US4765929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silk-screenable circuit paste
Assignee: Osram Sylvania Inc
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Filing: 1986-08-29
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Granted: 1988-08-23
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Expires: 2006-08-29
Abstract
Abstract A silk-screenable circuit paste which can be screen-printed onto a circuit board with minimum pinholing or void formation is provided. The silk-screenable circuit paste of the present invention includes electrically conductive powder, a binding resin, an organic silicone material, and an organic solvent system including ethylene glycol diacetate and a suitable cosolvent.
Inventors
- 👤 John W. Shaffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:33
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K1/095; H01; H01B; H01B1/00; H01B1/20; H01B1/22; H01B1/24
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
45 words
A silk-screenable circuit paste composition comprising electrically conductive powder an acrylic binding resin, an organic silicone material in an amount from about 0.05 to about 5 weight percent of the circuit paste composition, and a solvent system comprising ethylene glycol diacetate and a suitable cosolvent.
Claim 2
Dependent Claim
45 words
A silk-screenable circuit paste composition comprising electrically conductive powder an acrylic binding resin, an organic silicone material in an amount from about 0.05 to about 5 weight percent of the circuit paste composition, and a solvent system comprising ethylene glycol diacetate and a suitable cosolvent.
Claim 3
Dependent Claim
39 words
A silk-screenable circuit paste composition in accordance with claim 1 wherein the solvent system comprises from about 10 to about 90 weight percent ethylene glycol diacetate and from about 10 to about 90 weight percent of a suitable cosolvent.
Claim 4
Dependent Claim
39 words
A silk-screenable circuit paste composition in accordance with claim 1 wherein the solvent system comprises from about 60 to about 90 weight percent ethylene glycol diacetate and from about 40 to about 90 weight percent of a suitable cosolvent.
Claim 5
Dependent Claim
64 words
A silk-screenable circuit paste composition comprising electrically conductive powder, an acrylic binding resin, an organic silicone material in an amount from about 0.05 to about 5 weight percent of the total circuit paste composition, and a solvent system comprising ethylene glycol diacetate and a suitable cosolvent, said solvent system comprising from about 30 to about 60 weight percent of the total circuit paste composition.
Claim 6
Dependent Claim
64 words
A silk-screenable circuit paste composition comprising electrically conductive powder, an acrylic binding resin, an organic silicone material in an amount from about 0.05 to about 5 weight percent of the total circuit paste composition, and a solvent system comprising ethylene glycol diacetate and a suitable cosolvent, said solvent system comprising from about 30 to about 60 weight percent of the total circuit paste composition.
Claim 7
Dependent Claim
39 words
A silk-screenable circuit paste composition in accordance with claim 4 wherein the solvent system comprises from about 10 to about 90 weight percent ethylene glycol diacetate and from about 10 to about 90 weight percent of a suitable cosolvent.
Claim 8
Dependent Claim
39 words
A silk-screenable circuit paste composition in accordance with claim 4 wherein the solvent system comprises from about 60 to about 90 weight percent ethylene glycol diacetate and from about 40 to about 90 weight percent of a suitable cosolvent.
Claim 9
Dependent Claim
36 words
A silk-screenable circuit paste composition in accordance with claim 4 wherein the organic silicone material is included in the circuit paste composition in the amount of about 0.5 weight percent of the total circuit paste composition.
Claim 10
Dependent Claim
35 words
A silk-screenable circuit paste composition in accordance with claim 7 wherein the solvent system is included in the circuit paste composition in the amount of about 45 weight percent of the total circuit paste composition.
Claim 11
Dependent Claim
39 words
A silk-screenable circuit paste composition in accordance with claim 8 wherein the solvent system comprises from about 10 to about 90 weight percent ethylene glycol diacetate and from about 10 to about 90 weight percent propylene glycol monomethyl ether.
Claim 12
Dependent Claim
39 words
A silk-screenable circuit paste composition in accordance with claim 8 wherein the solvent system comprises from about 10 to about 90 weight percent ethylene glycol diacetate and from about 10 to about 90 weight percent of a suitable cosolvent.
Claim 13
Dependent Claim
86 words
A silk-screenable circuit paste composition comprising electrically conductive powder, an acrylic binding resin, an organic silicone material in an amount from about 0.05 to about 5 weight percent of the total circuit paste composition, and a solvent system comprising ethylene glycol diacetate and a cosolvent, said solvent system comprising from about 30 to about 60 weight percent of the total circuit paste composition, and said cosolvent being selected from the group consisting of proplylene glycol monomethyl ether, butylacetate, cyclohexanone, diacetone alcohol, ethyl acetate, methyl-n-butylketone, and methyl-isobutylketone.
Claim 14
Dependent Claim
86 words
A silk-screenable circuit paste composition comprising electrically conductive powder, an acrylic binding resin, an organic silicone material in an amount from about 0.05 to about 5 weight percent of the total circuit paste composition, and a solvent system comprising ethylene glycol diacetate and a cosolvent, said solvent system comprising from about 30 to about 60 weight percent of the total circuit paste composition, and said cosolvent being selected from the group consisting of proplylene glycol monomethyl ether, butylacetate, cyclohexanone, diacetone alcohol, ethyl acetate, methyl-n-butylketone, and methyl-isobutylketone.
Claim 15
Dependent Claim
38 words
A silk-screenable circuit paste composition in accordance with claim 11 wherein the solvent system comprises from about 10 to about 90 weight percent ethylene glycol diacetate and from about 10 to about 90 weight percent of a cosolvent.
Claim 16
Dependent Claim
36 words
A silk-screenable circuit paste composition in accordance with claim 11 wherein the organic silicone material is included in the circuit paste composition in the amount of about 0.5 weight percent of the total circuit paste composition.
Claim 17
Dependent Claim
71 words
A silk-screenable circuit paste composition for forming a circuit pattern on a circuit board for a high-voltage photoflash array, said composition comprising: about 40 weight percent conductive nickel; from about 1 to about 5 weight percent conductive carbon black; greater than 10 to about 15 weight percent methyl methacrylate; about 11 weight percent propylene glycol monomethyl ether; about 33 weight percent ethylene glycol diacetate; and about 0.5 weight percent polydimethyl silicone.
Claim 18
Dependent Claim
71 words
A silk-screenable circuit paste composition for forming a circuit pattern on a circuit board for a high-voltage photoflash array, said composition comprising: about 40 weight percent conductive nickel; from about 1 to about 5 weight percent conductive carbon black; greater than 10 to about 15 weight percent methyl methacrylate; about 11 weight percent propylene glycol monomethyl ether; about 33 weight percent ethylene glycol diacetate; and about 0.5 weight percent polydimethyl silicone.
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) | 1991-08-23 | 1992-02-22 | 1992-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-23 | 1996-02-22 | 1996-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-23 | 2000-02-22 | 2000-08-23 | $7700.00 | Window Closed / Lapsed |