up to 50 microns by making interdigitated metallizations (11, 12) deposited on a plate (1) of ZnO-based material sintered so as to present the desired particle size.
Application à la protection de circuits électroniques. Application to the protection of electronic circuits.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8003044A FR2475791A1 (en) | 1980-02-12 | 1980-02-12 | NON-LINEAR CERAMIC RESISTANCE WITH LOW THRESHOLD VOLTAGE AND METHOD OF MANUFACTURING THE SAME |
FR8003044 | 1980-02-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0034511A2 EP0034511A2 (en) | 1981-08-26 |
EP0034511A3 true EP0034511A3 (en) | 1981-09-09 |
Family
ID=9238482
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81400054A Withdrawn EP0034511A3 (en) | 1980-02-12 | 1981-01-16 | Non linear ceramic resistor having a low threshold voltage, and process for its production |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0034511A3 (en) |
JP (1) | JPS56125807A (en) |
BR (1) | BR8100814A (en) |
FR (1) | FR2475791A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2513032B1 (en) * | 1981-09-14 | 1985-12-13 | Carreras Michelle | INTEGRATED PROTECTION AGAINST OVERVOLTAGES OF AN ELECTRONIC CIRCUIT, AND ELECTRONIC CIRCUIT PROTECTED BY THIS DEVICE |
FR2726941A1 (en) * | 1986-01-28 | 1996-05-15 | Cimsa Cintra | INTEGRATED VARISTOR PROTECTION DEVICE OF AN ELECTRONIC COMPONENT AGAINST THE EFFECTS OF AN ELECTRO-MAGNETIC FIELD OR STATIC LOADS |
JP4953055B2 (en) * | 2006-04-28 | 2012-06-13 | 大日本印刷株式会社 | Plastic container |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1491465A (en) * | 1966-06-28 | 1967-08-11 | Lorraine Carbone | Surface resistance manufacturing process |
FR2146453A1 (en) * | 1971-07-22 | 1973-03-02 | Gen Electric | |
DE2528090A1 (en) * | 1974-07-01 | 1976-01-22 | Gen Electric | POLYCRYSTALLINE VARISTOR WITH MANY CONNECTIONS |
FR2286804A1 (en) * | 1974-10-01 | 1976-04-30 | Thomson Csf | MATERIAL AND METHOD OF MANUFACTURING CERAMIC PARTS FOR VARISTORS |
-
1980
- 1980-02-12 FR FR8003044A patent/FR2475791A1/en active Granted
-
1981
- 1981-01-16 EP EP81400054A patent/EP0034511A3/en not_active Withdrawn
- 1981-02-10 JP JP1759681A patent/JPS56125807A/en active Pending
- 1981-02-10 BR BR8100814A patent/BR8100814A/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1491465A (en) * | 1966-06-28 | 1967-08-11 | Lorraine Carbone | Surface resistance manufacturing process |
FR2146453A1 (en) * | 1971-07-22 | 1973-03-02 | Gen Electric | |
DE2528090A1 (en) * | 1974-07-01 | 1976-01-22 | Gen Electric | POLYCRYSTALLINE VARISTOR WITH MANY CONNECTIONS |
FR2286804A1 (en) * | 1974-10-01 | 1976-04-30 | Thomson Csf | MATERIAL AND METHOD OF MANUFACTURING CERAMIC PARTS FOR VARISTORS |
Non-Patent Citations (1)
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 |
---|---|
FR2475791B1 (en) | 1983-05-13 |
BR8100814A (en) | 1981-08-25 |
JPS56125807A (en) | 1981-10-02 |
EP0034511A2 (en) | 1981-08-26 |
FR2475791A1 (en) | 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 |
Free format text: ORIGINAL CODE: 0009012 |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
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 |