US4172919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper conductor compositions containing copper oxide and Bi2 O3
Assignee: EIDP Inc
•
Filing: 1978-06-16
•
Granted: 1979-10-30
•
Expires: 1998-06-16
Abstract
Abstract Compositions useful for making electrical conductor patterns on a nonconductive (dielectric) substrate, the compositions comprising certain proportions of finely divided copper, copper oxide and glass powders, dispersed in a vehicle. The compositions may be printed on a substrate and fired in a neutral atmosphere to produce conductor patterns adherent to the substrate.
Inventors
- 👤 James D. Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:37
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; Y10T428/24; Y10T428/24802; Y10T428/24917
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
93 words
A copper conductor composition fireable in a neutral atmosphere to produce a solderable, adherent conductor pattern on a dielectric substrate, said composition comprising finely divided inorganic particles dispersed in an inert liquid vehicle, said inorganic particles consisting essentially of, by weight, (a) 86-97% copper, (b) 1-7% copper oxide, (c) 1-7% glass comprising 75% or more of Bi 2 O 3 , the total weight of (b) and (c) being in the range 3-14%, provided that where the total weight of (b) and (c) is 3%, it is of 2% (b) and 1% (c).
Claim 2
Dependent Claim
93 words
A copper conductor composition fireable in a neutral atmosphere to produce a solderable, adherent conductor pattern on a dielectric substrate, said composition comprising finely divided inorganic particles dispersed in an inert liquid vehicle, said inorganic particles consisting essentially of, by weight, (a) 86-97% copper, (b) 1-7% copper oxide, (c) 1-7% glass comprising 75% or more of Bi 2 O 3 , the total weight of (b) and (c) being in the range 3-14%, provided that where the total weight of (b) and (c) is 3%, it is of 2% (b) and 1% (c).
Claim 3
Dependent Claim
14 words
A composition according to claim 1 of 90-97% (a), 1-7% (b), and 1-7% (c).
Claim 4
Dependent Claim
19 words
A composition according to claim 1 wherein the total weight of (b) and (c) is in the range 3-11%.
Claim 5
Dependent Claim
19 words
A composition according to claim 2 wherein the total weight of (b) and (c) is in the range 3-11%.
Claim 6
Dependent Claim
19 words
A composition according to claim 1 wherein glass (c) comprises at least 80% of Bi 2 O 3 .
Claim 7
Dependent Claim
18 words
A composition according to claim 3 wherein glass (c) comprises at least 80% Bi 2 O 3 .
Claim 8
Dependent Claim
12 words
A composition according to claim 1 wherein (b) is Cu 2 O.
Claim 9
Dependent Claim
10 words
A composition according to claim 1 wherein (b) is CuO.
Claim 10
Dependent Claim
17 words
A composition according to claim 1 of 80-90% said inorganic particles and 10-20% said inert liquid vehicle.
Claim 11
Dependent Claim
15 words
A composition according to claim 1 of about 93% (a), 3.5% (b), and 3.5% (c).
Claim 12
Dependent Claim
16 words
A dielectric substrate having adherent thereto a sintered composition of the inorganic particles of claim 1.
Claim 13
Dependent Claim
16 words
A dielectric substrate having adherent thereto a sintered composition of the inorganic particles of claim 2.
Claim 14
Dependent Claim
16 words
A dielectric substrate having adherent thereto a sintered composition of the inorganic particles of claim 10.
References Cited (Backward Citations)
US2993815A
Cited
US3293501A
Cited
US3450545A
Cited
US3794518A
Cited
DE2424579A1
Cited
US4072771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-29 | 1983-04-30 | 1983-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-29 | 1987-04-30 | 1987-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-29 | 1991-04-30 | 1991-10-30 | $7700.00 | Window Closed / Lapsed |