Patent US684423A successfully refreshed from Google Patents.
Patent US4394171A successfully refreshed from Google Patents.
US4394171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thick film conductor compositions
Assignee: EIDP Inc
•
Filing: 1982-03-10
•
Granted: 1983-07-19
•
Expires: 2002-03-10
Abstract
Abstract Metallization suitable for making printed thick film terminations comprising an admixture of finely divided particles of palladium/silver as the conductive phase and bismuth-free low-melting, low viscosity devitrifiable glass as the binder phase. The composition optionally contains a spinel-forming metal oxide to raise substrate adhesion.
Inventors
- 👤 Kumaran M. Nair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:28
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; C; C03; C03C; C03C10/00; C03C10/0054; C03C3/00; C03C3/04; C03C3/062; C03C3/07; C03C3/072; C03C3/12; C03C3/14; C03C3/142; C03C3/253; C03C8/00; C03C8/02; C03C8/10; C03C8/14; C03C8/18; C22; C22C; C22C32/00; C22C32/0089; H01; H01B; H01B1/00; H01B1/14; H01B1/16; H01G; H01G4/00; H01G4/002; H01G4/005; H01G4/008; H01G4/0085
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
78 words
A palladium/silver metallization suitable for the manufacture of printed terminations, which is an admixture of: A. 50-95% by weight finely divided particles of metallic materials comprising by weight (1) 6 to 60 parts palladium metal; (2) 94 to 40 parts silver metal or alloys thereof in the same proportions; and B. 5-50% by weight finely divided particles of a bismuth-free low-melting, low viscosity devitrifiable glass comprising 50-80% by weight Pb 3 O 4 and 10-30% GeO 2 .
Claim 2
Dependent Claim
78 words
A palladium/silver metallization suitable for the manufacture of printed terminations, which is an admixture of: A. 50-95% by weight finely divided particles of metallic materials comprising by weight (1) 6 to 60 parts palladium metal; (2) 94 to 40 parts silver metal or alloys thereof in the same proportions; and B. 5-50% by weight finely divided particles of a bismuth-free low-melting, low viscosity devitrifiable glass comprising 50-80% by weight Pb 3 O 4 and 10-30% GeO 2 .
Claim 3
Dependent Claim
17 words
The metallization of claim 1 in which the weight ratio of Pd/Ag is from 0.06 to 1.5.
Claim 4
Dependent Claim
27 words
The metallization of claim 1 which also contains 0.1-10% by weight inorganic metal oxide capable of reacting with Al 2 O 3 to form a spinel structure.
Claim 5
Dependent Claim
33 words
The metallization of claim 3 in which the spinel-forming component is an oxide or oxide precursor of a divalent metal selected from the group consisting of Zn, Mg, Co, Ni, Fe and Mn.
Claim 6
Dependent Claim
20 words
A screen-printable paste comprising 82-97% by weight of the metallization of claim 1 dispersed in 3-18% by weight organic medium.
Claim 7
Dependent Claim
20 words
The screen-printable paste of claim 5 in which the organic medium is a solution of ethyl cellulose and beta terpineol.
Claim 8
Dependent Claim
18 words
The screen-printable paste of claim 5 in which the weight ratio of Pd/Ag is from 0.06 to 1.5.
Claim 9
Dependent Claim
27 words
The screen-printable paste of claim 6 in which the glass contains by weight 50-80% by weight Pb 3 O 4 and 10-30% by weight GeO 2 .
Claim 10
Dependent Claim
28 words
The screen-printable paste of claim 5 which also contains 0.1-10% by weight inorganic metal oxide capable of reacting with Al 2 O 3 to form a spinel structure.
Claim 11
Dependent Claim
34 words
The screen-printable paste of claim 9 in which the spinel-forming component is an oxide or oxide precursor of a divalent metal selected from the group consisting of Zn, Mg, Co, Ni, Fe and Mn.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-18 | 1987-01-17 | 1987-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-18 | 1991-01-17 | 1991-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-18 | 1995-01-17 | 1995-07-19 | $7700.00 | Window Closed / Lapsed |