GB1198563A - Improvements in and elating to the manufacture of Electric Resistors - Google Patents

Improvements in and elating to the manufacture of Electric Resistors

Info

Publication number
GB1198563A
GB1198563A GB2007268A GB2007268A GB1198563A GB 1198563 A GB1198563 A GB 1198563A GB 2007268 A GB2007268 A GB 2007268A GB 2007268 A GB2007268 A GB 2007268A GB 1198563 A GB1198563 A GB 1198563A
Authority
GB
United Kingdom
Prior art keywords
oxide
zinc
ohmic
tin
aluminium
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
GB2007268A
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of GB1198563A publication Critical patent/GB1198563A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
    • H01B1/08—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances oxides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/28—Apparatus or processes specially adapted for manufacturing resistors adapted for applying terminals
    • H01C17/281—Apparatus or processes specially adapted for manufacturing resistors adapted for applying terminals by thick film techniques
    • H01C17/283—Precursor compositions therefor, e.g. pastes, inks, glass frits
    • H01C17/285—Precursor compositions therefor, e.g. pastes, inks, glass frits applied to zinc or cadmium oxide resistors
    • 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)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)

Abstract

1,198,563. Non-linear resistors. MATSUSHITA ELECTRIC INDUSTRIAL CO. Ltd. 26 April, 1968 [27 April, 1967], No. 20072/68. Heading H1K. A non-linear resistor comprises a sintered body 1, consisting essentially of zinc oxide, having two main faces, one of which has an electrical resistivity higher than that of the other and two electrodes 2, 3 applied to these faces of the body, one making a non-ohmic contact with the face having a higher electrical resistivity and the second making either an ohmic or non-ohmic connection to the other surface. The low resistivity face is obtained by removing over one main face the high resistivity surface layer of the body formed during sintering in an oxidizing atmosphere. The body contains 90 to 99.95 mol. per cent of zinc oxide and at least one oxide from the group consisting of iron oxide, aluminium oxide, bismuth oxide, magnesium oxide, calcium oxide, nickel oxide, cobalt oxide, niobium oxide, tantalum oxide, zirconium oxide, tungsten oxide, cadmium oxide and chromium oxide. The non-ohmic electrode is substantially silver with small amounts of lead oxide, silicon dioxide, boron oxide, bismuth oxide, calcium oxide and cupric oxide, and is painted on to the body. The ohmic electrode may be an evaporated film of aluminium, zinc, tin or indium, an electroless or electrolytic plated film of silver, copper, nickel, zinc or tin or a metallized film of copper, tin, zinc or aluminium.
GB2007268A 1967-04-27 1968-04-26 Improvements in and elating to the manufacture of Electric Resistors Expired GB1198563A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2749667 1967-04-27

Publications (1)

Publication Number Publication Date
GB1198563A true GB1198563A (en) 1970-07-15

Family

ID=12222733

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2007268A Expired GB1198563A (en) 1967-04-27 1968-04-26 Improvements in and elating to the manufacture of Electric Resistors

Country Status (3)

Country Link
FR (1) FR1560962A (en)
GB (1) GB1198563A (en)
NL (1) NL145710B (en)

Also Published As

Publication number Publication date
NL6805995A (en) 1968-10-28
DE1765244A1 (en) 1971-10-07
FR1560962A (en) 1969-03-21
NL145710B (en) 1975-04-15
DE1765244B2 (en) 1976-08-19

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years