Patent US4070518A successfully refreshed from Google Patents.
US4070518A
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Copper metallizations
Assignee: EIDP Inc
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Filing: 1976-10-15
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Granted: 1978-01-24
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Expires: 1996-10-15
Abstract
Abstract Copper-based metallizations, useful in the electronics art, comprising copper powder and certain alkali metal/lead borosilicate glass powders. The copper and glass may be dispersed in an inert liquid vehicle, printed on a substrate, and fired in a nitrogen atmosphere to produce conductor patterns. Also the resultant fired conductor patterns.
Inventors
- 👤 Lewis Charles Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:22
CPC Classifications
C; C03; C03C; C03C12/00; H; H01; H01B; H01B1/00; H01B1/14; H01B1/16; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/24926
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
166 words
In compositions of finely divided metal powder and glass binder powder useful for forming conductor patterns on a dielectric substrate, wherein the improvement consists essentially of, as the metal powder, 85- 97 weight % copper powder and, as the glass binder powder, 3-15 weight % of a glass powder comprising 40-70% PbO 0-20% pbF 2 7-27% siO 2 0-5% al 2 O 3 10-20% b 2 o 3 0.25-4% m 2 o wherein M is Na, K and mixtures thereof, provided that the weight of K 2 O is 0-40% of the total weight of K 2 O and Na 2 O, 0-5% ceO 2 0-6% tiO 2 , provided that (1) where the total weight of CeO 2 and TiO 2 is 0-1%, there is at least 5% PbF 2 present; (2) where the weight of PbF 2 is 0-5%, there is at least 1% CeO 2 , TiO 2 or mixtures thereof, and (3) the total weight of PbO and PbF 2 is 50-70%.
Claim 2
Dependent Claim
166 words
In compositions of finely divided metal powder and glass binder powder useful for forming conductor patterns on a dielectric substrate, wherein the improvement consists essentially of, as the metal powder, 85- 97 weight % copper powder and, as the glass binder powder, 3-15 weight % of a glass powder comprising 40-70% PbO 0-20% pbF 2 7-27% siO 2 0-5% al 2 O 3 10-20% b 2 o 3 0.25-4% m 2 o wherein M is Na, K and mixtures thereof, provided that the weight of K 2 O is 0-40% of the total weight of K 2 O and Na 2 O, 0-5% ceO 2 0-6% tiO 2 , provided that (1) where the total weight of CeO 2 and TiO 2 is 0-1%, there is at least 5% PbF 2 present; (2) where the weight of PbF 2 is 0-5%, there is at least 1% CeO 2 , TiO 2 or mixtures thereof, and (3) the total weight of PbO and PbF 2 is 50-70%.
Claim 3
Dependent Claim
59 words
Compositions according to claim 1 wherein the glass comprises 45-55% PbO 8-13% pbF 2 7-20% siO 2 0-1% al 2 O 3 12-20% b 2 o 3 1-3% na 2 O 0.25-1.5 % k 2 o, provided that the total weight of Na 2 O and K 2 O is 0.5-3% 1-3% CeO 2 0-5 % tiO 2 .
Claim 4
Dependent Claim
57 words
Compositions according to claim 3 wherein the glass comprises 45-55% PbO 8-13% pbF 2 7-20% siO 2 0-1% al 2 O 3 13-18% b 2 o 3 1-3% na 2 O 0.25-1.5% k 2 o, provided that the total weight of Na 2 O and K 2 O is 0.5-3% 1-3% CeO 2 2-5% tiO 2 .
Claim 5
Dependent Claim
34 words
Compositions according to claim 1 wherein the glass additionally comprises up to 10% MgO, CaO, SrO, BaO, ZrO 2 , MnO, Fe 2 O 3 , CoO, ZnO, and/or AS 2 O 3 .
Claim 6
Dependent Claim
34 words
Compositions according to claim 2 wherein the glass additionally comprises up to 10% MgO, CaO, SrO, BaO, ZrO 2 , MnO, Fe 2 O 3 , CoO, ZnO, and/or As 2 O 3 .
Claim 7
Dependent Claim
34 words
Compositions according to claim 3 wherein the glass additionally comprises up to 10% MgO, CaO, SrO, BaO, ZrO 2 , MnO, Fe 2 O 3 , CoO, ZnO, and/or As 2 O 3 .
Claim 8
Dependent Claim
24 words
Compositions according to claim 1 wherein the glass additionally comprises up to 5% CdO, SnO, Sb 2 O 3 , and/or WO 3 .
Claim 9
Dependent Claim
24 words
Compositions according to claim 2 wherein the glass additionally comprises up to 5% CdO, SnO, Sb 2 O 3 , and/or WO 3 .
Claim 10
Dependent Claim
24 words
Compositions according to claim 3 wherein the glass additionally comprises up to 5% CdO, SnO, Sb 2 O 3 , and/or WO 3 .
Claim 11
Dependent Claim
13 words
Compositions according to claim 1 of 90-97% copper powder and 3-10% glass powder.
Claim 12
Dependent Claim
11 words
Compositions according to claim 1 dispersed in an inert liquid vehicle.
Claim 13
Dependent Claim
11 words
Compositions according to claim 2 dispersed in an inert liquid vehicle.
Claim 14
Dependent Claim
11 words
Compositions according to claim 3 dispersed in an inert liquid vehicle.
Claim 15
Dependent Claim
13 words
A dielectric substrate bearing a conductor pattern of the composition of claim 1.
Claim 16
Dependent Claim
13 words
A dielectric substrate bearing a conductor pattern of the composition of claim 2.
Claim 17
Dependent Claim
13 words
A dielectric substrate bearing a conductor pattern of the composition of claim 3.
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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) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |