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US4793946A
Expired / Lapsed
US
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Thin print etchable gold conductor composition
Assignee: BASF Catalysts LLC
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Filing: 1986-10-06
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Granted: 1988-12-27
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Expires: 2006-10-06
Abstract
Abstract A thin print etchable gold conductor composition for use in metallizing surfaces of substrates, particularly those used in the construction of miniaturized high density circuits is disclosed. The composition is formulated in such a manner so that it is capable of being printed onto a surface of a substrate as a very thin film.
Inventors
- 👤 King F. Hsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:09
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H01; H01B; H01B1/00; H01B1/14; H01B1/16
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
86 words
A gold conductor composition for use in printing thin films on a substrate comprising a gold material containing about 50-95 percent by weight gold powder and about 50-5 percent gold by weight flakes, the gold powder having a particle size of about 0.1 to 0.9 microns and the gold flakes having a particle size of no more than about 3.0 microns, a binder and an organic vehicle, the gold material being present in an amount of about 70 to 95 percent by weight of the composition.
Claim 2
Dependent Claim
86 words
A gold conductor composition for use in printing thin films on a substrate comprising a gold material containing about 50-95 percent by weight gold powder and about 50-5 percent gold by weight flakes, the gold powder having a particle size of about 0.1 to 0.9 microns and the gold flakes having a particle size of no more than about 3.0 microns, a binder and an organic vehicle, the gold material being present in an amount of about 70 to 95 percent by weight of the composition.
Claim 3
Dependent Claim
20 words
The gold conductor composition of claim 1, wherein the gold material comprises 80 to 95% by weight of the composition.
Claim 4
Dependent Claim
32 words
A process for printing a gold material on a substrate comprising printing the gold conductor composition of claim 1 on a substrate to a thickness of no more than about 6 microns.
Claim 5
Dependent Claim
20 words
The composition of claim 1, wherein the binder contains at least one of cadmium oxide, bismuth oxide and rhodium oxide.
Claim 6
Dependent Claim
23 words
The composition of claim 1, wherein the gold material comprises about 75 to 90 percent gold powder and about 25-10 percent gold flake.
Claim 7
Dependent Claim
19 words
The composition of claim 2, wherein the binder and organic vehicle are present in the form of a paste.
Claim 8
Dependent Claim
61 words
The composition of claim 1, wherein the gold material comprises particles wherein about 95 percent of the particles are less than about 2-4 microns in diamemter, about 90 percent of the particles are less than about 1.8-3.0 microns in diameter, 50 percent are less than about 1.2-2.1 microns in diameter and 10 percent are less than about 0.7-1.4 microns in diameter.
Claim 9
Dependent Claim
22 words
The composition of claim 1, wherein the tap density of the gold material is from about 4.0 to 8.0 g/cm 3 .
Claim 10
Dependent Claim
13 words
The composition of claim 1, wherein the composition additionally contains a fluxing material.
Claim 11
Dependent Claim
29 words
The composition of claim 9, wherein the fluxing material comprises a resinate selected from the group consisting of copper ethylhexanoate, cadmium 2-ethylhexoate, bismuth neodecanoate, vanadium 2-ethylhexanoate and rhodium 2-ethylhexanoate.
Claim 12
Dependent Claim
11 words
The process of claim 3, wherein the printing is screen printing.
Claim 13
Dependent Claim
32 words
A process for printing a gold material on a substrate comprising printing the gold conductor composition of claim 5 on a substrate to a thickness of no more than about 6 microns.
Claim 14
Dependent Claim
31 words
A process for printing a gold material on a substrate comprising printing gold conductor composition of claim 6, on a substrate to a thickness of not more than about 6 microns.
Claim 15
Dependent Claim
32 words
A process for printing a gold material on a substrate comprising printing the gold conductor composition of claim 9, on a substrate to a thickness of no more than about 6 microns.
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) | 1991-12-27 | 1992-06-27 | 1992-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-27 | 1996-06-27 | 1996-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-27 | 2000-06-27 | 2000-12-27 | $7700.00 | Window Closed / Lapsed |