US4051074A
Expired / Lapsed
US
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Resistor composition and method for its manufacture
Assignee: Shoei Chemical Inc
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Filing: 1975-10-29
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Granted: 1977-09-27
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Expires: 1995-10-29
Abstract
Abstract A resistor composition and process for making the same which comprises a conductive material, a glass frit and a vehicle therefor or a conductive material, a glass frit, an insulating or semiconductive metal oxide and a vehicle therefor, the weight ratio of said conductive material, said glass frit and said metal oxide, when the latter is present, being maintained substantially constant, wherein the resistance value of said composition is established by varying the total surface area of said conductive material, and said glass frit and, when applicable, said metal oxide, without changing the temperature coefficient of resistance of said composition.
Inventors
- 👤 Eiichi Asada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:30
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/06; H01C17/065
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
110 words
A process for varying the resistance value of a resistor composition containing 10-60 parts by weight of a conductive material selected from the group consisting of gold, silver, platinum, rhodium, ruthenium, osmium, iridium, vanadium, tin, tungsten, carbon and alloys, mixtures and oxides thereof, said conductive material having a known specific surface area, 90-40 parts by weight of a glass frit having a known specific surface area, and a vehicle therefor which comprises increasing or decreasing the total surface area of said conductive material and glass frit while maintaining the weight ratio of said conductive material to said glass frit constant without changing the temperature coefficient of resistance of said composition.
Claim 2
Dependent Claim
110 words
A process for varying the resistance value of a resistor composition containing 10-60 parts by weight of a conductive material selected from the group consisting of gold, silver, platinum, rhodium, ruthenium, osmium, iridium, vanadium, tin, tungsten, carbon and alloys, mixtures and oxides thereof, said conductive material having a known specific surface area, 90-40 parts by weight of a glass frit having a known specific surface area, and a vehicle therefor which comprises increasing or decreasing the total surface area of said conductive material and glass frit while maintaining the weight ratio of said conductive material to said glass frit constant without changing the temperature coefficient of resistance of said composition.
Claim 3
Dependent Claim
122 words
The process for varying the resistance value of a resistor composition of claim 1, said resistor composition further containing an insulating or semiconductive metal oxide selected from the group consisting of palladium oxide, copper oxide, aluminum oxide, zinc oxide, iron oxide, chromium oxide, cobalt oxide, tantalum oxide, nickel oxide, niobium oxide, silicon oxide, and mixtures thereof, said conductive material, glass frit, and insulating or semiconductive metal oxide each having known specific surface areas, wherein the total surface area of said conductive material, glass frit and insulating or semiconductive metal oxide is increased or decreased while maintaining the weight ratio of said conductive material, glass frit and insulating or semiconductive metal oxide constant without changing the temperature coefficient of resistance of said composition.
Claim 4
Dependent Claim
32 words
The process of claim 2, wherein the specific surface area of the conductive material, glass frit and the insulating or semiconductive metal oxide varies from 0.02 to about 270 m 2 /g.
Claim 5
Dependent Claim
29 words
The process of claim 2, wherein the conductive material, the glass frit and the insulating or semiconductive metal oxide have a diameter of about 100 A to 50 microns.
Claim 6
Dependent Claim
19 words
The process of claim 1, wherein the glass frit is selected from the group consisting of borosilicates and lead-borosilicates.
Claim 7
Dependent Claim
23 words
The process of claim 1, wherein the conductive material and the glass frit have a diameter of about 100 A to 50 microns.
Claim 8
Dependent Claim
27 words
The process of claim 1, wherein the specific surface area of the conductive material and the glass frit varies from 0.02 to about 30 m 2 /g.
Claim 9
Dependent Claim
45 words
The process of claim 1, wherein the specific surface area of one of the components is increased or decreased and the specific surface area of the other component is maintained constant while keeping the weight ratio of said conductive material to said glass frit constant.
Claim 10
Dependent Claim
51 words
The process of claim 2, wherein the specific surface area of one or two components is increased or decreased whereas the specific surface area of the residual component or components is maintained constant while keeping the weight ratio of said conductive material, glass frit and insulating or semiconductive metal oxide constant.
References Cited (Backward Citations)
US3865742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |