US4205299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin film resistor
Assignee: Individual
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Filing: 1978-12-29
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Granted: 1980-05-27
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Expires: 1998-12-29
Abstract
Abstract Thin-film resistors with an insulating carrier member and a resistor film applied to the carrier member, in which the resistor film is a chrome-nickel film containing an added amount of at least one of the metals gold, aluminum, cobalt or tin. Mole percentages of the constituents of the resistive film are defined.
Inventors
- 👤 Fritz Klesse
- 👤 Jurgen Forster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:47
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/06; H01C17/075; H01C17/12; H01C7/00; H01C7/006
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
191 words
Thin-film resistor comprising an insulating carrier member with a resistor film deposited thereon, the resistor film comprising 30 to 80 mole percent of a metal selected from the group consisting of chromiom and a chromiom compound, 10 to 35 mole percent nickel and 10 to 35 percent of an added amount of at least one metal selected from the group consisting of gold, cobalt, aluminum, and tin in at least one form selected from the group consisting of metal and metal oxide, said deposition having been carried out by reactive sputtering in the presence of a reactive gas containing oxygen, having a partial pressure of from 1×10 6 to 1×10 4 Torr, said resistor having a resistance range of between 1 Ohm to 10 6 Ohm; electrical stress of 1 Watt to ambient temperature of 70° C.; temperature coefficient of -200×10 -6 /°C.; change in resistance of ≦±1% after 1,000 hours at 70° C. and 1 Watt of electrical stress; change in resistance of ≦±1.5% after 10,000 hours at 70° C. and 1 Watt of electrical stress; change in value under the effect of moisture ≦±0.5% and non-linearity (1,000 kohm)≦100 dB.
Claim 2
Dependent Claim
191 words
Thin-film resistor comprising an insulating carrier member with a resistor film deposited thereon, the resistor film comprising 30 to 80 mole percent of a metal selected from the group consisting of chromiom and a chromiom compound, 10 to 35 mole percent nickel and 10 to 35 percent of an added amount of at least one metal selected from the group consisting of gold, cobalt, aluminum, and tin in at least one form selected from the group consisting of metal and metal oxide, said deposition having been carried out by reactive sputtering in the presence of a reactive gas containing oxygen, having a partial pressure of from 1×10 6 to 1×10 4 Torr, said resistor having a resistance range of between 1 Ohm to 10 6 Ohm; electrical stress of 1 Watt to ambient temperature of 70° C.; temperature coefficient of -200×10 -6 /°C.; change in resistance of ≦±1% after 1,000 hours at 70° C. and 1 Watt of electrical stress; change in resistance of ≦±1.5% after 10,000 hours at 70° C. and 1 Watt of electrical stress; change in value under the effect of moisture ≦±0.5% and non-linearity (1,000 kohm)≦100 dB.
Claim 3
Dependent Claim
33 words
The thin resistor film of claim 1, having a composition comprising 30 to 80 mole percent chromium compound, 10 to 35 percent nickel compound and 10 to 35 percent of the added metals.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-05-27 | 1983-11-26 | 1984-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-27 | 1987-11-26 | 1988-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-27 | 1991-11-26 | 1992-05-27 | $7700.00 | Window Closed / Lapsed |