GB1361704A - Metal oxide varistor - Google Patents

Metal oxide varistor

Info

Publication number
GB1361704A
GB1361704A GB4503772A GB4503772A GB1361704A GB 1361704 A GB1361704 A GB 1361704A GB 4503772 A GB4503772 A GB 4503772A GB 4503772 A GB4503772 A GB 4503772A GB 1361704 A GB1361704 A GB 1361704A
Authority
GB
United Kingdom
Prior art keywords
electrodes
substrate
nitride
thermal conductivity
high thermal
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.)
Expired
Application number
GB4503772A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB1361704A publication Critical patent/GB1361704A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/08—Cooling, heating or ventilating arrangements
    • 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

Landscapes

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

Abstract

1361704 Varistors GENERAL ELECTRIC CO 29 Sept 1972 [1 Oct 1971] 45037/72 Heading H1K A varistor assembly 10 (Fig. 3) comprises a metal oxide substrate 11 having opposed major surfaces 12, 13 and α>10 for current density 10<SP>-3</SP> to 10<SP>2</SP> A/cm<SP>2</SP> in the characteristic I = (V/(C)<SP>α</SP> where I current, V = voltage, and C is a constant. Electrodes 14, 15 ohmically contact surfaces 12, 13 and have attached leads 16, 17. High thermal conductivity spaced plates 19, 20 of, e.g. Cu parallel to the surfaces are bonded together by potting compound 18 enclosing the varistor substrate and its electrodes for heat dissipation, and the compound contains high thermal conductivity insulant material, e.g. boron nitride, beryllium nitride or oxide, aluminium nitride and an epoxy resin. The substrate material is polycrystalline material of, e.g. zinc oxide with a small proportion of bismuth, aluminium, iron, magnesium or calcium oxides sintered together and pressed into shape. One of the spaced plates may be drilled for mounting, and in a modification (Fig. 4, not shown) the leads may be planar extensions of the electrodes.
GB4503772A 1971-10-01 1972-09-29 Metal oxide varistor Expired GB1361704A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18572371A 1971-10-01 1971-10-01

Publications (1)

Publication Number Publication Date
GB1361704A true GB1361704A (en) 1974-07-30

Family

ID=22682213

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4503772A Expired GB1361704A (en) 1971-10-01 1972-09-29 Metal oxide varistor

Country Status (6)

Country Link
JP (1) JPS5443700B2 (en)
DE (1) DE2248159C2 (en)
FR (1) FR2156651B1 (en)
GB (1) GB1361704A (en)
IE (1) IE36727B1 (en)
SE (1) SE381947B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5217022A (en) * 1975-07-30 1977-02-08 Fuji Xerox Co Ltd Developer for electrostatic printing

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE472109C (en) * 1922-02-11 1929-02-25 Siemens Schuckertwerke Akt Ges Lightning arrester, consisting of a plurality of flat bodies or discs with surfaces in contact with one another, one on top of the other
DE635491C (en) * 1933-07-25 1936-09-18 Aeg Resistor for surge arresters composed of conductive materials and binding agents
US2501322A (en) * 1946-11-07 1950-03-21 Westinghouse Electric Corp Moisture-resistant lightning arrester valve block
NL192214A (en) * 1954-01-21
DE1110311B (en) * 1954-02-27 1961-07-06 Siemens Ag Electrical components built into the housing and protected against moisture by being embedded in a casting compound
NL101297C (en) * 1956-06-12
FR1379676A (en) * 1962-11-09 1964-11-27 Philco Corp Further training in semiconductor devices
US3278813A (en) * 1964-04-22 1966-10-11 Gen Electric Transistor housing containing packed, earthy, nonmetallic, electrically insulating material
CA831691A (en) * 1967-10-09 1970-01-06 Matsuoka Michio Non-linear resistors of bulk type

Also Published As

Publication number Publication date
JPS5443700B2 (en) 1979-12-21
DE2248159C2 (en) 1983-03-17
IE36727B1 (en) 1977-02-02
FR2156651A1 (en) 1973-06-01
DE2248159A1 (en) 1973-04-19
JPS4843154A (en) 1973-06-22
FR2156651B1 (en) 1977-08-26
IE36727L (en) 1973-04-01
SE381947B (en) 1975-12-22

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee