US3865742A
Expired / Lapsed
US
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Resistor Compositions
Assignee: OI Glass Inc
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Filing: 1971-05-06
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Granted: 1975-02-11
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Expires: 1991-05-06
Abstract
Abstract A printed microelectronic resistor having excellent stability, high reproducibility and a TCR less than about + OR - 500 ppm/*C (25*-150*C) is formed from a composition comprised of a glass binder and a silver chloride or cyanide salt free, homogeneous, finely divided powdered admixture of a resistive metal, silver and gold, the powder having a particle size of less than about 5 microns.
Inventors
- 👤 Bernard Greenstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:48
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/06; H01C17/00; H01C17/06; H01C17/065; H01C17/06506; H01C17/06513; H01C17/06526; H01C17/06553; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49099
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
103 words
A RESISTOR COMPOSITION COMPRISING A PARTICULATE ZINC FREE, BORON FREE, LEAD, BARIUM SILICATE GLASS BINDER HAVING A FIRING TEMPERATURE OF ABOUT 725*-775*C AND A POSITIVE TCR, SAID GLASS BINDER BEING ADMIXED WITH A SUBSTANTIALLY HOMOGENEOUS FINELY DIVIDED, SUBSTANTIALLY CHLORIDE OR CYANIDE SALT-FREE POWDER COMPRISED OF AT LEAST ONE RESISTIVE METAL SELECTED FROM THE GROUP CONSISTING OF PALLADIUM, RHODIUM, IRIDIUM, RUTHENIUM, INDIUM AND MIXTURES THEREOF, AT LEAST TWO STABILIZER METALS SELECTED FROM THE GROUP CONSISTING OF SILVER, GOLD AND PLATINUM, AND ABOUT 0.02-0.5 WEIGHT PERCENT RELATED TO THE WEIGHT OF THE METAL POWDER, OF PARTICULATE MNO2 TO REDUCE THE TCR OF SAID RESISTOR COMPOSITION.
Claim 2
Dependent Claim
103 words
A RESISTOR COMPOSITION COMPRISING A PARTICULATE ZINC FREE, BORON FREE, LEAD, BARIUM SILICATE GLASS BINDER HAVING A FIRING TEMPERATURE OF ABOUT 725*-775*C AND A POSITIVE TCR, SAID GLASS BINDER BEING ADMIXED WITH A SUBSTANTIALLY HOMOGENEOUS FINELY DIVIDED, SUBSTANTIALLY CHLORIDE OR CYANIDE SALT-FREE POWDER COMPRISED OF AT LEAST ONE RESISTIVE METAL SELECTED FROM THE GROUP CONSISTING OF PALLADIUM, RHODIUM, IRIDIUM, RUTHENIUM, INDIUM AND MIXTURES THEREOF, AT LEAST TWO STABILIZER METALS SELECTED FROM THE GROUP CONSISTING OF SILVER, GOLD AND PLATINUM, AND ABOUT 0.02-0.5 WEIGHT PERCENT RELATED TO THE WEIGHT OF THE METAL POWDER, OF PARTICULATE MNO2 TO REDUCE THE TCR OF SAID RESISTOR COMPOSITION.
Claim 3
Dependent Claim
29 words
A resistor composition according to claim 1 in which a metal selected from the group consisting of platinum, copper, nickel and mixtures thereof are combined with silver and gold.
Claim 4
Dependent Claim
113 words
A resistor composition according to claim 1 having a TCR less than about 200 ppm/* C (25* - 150*C), wherein said resistor composition comprises about 40 - 95 weight percent of a glass binder having a particle size of less than about 5 microns, wherein said glass binder comprises by weight about: 40 - 75% PbO, 15 - 40% SiO2, 0 - 15% Bi2O3 and 0 - 15% BaO and wherein about 2 - 30% is Bi2O3 + BaO and the listed oxides constitute at least about 90% by weight of the glass composition, and about 5 -60% of said metal powder, said MnO2 having a particle size less than about 5 microns.
Claim 5
Dependent Claim
39 words
A resistor composition according to claim 3 wherein said powder also includes about 5 weight percent of a silica having a particle size of less than about 5 microns as an anti-agglomerating agent substantially homogeneously dispersed throughout the powder.
Claim 6
Dependent Claim
26 words
A resistor composition according to claim 4 wherein said glass binder consists essentially of by weight about: 59% PbO, 31% SiO2, 2% Bi2O3 and 8% BaO.
Claim 7
Dependent Claim
21 words
A resistor composition according to claim 5 wherein said powder consists of by weight: 35% Pd, 52% Ag and 13% Au.
Claim 8
Dependent Claim
18 words
A resistor composition according to claim 4 having a TCR less than about 100 ppm/*C (25* - 150*C.)
Claim 9
Dependent Claim
36 words
A resistor composition according to claim 1 wherein said stabilizer metals are selected from an admixture of the following metals in the indicated weight ratios: Ag:Au, about 4:1-1:4; Pt: Ag, about 8:1-1:8; and Pt:Au, about 8:1-1:8.
Claim 10
Dependent Claim
36 words
A resistor composition according to claim 1 wherein said powder also includes an anti-agglomerating agent substantially homogeneously dispersed throughout the powder, said anti-agglomerating agent being a refractory having a particle size less than about 5 microns.
Claim 11
Dependent Claim
25 words
A resistor composition according to claim 3 wherein at least one of said resistive metals is alloyed with at least one of said stabilizer metals.
Claim 12
Dependent Claim
13 words
A resistor composition according to claim 1 wherein said resistive metal is palladium.
Claim 13
Dependent Claim
23 words
A resistor composition according to claim 11 wherein said stabilizer metals are Ag and Au in a weight ratio of about 4:1-1: 4.
Claim 14
Dependent Claim
13 words
A resistor composition according to claim 12 wherein Ag is alloyed with Pd.
Claim 15
Dependent Claim
46 words
A resistor composition according to claim 1 wherein said glass binder comprises by weight about: 40-75% PbO, 15-40% SiO2, 0-15% Bi2O3 and 0-15% BaO wherein about 2-30% is Bi2O3 + BaO and the listed oxides constitute at least about 90% by weight of the glass composition.
Claim 16
Dependent Claim
26 words
A resistor composition according to claim 14 wherein said glass binder consists essentially of by weight about: 59% PbO, 31% SiO2, 2% Bi2O3, and 8% BaO.
Claim 17
Dependent Claim
34 words
A resistor composition according to claim 1 wherein said powder is comprised of by weight about 5-95% of at least one resistive metal and 95-5% by weight of said at least two stabilizer metals.
Claim 18
Dependent Claim
24 words
A resistor composition according to claim 16 wherein said resistor metal is palladium in an amount by weight of about 15-75% of said powder.
Claim 19
Dependent Claim
22 words
A resistor composition according to claim 17 wherein said palladium is in an amount by weight of about 20-65% of said powder.
Claim 20
Dependent Claim
49 words
A resistor composition according to claim 16 wherein said powder also includes an anti-agglomerating agent in an amount by weight of about 0.5-15% of said powder, said anti-agglomerating agent being substantially homogeneously dispersed throughout the powder and said anti-agglomerating agent having a particle size less than about 5 microns.
Claim 21
Dependent Claim
26 words
A resistor composition according to claim 19 wherein said anti-agglomerating agent is finely divided silica in an amount by weight of about 5% of said powder.
Claim 22
Dependent Claim
24 words
A resistor composition according to claim 33 which comprises by weight about 40 - 95% glass binder and about 5 - 60% metal powder.
Claim 23
Dependent Claim
70 words
A resistor composition according to claim 1 wherein said powder was formulated by initially forming a soluble salt solution of at least one resistive metal and silver, adding to said solution a finely divided gold powder having a particle size of less than about 5 microns, forming a slurry of said solution and gold powder, and adding a reducing agent to said slurry to precipitate metallic silver and resistive metal.
Claim 24
Dependent Claim
13 words
A resistor composition according to claim 22 wherein said resistive metal is palladium.
Claim 25
Dependent Claim
16 words
A printing resistor paste comprised of a liquid organic vehicle and the composition of claim 1.
Claim 26
Dependent Claim
24 words
A printing resistor paste according to claim 24 wherein said vehicle consists essentially of diethylene glycol monobutyl ether acetate, iso-amyl salicylate and ethyl cellulose.
Claim 27
Dependent Claim
30 words
A printing resistor paste according to claim 25 wherein said resistor composition is in an amount of about 5-2 parts by weight per 1 part by weight of said vehicle.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |