GB1119741A - Oxide film resistors - Google Patents

Oxide film resistors

Info

Publication number
GB1119741A
GB1119741A GB683/67A GB68367A GB1119741A GB 1119741 A GB1119741 A GB 1119741A GB 683/67 A GB683/67 A GB 683/67A GB 68367 A GB68367 A GB 68367A GB 1119741 A GB1119741 A GB 1119741A
Authority
GB
United Kingdom
Prior art keywords
metal
oxide
protective film
film
metal layer
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
GB683/67A
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.)
Welwyn Electric Ltd
Original Assignee
Welwyn Electric 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 Welwyn Electric Ltd filed Critical Welwyn Electric Ltd
Publication of GB1119741A publication Critical patent/GB1119741A/en
Expired 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
    • 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
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
    • 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
    • H01C1/148—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors the terminals embracing or surrounding the resistive element

Abstract

<PICT:1119741/C6-C7/1> A protective film of metal oxide is applied to an oxide film resistor such that the protective film consists of a continuous layer of metal oxide merging into terminal regions of metal corresponding to the metal oxide, the metal oxide being either insulating or of a lower conductivity than the oxide forming the resistance element. The body of the resistor may be of glass or ceramic material, the resistance element is usually of tin oxide with or without other oxides but may be of cadmium or titanium oxide and the protective film may be of copper, iron or magnesium oxide. A second metal such as nickel or cobalt or silver, gold or platinium may be plated over the metal end terminal regions of the protective film. Metal terminals are attached to the resistor to make contact with the metallic regions of the protective film. Three methods for coating a quantity of resistors are described; they are 1. Depositing a metal layer, plating the terminal regions with a second metal (e.g. nickel) and oxidizing the rest of the metal layer thereby forming the protective oxide film, 2. Depositing a metal layer, oxidizing it completely, then reducing the terminal portions to the metal. 3. Depositing a metal layer, applying terminals e.g. end caps of nickel-plated mild steel to the end of the metal film and then oxidizing the film. Electroless plating methods are described for each method of production, but the oxidisable metal layer for the protective film may also be deposited by vacuum deposition or electro-deposition.
GB683/67A 1966-01-11 1967-01-05 Oxide film resistors Expired GB1119741A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1329066 1966-01-11
IT55366 1966-01-11

Publications (1)

Publication Number Publication Date
GB1119741A true GB1119741A (en) 1968-07-10

Family

ID=26325022

Family Applications (1)

Application Number Title Priority Date Filing Date
GB683/67A Expired GB1119741A (en) 1966-01-11 1967-01-05 Oxide film resistors

Country Status (4)

Country Link
US (1) US3469227A (en)
DE (1) DE1690472A1 (en)
FR (1) FR1507003A (en)
GB (1) GB1119741A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3805210A (en) * 1969-12-04 1974-04-16 M Croset Integrated circuit resistor and a method for the manufacture thereof
US3645783A (en) * 1970-06-03 1972-02-29 Infrared Ind Inc Thin film planar resistor
US4866411A (en) * 1988-03-25 1989-09-12 Caddock Richard E Film-type cylindrical resistor, and method of making it

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2934736A (en) * 1957-10-08 1960-04-26 Corning Glass Works Electrical resistor

Also Published As

Publication number Publication date
US3469227A (en) 1969-09-23
FR1507003A (en) 1967-12-22
DE1690472A1 (en) 1971-05-27

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