Resistance element with improved linearity and method of making the same
US4032881A · kind A · utility
23Cited by
5References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 6, 1976 |
| Grant date | Jun 28, 1977 |
| Priority date | — |
| Expiry date | Feb 6, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49099
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A highly accurate resistance element formed by depositing a plurality of conductive pads at spaced intervals along a substrate, depositing the resistance element in intimate electrical contact with the pads, sensing the electrical resistance between successive pairs of pads, and trimming away resistance material from the element between selected pairs of pads until predetermined resistance values between each pair are achieved. In a preferred embodiment a portion of each pad is offset from the resistance element and adapted to receive a probe from a laser trimmer. The element can be advantageously employed in potentiometers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.