Patent US4187201A successfully refreshed from Google Patents.
US4187201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thick film conductors
Assignee: National Starch and Chemical Investment Holding Corp
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Filing: 1978-03-15
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Granted: 1980-02-05
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Expires: 1998-03-15
Abstract
Abstract A method of improving the physical characteristics of a conductor paste includes the step of adding ZnO in an amount sufficient to achieve about 1% to 3%, by weight, of the total. Where the conductor paste is adapted to be fired at 850° C., ZnO is added in an amount sufficient to achieve about 2% of the total, and where the conductor paste is adapted to be fired at 985° C., ZnO is added in an amount sufficient to achieve about 3% of the total. Several conductor pastes, based on different conductive metal systems and including ZnO, exhibit unusual and surprisingly beneficial results.
Inventors
- 👤 David G. Hilson
- 👤 Peter A. Tulipan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:33
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H01; H01B; H01B1/00; H01B1/14; H01B1/16; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
59 words
A conductor paste comprising: a conductive metal consisting essentially of one member of the group consisting of Cu, Au, Au combined with Pt and Pd, Ag combined with Pd, and Ag combined with Pd and Pt; a vehicle; and a flux, said flux including ZnO in an amount equal to about 1% to 3% by weight of the total.
Claim 2
Dependent Claim
59 words
A conductor paste comprising: a conductive metal consisting essentially of one member of the group consisting of Cu, Au, Au combined with Pt and Pd, Ag combined with Pd, and Ag combined with Pd and Pt; a vehicle; and a flux, said flux including ZnO in an amount equal to about 1% to 3% by weight of the total.
Claim 3
Dependent Claim
67 words
A conductor paste adapted to be fired at 850° C., said conductor paste comprising: a conductive metal consisting essentially of one member of the group consisting of Cu, Au, Au combined with Pt and Pd, Ag combined with Pd, and Ag combined with Pd and Pt; a vehicle; and a flux, said flux including ZnO in an amount equal to about 2%, by weight, of the total.
Claim 4
Dependent Claim
67 words
A conductor paste adapted to be fired at 850° C., said conductor paste comprising: a conductive metal consisting essentially of one member of the group consisting of Cu, Au, Au combined with Pt and Pd, Ag combined with Pd, and Ag combined with Pd and Pt; a vehicle; and a flux, said flux including ZnO in an amount equal to about 2%, by weight, of the total.
Claim 5
Dependent Claim
67 words
A conductor paste adapted to be fired at 985° C., said conductor paste comprising: a conductive metal consisting essentially of one member of the group consisting of Cu, Au, Au combined with Pt and Pd, Ag combined with Pd, and Ag combined with Pd and Pt; a vehicle; and a flux, said flux including ZnO in an amount equal to about 3%, by weight, of the total.
Claim 6
Dependent Claim
67 words
A conductor paste adapted to be fired at 985° C., said conductor paste comprising: a conductive metal consisting essentially of one member of the group consisting of Cu, Au, Au combined with Pt and Pd, Ag combined with Pd, and Ag combined with Pd and Pt; a vehicle; and a flux, said flux including ZnO in an amount equal to about 3%, by weight, of the total.
Claim 7
Dependent Claim
49 words
An electrical conductor formed by depositing the conductor paste of claim 1 or claim 2 or claim 3 onto a substrate, and firing said conductor paste at a temperature sufficient to burn off the vehicle included in such conductor paste, and leave a conductive pattern bonded to said substrate.
Claim 8
Dependent Claim
61 words
A conductor paste comprising, by weight: about 70% metal, said metal being composed of Ag and Pd in the ratio of about 3 to 1; about 16% vehicle; and about 14% flux, said flux being composed of about 2% of the total paste ZnO, and Bi 2 O 3 and powdered glass frit in the ratio of about 2 to 1.
Claim 9
Dependent Claim
61 words
A conductor paste comprising, by weight: about 70% metal, said metal being composed of Ag and Pd in the ratio of about 3 to 1; about 16% vehicle; and about 14% flux, said flux being composed of about 2% of the total paste ZnO, and Bi 2 O 3 and powdered glass frit in the ratio of about 2 to 1.
Claim 10
Dependent Claim
66 words
A conductor paste comprising, by weight: about 72% metal, said metal being composed of Pt, Pd and Au in the ratio of about 1 to 1 to 6; about 13% vehicle; and about 15% flux, said flux being composed of about 1.7% of the total paste ZnO, and Bi 2 O 3 and powdered glass frit in the ratio of slightly greater than 1 to 1.
Claim 11
Dependent Claim
66 words
A conductor paste comprising, by weight: about 72% metal, said metal being composed of Pt, Pd and Au in the ratio of about 1 to 1 to 6; about 13% vehicle; and about 15% flux, said flux being composed of about 1.7% of the total paste ZnO, and Bi 2 O 3 and powdered glass frit in the ratio of slightly greater than 1 to 1.
Claim 12
Dependent Claim
44 words
A conductor paste comprising, by weight: about 72% Cu; about 15% vehicle; and about 13% flux, said flux composed of about 2% of the total paste ZnO, and Bi 2 O 3 and powdered glass frit in the ratio of about 2 to 1.
Claim 13
Dependent Claim
44 words
A conductor paste comprising, by weight: about 72% Cu; about 15% vehicle; and about 13% flux, said flux composed of about 2% of the total paste ZnO, and Bi 2 O 3 and powdered glass frit in the ratio of about 2 to 1.
Claim 14
Dependent Claim
45 words
A conductor paste comprising, by weight: about 85% Au; about 7% vehicle; and about 8% flux, said flux being composed of about 1.4% of the total paste ZnO, and Bi 2 O 3 and powdered glass frit in the ratio of about 2 to 1.
Claim 15
Dependent Claim
45 words
A conductor paste comprising, by weight: about 85% Au; about 7% vehicle; and about 8% flux, said flux being composed of about 1.4% of the total paste ZnO, and Bi 2 O 3 and powdered glass frit in the ratio of about 2 to 1.
Claim 16
Dependent Claim
64 words
A conductor paste comprising, by weight: about 70% metal, said metal being composed of Pt, Pd and Ag in the ratio of about 1 to 5 to 29; about 15% vehicle; and about 15% flux, said flux being composed of about 1.9% of the total paste ZnO, and Bi 2 O 3 and powdered glass frit in the ratio of about 2 to 1.
Claim 17
Dependent Claim
64 words
A conductor paste comprising, by weight: about 70% metal, said metal being composed of Pt, Pd and Ag in the ratio of about 1 to 5 to 29; about 15% vehicle; and about 15% flux, said flux being composed of about 1.9% of the total paste ZnO, and Bi 2 O 3 and powdered glass frit in the ratio of about 2 to 1.
Claim 18
Dependent Claim
61 words
A conductor paste comprising, by weight: about 69% metal, said metal being composed of Pd and Ag in the ratio of about 6 to 11; about 15% vehicle, and about 16% flux, said flux being composed of about 3% of the total paste ZnO, and Bi 2 O 3 and powdered glass frit in the ratio of about 2 to 1.
Claim 19
Dependent Claim
61 words
A conductor paste comprising, by weight: about 69% metal, said metal being composed of Pd and Ag in the ratio of about 6 to 11; about 15% vehicle, and about 16% flux, said flux being composed of about 3% of the total paste ZnO, and Bi 2 O 3 and powdered glass frit in the ratio of about 2 to 1.
Claim 20
Dependent Claim
64 words
A conductor paste comprising, by weight: about 70% metal, said metal being composed of Pt, Pd and Ag in the ratio of about 1 to 3 to 31; about 15% vehicle; and about 15% flux, said flux being composed of about 2% of the total paste ZnO, and Bi 2 O 3 and powdered glass frit in the ratio of about 2 to 1.
Claim 21
Dependent Claim
64 words
A conductor paste comprising, by weight: about 70% metal, said metal being composed of Pt, Pd and Ag in the ratio of about 1 to 3 to 31; about 15% vehicle; and about 15% flux, said flux being composed of about 2% of the total paste ZnO, and Bi 2 O 3 and powdered glass frit in the ratio of about 2 to 1.
Claim 22
Dependent Claim
85 words
In a conductor paste comprising, by weight: about 75% metal, said metal being composed of Pt, Pd and Au in the ratio of about 1 to 1 to 6; about 14% vehicle; and about 11% flux, said flux being composed of about 1.4% of the total paste CuO, and Bi 2 O 3 and powdered glass frit in a ratio of about 2 to 1, the improvement comprising the step of adding ZnO in an amount sufficient to achieve about 2% of the total paste.
Claim 23
Dependent Claim
85 words
In a conductor paste comprising, by weight: about 75% metal, said metal being composed of Pt, Pd and Au in the ratio of about 1 to 1 to 6; about 14% vehicle; and about 11% flux, said flux being composed of about 1.4% of the total paste CuO, and Bi 2 O 3 and powdered glass frit in a ratio of about 2 to 1, the improvement comprising the step of adding ZnO in an amount sufficient to achieve about 2% of the total paste.
Claim 24
Dependent Claim
95 words
In a conductor paste comprising, by weight: about 75% metal, said metal being composed of Pd and Ag in a ratio of about 13 to 24; about 12% vehicle; and about 13% flux, said flux being composed of about 1.5% of the total paste CuO/TiO 2 /Al 2 O 3 mixture, about 3.7% of the total paste CdO and Bi 2 O 3 and powdered glass frit in the ratio of about 1 to 1, the improvement comprising the step of adding ZnO in an amount sufficient to achieve about 2% of the total paste.
Claim 25
Dependent Claim
95 words
In a conductor paste comprising, by weight: about 75% metal, said metal being composed of Pd and Ag in a ratio of about 13 to 24; about 12% vehicle; and about 13% flux, said flux being composed of about 1.5% of the total paste CuO/TiO 2 /Al 2 O 3 mixture, about 3.7% of the total paste CdO and Bi 2 O 3 and powdered glass frit in the ratio of about 1 to 1, the improvement comprising the step of adding ZnO in an amount sufficient to achieve about 2% of the total paste.
Claim 26
Dependent Claim
52 words
An electrical conductor formed by depositing the conductor paste of claim 5 or claim 6 or claim 7 or claim 8 or claim 9 or claim 10 onto a substrate, firing said conductor paste at a temperature sufficient to burn off said vehicle and leave a conductive pattern bonded to said substrate.
Claim 27
Dependent Claim
41 words
An electrical conductor formed by depositing the improved conductor paste of claim 12 or claim 13 onto a substrate, firing said conductor paste at a temperature sufficient to burn off said vehicle and leave a conductive pattern bonded to said vehicle.
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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) | 1983-02-04 | 1983-08-06 | 1984-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-04 | 1987-08-06 | 1988-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-04 | 1991-08-06 | 1992-02-05 | $7700.00 | Window Closed / Lapsed |