US4269898A
Expired / Lapsed
US
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Resistance material
Assignee: US Philips Corp
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Filing: 1979-09-14
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Granted: 1981-05-26
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Expires: 1999-09-14
Abstract
Abstract Resistance material consisting of a mixture of metal oxidic compounds, metal oxides, a permanent and a temporary binder, the resistance-determining component consisting of thallium rhodate TlRh 2 O 4 . This component has a linear positive temperature coefficient of the resistance TCR which enables the composition of a resistor having a very low TCR by combining it with a material having a negative TCR. The resistor is produced on the basis of this resistance material provided on a substrate.
Inventors
- 👤 Alexander H. Boonstra
- 👤 Cornelis A. H. A. Mutsaers
- 👤 Franciscus N. G. R. Van der Kruijs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:57
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/06; H01C17/065; H01C17/06506; H01C17/06513; H01C17/06533; H01C17/0654; H01C7/00; H01C7/02; H01C7/021; H01C7/022; H01C7/023; H01C7/04; H01C7/042; H01C7/043
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
59 words
A resistance material consisting of a mixture of at least one metal oxidic compound, a permanent low melting glass or synthetic resin binder and a temporary organic binder, the at least one metal oxide material comprising a metal rhodate as the resistance-determining component, wherein said resistance-determining component consists of thallium rhodate of the formula TlRh 2 O 4 .
Claim 2
Dependent Claim
59 words
A resistance material consisting of a mixture of at least one metal oxidic compound, a permanent low melting glass or synthetic resin binder and a temporary organic binder, the at least one metal oxide material comprising a metal rhodate as the resistance-determining component, wherein said resistance-determining component consists of thallium rhodate of the formula TlRh 2 O 4 .
Claim 3
Dependent Claim
35 words
A material as claimed in claim 1, wherein it further comprises a component having a negative temperature coefficient of the resistance (TCR) in such a quantity that a desired level of the TCR is achieved.
Claim 4
Dependent Claim
32 words
A material as claimed in claim 2, wherein the component having a negative TCR is a metal rhodate of the formula M 3 Rh 7 O 15 , wherein M=Pb or Sr.
Claim 5
Dependent Claim
37 words
A material as claimed in claim 1, wherein in the thallium rhodate part of the thallium is replaced by lead to form the compound of the formula Tl x Pb.sub.(1-x) Rh 2 O 4 , wherein 0.5<x<1.
Claim 6
Dependent Claim
43 words
The resistance material of claim 4 wherein an additional component is present having a temperature coefficient of the resistance (TCR) opposite to that of the thallium rhodate of claim 4 in a quantity such that a desired level of the TCR is achieved.
Claim 7
Dependent Claim
57 words
The resistor formed by applying the resistance material of claim 1 or 2 or 3 or 4 or 5 to a substrate, heating said resistance material to remove said temporary binder and cause said permanent binder to adhere to said substrate to form thereby a coherent body and providing said resultant coherent body with electrically conducting leads.
Claim 8
Dependent Claim
14 words
A compound of the formula Tl x Pb.sub.(1-x) Rh 2 O 4 wherein 0.5≦x≦1.
Claim 9
Dependent Claim
14 words
A compound of the formula Tl x Pb.sub.(1-x) Rh 2 O 4 wherein 0.5≦x≦1.
References Cited (Backward Citations)
US4107387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-25 | 1984-11-24 | 1985-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-25 | 1988-11-24 | 1989-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-25 | 1992-11-24 | 1993-05-26 | $7700.00 | Window Closed / Lapsed |