GB727505A - Improvements in electric resistors - Google Patents

Improvements in electric resistors

Info

Publication number
GB727505A
GB727505A GB25746/52A GB2574652A GB727505A GB 727505 A GB727505 A GB 727505A GB 25746/52 A GB25746/52 A GB 25746/52A GB 2574652 A GB2574652 A GB 2574652A GB 727505 A GB727505 A GB 727505A
Authority
GB
United Kingdom
Prior art keywords
coating
resistance
auxiliary
main
coatings
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
GB25746/52A
Inventor
Walter Wilson Hugh Clarke
Charles Alan Mann
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.)
Balfour Beatty PLC
Original Assignee
BICC PLC
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 BICC PLC filed Critical BICC PLC
Priority to GB25746/52A priority Critical patent/GB727505A/en
Priority to FR1084564D priority patent/FR1084564A/en
Priority to US385664A priority patent/US2748234A/en
Publication of GB727505A publication Critical patent/GB727505A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/22—Apparatus or processes specially adapted for manufacturing resistors adapted for trimming
    • H01C17/24—Apparatus or processes specially adapted for manufacturing resistors adapted for trimming by removing or adding resistive material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/22—Apparatus or processes specially adapted for manufacturing resistors adapted for trimming
    • 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
    • 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
    • H01C7/006—Thin film resistors

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (AREA)
  • Measuring Volume Flow (AREA)

Abstract

727,505. Resistance coatings and deposits. BRITISH INSULATED CALLENDER'S CABLES, Ltd. Oct. 13, 1953 [Oct. 14, 1952], No. 25746/52. Class 37. A glass or other insulating support has a main and an auxiliary resistance coating. The main resistance coating is covered by an insulating coating and both these coatings are applied by evaporation by heat in a vacuum. The two resistance coatings are in series and the total resistance is adjusted to the required precision value by removal of an appropriate quantity of the auxiliary coating. The latter is of good stability when in contact with the atmosphere. In Fig. 1 the auxiliary coating 5 is of noble metal (e.g. an alloy of gold and platinum) and overlaps terminal deposits 2, 3 and the main coating 6 (e.g. an alloy of nickel and chromium) overlaps terminal deposits 3, 4. A layer 7 of magnesium fluoride, Fig. 2, insulates and protects the main resistance coating 6. The removable or adjustable auxiliary coating 5 provides only a minor part (e.g. 5 per cent) of the total resistance. In a modification, Fig. 3, the terminal layers, 3, 3, are omitted and a single layer 9 of noble metal is used. Instead of glass strip as at 1, glass tube may be used as the insulating support. The terminal layers are of silver and these and the noble metal auxiliary coating are painted on and then fired. During the processes of applying the main resistance and insulating coatings the auxiliary resistance coating is shielded from the successive vapour streams by a screen close to the glass strip but preferably not touching it.
GB25746/52A 1952-10-14 1952-10-14 Improvements in electric resistors Expired GB727505A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB25746/52A GB727505A (en) 1952-10-14 1952-10-14 Improvements in electric resistors
FR1084564D FR1084564A (en) 1952-10-14 1953-10-02 Advanced electrical resistors
US385664A US2748234A (en) 1952-10-14 1953-10-12 Electric resistors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB25746/52A GB727505A (en) 1952-10-14 1952-10-14 Improvements in electric resistors

Publications (1)

Publication Number Publication Date
GB727505A true GB727505A (en) 1955-04-06

Family

ID=10232605

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25746/52A Expired GB727505A (en) 1952-10-14 1952-10-14 Improvements in electric resistors

Country Status (3)

Country Link
US (1) US2748234A (en)
FR (1) FR1084564A (en)
GB (1) GB727505A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2586522A (en) * 2019-08-21 2021-02-24 Pragmatic Printing Ltd Thin-film components for integrated circuits

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3169892A (en) * 1959-04-08 1965-02-16 Jerome H Lemelson Method of making a multi-layer electrical circuit
US2916717A (en) * 1958-04-21 1959-12-08 Chicago Telephone Supply Corp Variable resistor
DE1200421B (en) * 1959-11-27 1965-09-09 Ibm Process for the production of electrical resistors
DE1908394B2 (en) * 1968-02-27 1971-10-21 METHOD FOR MANUFACTURING A THIN FILM RESISTOR ELEMENT
US3931496A (en) * 1974-11-21 1976-01-06 General Electric Company Electrical heating plate with terminal means for high temperature film heater
US4228418A (en) * 1979-03-28 1980-10-14 The United States Of America As Represented By The Secretary Of The Army Modular trim resistive network
JPS59227101A (en) * 1983-06-07 1984-12-20 株式会社日本自動車部品総合研究所 Thick film resistor
JPS63140558A (en) * 1986-12-02 1988-06-13 Toshiba Corp Thick film circuit substrate
JPH0795483B2 (en) * 1989-05-18 1995-10-11 株式会社東芝 Method for manufacturing thick film resistance element

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB342300A (en) * 1929-10-28 1931-01-28 Hotpoint Electric Appliance Co Improvements in and relating to electric heating units
US2021661A (en) * 1932-11-17 1935-11-19 Dispersion Cathodique Sa Electrical heating element of large surface for low temperatures
GB461275A (en) * 1935-08-15 1937-02-15 Pilkington Brothers Ltd Improved electric heating apparatus and method of making it
US2281843A (en) * 1940-02-03 1942-05-05 Continental Carbon Inc Metal film resistor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2586522A (en) * 2019-08-21 2021-02-24 Pragmatic Printing Ltd Thin-film components for integrated circuits
GB2586522B (en) * 2019-08-21 2022-01-19 Pragmatic Printing Ltd Thin-film components for integrated circuits

Also Published As

Publication number Publication date
US2748234A (en) 1956-05-29
FR1084564A (en) 1955-01-20

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