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Patent US3573703A successfully refreshed from Google Patents.
US3573703A
Expired / Lapsed
US
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Resistor and method of adjusting resistance
Assignee: Individual
•
Filing: 1969-05-09
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Granted: 1971-04-06
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Expires: 1989-05-09
Abstract
Abstract A resistor is formed on an insulating support between a pair of electrode terminals, a portion of the resistor extending out of the direct field established between the electrodes. The resistance value is precisely adjusted by removing resistor material in the fringing field.
Inventors
- 👤 Darnall P Burks
- 👤 John P Maher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:18
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/22; H01C17/24; H01C17/245; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49099
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
A method of precisely adjusting a thick film resistor which comprises the steps of: positioning a pair of electrode terminal on an insulating substrate; depositing a resistor film on the substrate overlying the area between said electrode terminals and an additional area extending beyond said area between said terminals, whereby a direct field is established across the film between the electrodes while a fringing field is established across the resistor film lying outside the electrode encompassing area; first removing a portion of the resistance film lying in said direct field to cause a rough adjustment in the resistance value; and second removing a portion of the resistance film lying in said fringing field so as to adjust to the final desired resistance value.
Claim 2
Independent Claim
123 words
A method of precisely adjusting a thick film resistor which comprises the steps of: positioning a pair of electrode terminal on an insulating substrate; depositing a resistor film on the substrate overlying the area between said electrode terminals and an additional area extending beyond said area between said terminals, whereby a direct field is established across the film between the electrodes while a fringing field is established across the resistor film lying outside the electrode encompassing area; first removing a portion of the resistance film lying in said direct field to cause a rough adjustment in the resistance value; and second removing a portion of the resistance film lying in said fringing field so as to adjust to the final desired resistance value.
Claim 3
Dependent Claim
103 words
A resistor comprising an insulating support; a pair of electrode terminals carried by said support; a resistance film on the support having a first portion of nonuniform width extending between and in contact with both of said terminals and across which a direct field will be established, a second portion of said resistance film extending beyond the area confined between the two electrodes and across which a fringing field will be established, the extending portion also being of a nonuniform width, the nonuniform width of the two portion resistance film having been made by removing parts of the film for adjusting resistance value.
Claim 4
Dependent Claim
103 words
A resistor comprising an insulating support; a pair of electrode terminals carried by said support; a resistance film on the support having a first portion of nonuniform width extending between and in contact with both of said terminals and across which a direct field will be established, a second portion of said resistance film extending beyond the area confined between the two electrodes and across which a fringing field will be established, the extending portion also being of a nonuniform width, the nonuniform width of the two portion resistance film having been made by removing parts of the film for adjusting resistance value.
References Cited (Backward Citations)
US3284878A
Cited
US3422386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |