Attachment of leads to precision resistors
US4286249A · kind A · utility
19Cited by
4References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1979 |
| Grant date | Aug 25, 1981 |
| Priority date | — |
| Expiry date | Dec 13, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C1/144
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A precision resistor has a thin resistive foil cemented to a much thicker rigid substrate. The foil has formed therein a pattern defining the resistive path between terminal pads. Copper leads can be spot-welded directly to these pads without damage to the junction. To that end, apertures are provided through the terminal pads, through which cement softened by the spot-welding heat can locally expand and gas evolved under pressure can escape, all without adversely affecting the junction and without substantial lifting of the terminal pads from the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.