GB522660A - Improvements in or relating to electrical resistances - Google Patents

Improvements in or relating to electrical resistances

Info

Publication number
GB522660A
GB522660A GB36934/38A GB3693438A GB522660A GB 522660 A GB522660 A GB 522660A GB 36934/38 A GB36934/38 A GB 36934/38A GB 3693438 A GB3693438 A GB 3693438A GB 522660 A GB522660 A GB 522660A
Authority
GB
United Kingdom
Prior art keywords
layers
resistance
metal
dec
alkali
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
GB36934/38A
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.)
Fides Gesellschaft fuer die Verwaltung und Verwertung von Gewerblichen Schutzrechten mbH
Original Assignee
Fides Gesellschaft fuer die Verwaltung und Verwertung von Gewerblichen Schutzrechten mbH
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 Fides Gesellschaft fuer die Verwaltung und Verwertung von Gewerblichen Schutzrechten mbH filed Critical Fides Gesellschaft fuer die Verwaltung und Verwertung von Gewerblichen Schutzrechten mbH
Publication of GB522660A publication Critical patent/GB522660A/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
    • 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
    • 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
    • H01C7/001—Mass resistors

Landscapes

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

Abstract

522,660. Non-metal resistors. FIDES GES. FUR DIE VERWALTUNG UND VERWERTUNG VON GEWERBLICHEN SCHUTZRECHTEN. Dec. 19, 1938. No. 36934. Convention date, Dec. 18, 1937. [Class 37] In order to adjust the final value of a resistance, metal or other conducting layers are provided on the surface of the resistance and are ground away until the resistance has the desired value. The terminal contacts may be used also for correcting layers, being made initially larger than necessary and reduced in size for correction. The correcting layers may be formed by applying a colloidal silver salt in a solvent with reduction by thermal treatment, or silver layers may be made by applying silver oxide and reducing with simultaneous burning in. These layers may be welded to rigid metal contacts. The process may be applied to negative temperature coefficient resistances consisting of oxides and metals such as copper, titanium, and uranium. Terminal contacts b, c may be arranged in one plane on one side of the resistor a, a metal layer d being arranged on the opposite side. Correction of the resistance is effected by reducing the areas of the metal layers b, c, d. The Specification as open to inspection under Sect. 91, comprises also the following subjectmatter. In order to produce semi-conductor resistances of accurately predetermined value, a small percentage of alkali or alkali-earth compounds, for example sodium or potassium hydroxides or carbonates, is mixed with the initial substance before pressing, the pressed article being subjected to thermal treatment such as sintering. With a resistance of copper oxide, about 0.1 to 1 per cent. of sodium or potassium hydroxide or carbonate may be added, a sintering temperature of 700‹C. being suitable. This subject-matter does not appear in the Specification as accepted.
GB36934/38A 1937-12-18 1938-12-19 Improvements in or relating to electrical resistances Expired GB522660A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE522660X 1937-12-18

Publications (1)

Publication Number Publication Date
GB522660A true GB522660A (en) 1940-06-24

Family

ID=6551727

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36934/38A Expired GB522660A (en) 1937-12-18 1938-12-19 Improvements in or relating to electrical resistances

Country Status (1)

Country Link
GB (1) GB522660A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3601889A (en) * 1968-02-27 1971-08-31 Nippon Telegraph & Telephone Method of manufacturing thin film resistor elements
FR2233689A1 (en) * 1973-06-13 1975-01-10 Shevinov Pavel Automatic control for resistance filament mfr. - continuously operating and reduces reject level
EP1501104A1 (en) * 2003-06-13 2005-01-26 Shinko Electric Industries Co., Ltd. Circuit board having resistor and method for manufacturing the circuit board
DE102023107507A1 (en) 2023-03-24 2024-09-26 Isabellenhütte Heusler Gmbh & Co. Kg Method for providing an SMD component and corresponding SMD component

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3601889A (en) * 1968-02-27 1971-08-31 Nippon Telegraph & Telephone Method of manufacturing thin film resistor elements
FR2233689A1 (en) * 1973-06-13 1975-01-10 Shevinov Pavel Automatic control for resistance filament mfr. - continuously operating and reduces reject level
EP1501104A1 (en) * 2003-06-13 2005-01-26 Shinko Electric Industries Co., Ltd. Circuit board having resistor and method for manufacturing the circuit board
DE102023107507A1 (en) 2023-03-24 2024-09-26 Isabellenhütte Heusler Gmbh & Co. Kg Method for providing an SMD component and corresponding SMD component

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