Film resistors having trimmable electrodes
US5363084A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 26, 1993 |
| Grant date | Nov 8, 1994 |
| Priority date | — |
| Expiry date | Feb 26, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C10/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Thin or thick film resistor devices (e.g., electronic resistors and thermistors) are trimmable without disturbing the active resistor film or necessarily requiring temperature control during trimming by providing a plurality of electrically conductive fingers having one end integral with one of the electrodes and a terminal end which extends at least substantially across the cross-wise dimension of the resistance film. The electrode fingers thereby electrically bridge a respective surface region of the substrate on which the electrodes and film are disposed. One or more of these fingers may thus be severed from the electrodes at the bridged respective surface region of the substrate so that the resistance value of the device can be controllably selected. By providing various finger-to-finger separation dimensions (to thereby establish various widths of segments of the active resistor film), a large number of resistance trimming combinations can be provided so that virtually any desired resistance value for the device can be obtained in dependence upon the particular finger(s) which is(are) severed. The resistance of very high resistance thermistors may also easily be reduced (e.g.,…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.