US4399320A
Expired / Lapsed
US
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Conductor inks
Assignee: Intersil Corp
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Filing: 1982-07-09
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Granted: 1983-08-16
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Expires: 2002-07-09
Abstract
Abstract Improved conductor inks useful in constructing multilayer circuits, particularly on porcelain-coated metal substrates, are provided. The subject inks comprise: copper powder, a barium calcium borosilicate glass frit, a suitable organic vehicle and bismuth oxide, which is present either in admixture with the copper powder or as a component of the glass frit.
Inventors
- 👤 Ashok N. Prabhu
- 👤 Kenneth W. Hang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:06
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; C; C03; C03C; C03C8/00; C03C8/02; C03C8/14; C03C8/18; H01; H01B; H01B1/00; H01B1/14; H01B1/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
96 words
A circuit board having on a portion of the surface thereof a coating of a conductor ink comprising: (a) from about 70 to about 90 percent by weight of copper powder; (b) from about 1 to about 15 percent by weight of a barium calcium borosilicate glass frit; (c) from about 0.5 to about 3 percent by weight of bismuth oxide, wherein bismuth oxide is present in admixture with the copper powder or as a component of the glass frit; and (d) from about 6 to about 25 percent by weight of a suitable organic vehicle.
Claim 2
Dependent Claim
96 words
A circuit board having on a portion of the surface thereof a coating of a conductor ink comprising: (a) from about 70 to about 90 percent by weight of copper powder; (b) from about 1 to about 15 percent by weight of a barium calcium borosilicate glass frit; (c) from about 0.5 to about 3 percent by weight of bismuth oxide, wherein bismuth oxide is present in admixture with the copper powder or as a component of the glass frit; and (d) from about 6 to about 25 percent by weight of a suitable organic vehicle.
Claim 3
Dependent Claim
14 words
A circuit board in accordance with claim 1, wherein said board is porcelain-coated metal.
Claim 4
Dependent Claim
106 words
A process for forming a conductor film as part of a circuit on a suitable circuit board comprising applying and firing onto said board an ink composition comprising: (a) from about 70 to about 90 percent by weight of copper powder; (b) from about 1 to about 15 percent by weight of a barium calcium borosilicate glass frit; (c) from about 0.5 to about 3 percent by weight of bismuth oxide, wherein bismuth oxide is present in admixture with the copper powder or as a component of the glass frit; and (d) from about 6 to about 25 percent by weight of a suitable organic vehicle.
Claim 5
Dependent Claim
106 words
A process for forming a conductor film as part of a circuit on a suitable circuit board comprising applying and firing onto said board an ink composition comprising: (a) from about 70 to about 90 percent by weight of copper powder; (b) from about 1 to about 15 percent by weight of a barium calcium borosilicate glass frit; (c) from about 0.5 to about 3 percent by weight of bismuth oxide, wherein bismuth oxide is present in admixture with the copper powder or as a component of the glass frit; and (d) from about 6 to about 25 percent by weight of a suitable organic vehicle.
Claim 6
Dependent Claim
104 words
An electronic assembly comprising a circuit board having a circuit thereon, said circuit containing a conductor film formed by applying and firing a conductor ink comprising: (a) from about 70 to about 90 percent by weight of copper powder; (b) from about 1 to about 15 percent by weight of a barium calcium borosilicate glass frit; (c) from about 0.5 to about 3 percent by weight of bismuth oxide, wherein bismuth oxide is present in admixture with the copper powder or as a component of the glass frit; and (d) from about 6 to about 25 percent by weight of a suitable organic vehicle.
Claim 7
Dependent Claim
104 words
An electronic assembly comprising a circuit board having a circuit thereon, said circuit containing a conductor film formed by applying and firing a conductor ink comprising: (a) from about 70 to about 90 percent by weight of copper powder; (b) from about 1 to about 15 percent by weight of a barium calcium borosilicate glass frit; (c) from about 0.5 to about 3 percent by weight of bismuth oxide, wherein bismuth oxide is present in admixture with the copper powder or as a component of the glass frit; and (d) from about 6 to about 25 percent by weight of a suitable organic vehicle.
Claim 8
Dependent Claim
18 words
An electronic assembly in accordance with claim 4, wherein said circuit board is a procelain-coated metal circuit board.
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) | 1986-08-15 | 1987-02-14 | 1987-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-15 | 1991-02-14 | 1991-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-15 | 1995-02-14 | 1995-08-16 | $7700.00 | Window Closed / Lapsed |