EP0437673B1 - Kombination von Anschlussdraht und Kontaktfläche aus Metallschichten an elektrischen Widerständen zur Befestigung von Anschlussdrähten - Google Patents

Kombination von Anschlussdraht und Kontaktfläche aus Metallschichten an elektrischen Widerständen zur Befestigung von Anschlussdrähten Download PDF

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Publication number
EP0437673B1
EP0437673B1 EP90115768A EP90115768A EP0437673B1 EP 0437673 B1 EP0437673 B1 EP 0437673B1 EP 90115768 A EP90115768 A EP 90115768A EP 90115768 A EP90115768 A EP 90115768A EP 0437673 B1 EP0437673 B1 EP 0437673B1
Authority
EP
European Patent Office
Prior art keywords
contact surface
connecting wire
web
contact
combination
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 - Lifetime
Application number
EP90115768A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0437673A3 (en
EP0437673A2 (de
Inventor
Wolfgang Dr. Dipl.-Phys. Platen
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0437673A2 publication Critical patent/EP0437673A2/de
Publication of EP0437673A3 publication Critical patent/EP0437673A3/de
Application granted granted Critical
Publication of EP0437673B1 publication Critical patent/EP0437673B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01C1/142—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors the terminals or tapping points being coated on the resistive element

Definitions

  • the invention relates to a combination of connecting wire and contact surface made of metal layers on electrical resistors for fastening connecting wires, in which the contact zone between connecting wire and contact surface is at least 5 times larger than the smaller cross section of connecting wire or contact surface.
  • the area of the contact (contact wire) between the connecting wire and the contact area of the electrical resistance is considerably larger than the cross-sectional area of the electrical supply line (connecting wire and contact areas).
  • Such a contact zone is created e.g. thermocompression welding. Normally, this contact zone between the connecting wire and the contact surface is at least 5 times larger than the smallest cross section of the connecting wire or contact surface.
  • the contact areas of the electrical sheet resistors usually consist of rectangular areas that are electrically connected to the resistor.
  • This object is achieved in that there are two separate and electrically insulated areas within the contact area, between which there is an electrically conductive web, and that the connecting wire is fastened to the web and the two insulated areas.
  • the web preferably has a parabolic cross-sectional taper from the outside inward in the region of the contact zone. It is also advantageous if the isolated areas are designed as rectangles.
  • the web can be designed in different ways: a web with the same cross-section over the entire length of the web always provides the same electrical cross-sectional area as the contact zone, regardless of the position of the connecting wire across the web. If the connecting wire is incorrectly positioned on the web, only the error in the position along the web will be included in the scatter of the electrical resistance value. This error is also compensated for in the case of a web with a variable cross section along the web. With the same thickness, the width variation is selected so that the overall resistance of the connection remains constant when the wire contact point is displaced along the web.
  • a possible cross-sectional geometry has a parabolic profile under the ideally hidden contact zone. When the contact on the web is shifted, the electrical resistance of the supply line becomes smaller on one side, but increases on the other side by a larger amount, so that the total resistance of the connection remains the same.
  • the total resistance can be reduced by using other web profiles.
  • the error is not fully compensated for but only reduced (e.g. triangular profile instead of parabola).
  • These structured contact surfaces which are provided with webs, can be used for electrical resistances made of all possible materials (e.g. metals such as platinum, nickel; semiconductors such as silicon; conductive plastics), manufactured using thin or thick film technology or from foils. Suitable methods for producing the structures are, for example, laser structuring, dry or wet etching.
  • the webs can be longitudinal or transverse to the component geometry, in special cases they can be angled or curved instead of straight.
  • the width can be varied by means of edge modulation on both sides.
  • Post-treatment steps of the contact surfaces e.g. reinforcement of the connection surfaces
  • Post-treatment steps of the contact surfaces have no significant influence on the properties of the webs.
  • Known attachment methods for the connecting wires are thermocompression welding / bonding, gap welding, soldering or other methods which produce a sufficiently large contact area with the component.
  • FIG. 1 The figures schematically show a top view of the contact surfaces structured according to the invention, a bar with a constant cross section being shown in Figure I and a bar with a parabolically tapered cross section being shown in Figure II.
  • the contact area (1) there are two rectangular, separated and electrically insulated areas (2).
  • a web (3) is formed between these two isolated areas (2).
  • the connection wires (4) are fastened in such a way that the contact zone (5) extends to the web (3) and the two insulated areas (2).

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Details Of Resistors (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
EP90115768A 1990-01-18 1990-08-17 Kombination von Anschlussdraht und Kontaktfläche aus Metallschichten an elektrischen Widerständen zur Befestigung von Anschlussdrähten Expired - Lifetime EP0437673B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4001337A DE4001337C1 (enrdf_load_stackoverflow) 1990-01-18 1990-01-18
DE4001337 1990-01-18

Publications (3)

Publication Number Publication Date
EP0437673A2 EP0437673A2 (de) 1991-07-24
EP0437673A3 EP0437673A3 (en) 1992-04-15
EP0437673B1 true EP0437673B1 (de) 1994-11-02

Family

ID=6398314

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90115768A Expired - Lifetime EP0437673B1 (de) 1990-01-18 1990-08-17 Kombination von Anschlussdraht und Kontaktfläche aus Metallschichten an elektrischen Widerständen zur Befestigung von Anschlussdrähten

Country Status (2)

Country Link
EP (1) EP0437673B1 (enrdf_load_stackoverflow)
DE (2) DE4001337C1 (enrdf_load_stackoverflow)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4034149A (en) * 1975-10-20 1977-07-05 Western Electric Company, Inc. Substrate terminal areas for bonded leads
US4286249A (en) * 1978-03-31 1981-08-25 Vishay Intertechnology, Inc. Attachment of leads to precision resistors
DE3722576A1 (de) * 1987-07-08 1989-01-19 Danfoss As Elektrischer schichtwiderstand und verfahren zu dessen herstellung

Also Published As

Publication number Publication date
EP0437673A3 (en) 1992-04-15
EP0437673A2 (de) 1991-07-24
DE4001337C1 (enrdf_load_stackoverflow) 1991-04-25
DE59007634D1 (de) 1994-12-08

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