US4053866A
Expired / Lapsed
US
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Electrical resistor with novel termination and method of making same
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1975-11-24
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Granted: 1977-10-11
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Expires: 1995-11-24
Abstract
Abstract An electrical resistor and method of making same including a substrate of an electrical insulating material having on a surface thereof a film of a resistance material and a termination film of a conductive material at each end of the resistance film. The resistance film is preferably a layer of a glass having embedded therein conductive particles such as tantalum nitride and tantalum or tungsten carbide and tungsten. The termination film contains either molybdenum, tungsten or a mixture thereof.
Inventors
- 👤 Kenneth M. Merz
- 👤 Howard E. Shapiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:48
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/28; H01C1/00; H01C1/14; H01C17/281; H01C17/283; H01C7/00; H01C7/003; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49101
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
52 words
An electrical resistor comprising a substrate of an electrical insulating material, a termination on and directly adhering to said substrate, said termination being a conductive material selected from the group consisting of molybdenum, tungsten and mixtures of molydenum and tungsten, and a resistance material film on said substrate and contacting the termination.
Claim 2
Dependent Claim
52 words
An electrical resistor comprising a substrate of an electrical insulating material, a termination on and directly adhering to said substrate, said termination being a conductive material selected from the group consisting of molybdenum, tungsten and mixtures of molydenum and tungsten, and a resistance material film on said substrate and contacting the termination.
Claim 3
Dependent Claim
75 words
An electrical resistor comprising a substrate of an electrical insulating material, a termination on and directly adhering to said substrate, said termination being a conductive material selected from the group consisting of molybdenum, tungsten and mixtures of molybdenum and tungsten, and a resistance material film on said substrate and contacting the termination, said resistance material film comprising a layer of glass having particles of a conductive material embedded in and dispersed throughout the glass layer.
Claim 4
Dependent Claim
75 words
An electrical resistor comprising a substrate of an electrical insulating material, a termination on and directly adhering to said substrate, said termination being a conductive material selected from the group consisting of molybdenum, tungsten and mixtures of molybdenum and tungsten, and a resistance material film on said substrate and contacting the termination, said resistance material film comprising a layer of glass having particles of a conductive material embedded in and dispersed throughout the glass layer.
Claim 5
Dependent Claim
25 words
An electrical resistor in accordance with claim 2 in which the conductive particles are a mixture of a refractory metal and a refractory metal nitride.
Claim 6
Dependent Claim
21 words
An electrical resistor in accordance with claim 3 in which the conductive particles are a mixture of tantalum nitride and tantalum.
Claim 7
Dependent Claim
25 words
An electrical resistor in accordance with claim 2 in which the conductive particles are a mixture of a refractory metal and a refractory metal carbide.
Claim 8
Dependent Claim
21 words
An electrical resistor in accordance with claim 5 in which the conductive particles are a mixture of tungsten carbide and tungsten.
Claim 9
Dependent Claim
37 words
An electrical resistor in accordance with claim 1 including a pair of spaced terminations on the substrate and in which the resistance material film extends between and overlaps at least a portion of each of the terminations.
Claim 10
Dependent Claim
95 words
An electrical resistor comprising a substrate of an electrical insulating material, a termination on said substrate, said termination containing a conductive material selected from the group consisting of molybdenum, tungsten and mixture of molybdenum and tungsten, a resistance material film on said substrate and contacting the termination, p1 the termination including a pair of spaced terminations on the substrate with the resistance material film extending between and overlapping a portion of each of the terminations, and a film of nickel on the portions of the terminations which are not overlapped by the resistance material film.
Claim 11
Dependent Claim
95 words
An electrical resistor comprising a substrate of an electrical insulating material, a termination on said substrate, said termination containing a conductive material selected from the group consisting of molybdenum, tungsten and mixture of molybdenum and tungsten, a resistance material film on said substrate and contacting the termination, p1 the termination including a pair of spaced terminations on the substrate with the resistance material film extending between and overlapping a portion of each of the terminations, and a film of nickel on the portions of the terminations which are not overlapped by the resistance material film.
Claim 12
Dependent Claim
33 words
An electrical resistor in accordance with claim 8 in which the resistance material film comprises a layer of glass having particles of a conductive material embedded in and dispersed throughout the glass layer.
Claim 13
Dependent Claim
21 words
An electrical resistor in accordance with claim 9 in which the conductive particles are a mixture of tantalum nitride and tantalum.
Claim 14
Dependent Claim
21 words
An electrical resistor in accordance with claim 9 in which the conductive particles are a mixture of tungsten carbide and tungsten.
Claim 15
Dependent Claim
57 words
An electrical resistor comprising a substrate of an electrical insulating material, a termination on and directly adhering to said substrate, said termination being a fired film of a conductive material selected from the group consisting of molybdenum, tungsten, molybdenum and manganese, and titanium and molybdenum, and a resistance material film on said substrate and contacting said termination.
Claim 16
Dependent Claim
57 words
An electrical resistor comprising a substrate of an electrical insulating material, a termination on and directly adhering to said substrate, said termination being a fired film of a conductive material selected from the group consisting of molybdenum, tungsten, molybdenum and manganese, and titanium and molybdenum, and a resistance material film on said substrate and contacting said termination.
Claim 17
Dependent Claim
65 words
An electrical resistor comprising a substrate of an electrical insulating material, a termenation on said substrate, said termination being a film of conductive material selected from the group consisting of molybdenum, tungsten, molybdenum and manganese, and titanium and molybdenum, fired at a temperature between 1450° C. and 1620° C. in a reducing atmosphere, and a resistance material film on said substrate and contacting said termination.
Claim 18
Dependent Claim
65 words
An electrical resistor comprising a substrate of an electrical insulating material, a termenation on said substrate, said termination being a film of conductive material selected from the group consisting of molybdenum, tungsten, molybdenum and manganese, and titanium and molybdenum, fired at a temperature between 1450° C. and 1620° C. in a reducing atmosphere, and a resistance material film on said substrate and contacting said termination.
Claim 19
Dependent Claim
33 words
An electrical resistor in accordance with claim 13 in which the resistance material film comprises a layer of glass having particles of a conductive material embedded in and dispersed throughout the glass layer.
Claim 20
Dependent Claim
21 words
An electrical resistor in accordance with claim 13 in which the conductive particles are a mixture of tantalum nitride and tantalum.
Claim 21
Dependent Claim
21 words
An electrical resistor in accordance with claim 14 in which the conductive particles are a mixture of tungsten carbide and tungsten.
Claim 22
Independent Claim
89 words
A method of making an electrical resistor comprising the steps of applying to a substrate of an electrical insulating material over a pair of spaced areas a termination material of particles of a conductive material selected from the group consisting of molybdenum, tungsten, and respective mixtures of molybdenum and tungsten, molybdenum and titanium, and molybdenum and manganese in a vehicle, firing said termination material to form terminations containing the conductive material bonded to the substrate, and applying a resistance material film to said substrate between and contacting said terminations.
Claim 23
Independent Claim
89 words
A method of making an electrical resistor comprising the steps of applying to a substrate of an electrical insulating material over a pair of spaced areas a termination material of particles of a conductive material selected from the group consisting of molybdenum, tungsten, and respective mixtures of molybdenum and tungsten, molybdenum and titanium, and molybdenum and manganese in a vehicle, firing said termination material to form terminations containing the conductive material bonded to the substrate, and applying a resistance material film to said substrate between and contacting said terminations.
Claim 24
Dependent Claim
26 words
The method in accordance with claim 17 in which the termination material is fired at a temperature between 1450° and 1620° C. in a reducing atmosphere.
Claim 25
Dependent Claim
35 words
The method in accordance with claim 18 in which the reducing atmosphere is moist dissociated ammonia and prior to firing the termination material it is dried at a temperature of between 100° and 150° C.
Claim 26
Dependent Claim
57 words
The method in accordance with claim 19 in which the resistance material film applied to the substrate is a mixture of a glass frit, particles of a conductive material and a vehicle, and the mixture is fired at a temperature at which the glass melts to form a layer of glass having the conductive particles embedded therein.
Claim 27
Dependent Claim
83 words
An electrical resistor made by applying to a substrate of an electrical insulating material over a pair of spaced areas a termination material of particles of a conductive material selected from the group consisting of molybdenum, tungsten, and respective mixtures of molybdenum and tungsten, molybdenum and titanium, and molybdenum and manganese in a vehicle, firing said termination material to form terminations containing the conductive material bonded to the substrate, and applying a resistance material film to said substrate between and contacting said terminations.
Claim 28
Dependent Claim
83 words
An electrical resistor made by applying to a substrate of an electrical insulating material over a pair of spaced areas a termination material of particles of a conductive material selected from the group consisting of molybdenum, tungsten, and respective mixtures of molybdenum and tungsten, molybdenum and titanium, and molybdenum and manganese in a vehicle, firing said termination material to form terminations containing the conductive material bonded to the substrate, and applying a resistance material film to said substrate between and contacting said terminations.
Claim 29
Dependent Claim
28 words
An electrical resistor made in accordance with claim 21 in which the termination material is fired at a temperature between 1450° and 1620° C. in a reducing atmosphere.
Claim 30
Dependent Claim
37 words
An electrical resistor made in accordance with claim 22 in which the reducing atmosphere in moist dissociated ammonia and prior to firing the termination material it is dried at a temperature of between 100° and 150° C.
Claim 31
Dependent Claim
59 words
An electrical resistor made in accordance with claim 23 in which the resistance material film applied to the substrate is a mixture of a glass frit, particles of a conductive material and a vehicle, and the mixture is fired at a temperature at which the glass melts to form a layer of glass having the conductive particles embedded therein.
References Cited (Backward Citations)
US3051592A
Cited
US3620799A
Cited
US3661599A
Cited
US3833842A
Cited
US3649945A
Cited
US3729406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |