US4401709A
Expired / Lapsed
US
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Overglaze inks
Assignee: Intersil Corp
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Filing: 1982-07-09
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Granted: 1983-08-30
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Expires: 2002-07-09
Abstract
Abstract Improved thick-film overglaze inks useful in constructing multilayer integrated circuits on circuit boards, particularly porcelain-coated metal circuit boards, are provided. The subject inks comprise: a glass consisting of lead oxide, a modifier component consisting of the oxides of cadmium, zinc, barium and antimony and a glass-forming component consisting of aluminum oxide, boron trioxide and silicon dioxide; a suitable organic vehicle and, if desired, a colorant oxide.
Inventors
- 👤 Ashok N. Prabhu
- 👤 Kenneth W. Hang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:56
CPC Classifications
C; C03; C03C; C03C1/00; C03C1/10; C03C8/00; C03C8/24; C03C8/245; H; H05; H05K; H05K3/00; H05K3/22; H05K3/28; H05K3/285; H05K2201/00; H05K2201/01; H05K2201/0137; H05K2201/017; H10; H10D; H10D86/00; H10D86/80; H10D86/85; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/24926
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
203 words
An electronic assembly comprising a circuit board having a multilayer integrated circuit thereon comprising a plurality of films, including conductor films and resistor films, a portion of said films having a coating of an overglaze ink comprising from about 60 to about 90 percent by weight of a glass powder and from about 8 to about 35 percent by weight of a suitable organic vehicle, said glass powder consisting essentially of: (a) from about 58 to about 66 percent by weight of lead oxide; (b) from about 12 to about 20 percent by weight of a modifier component consisting of from about 2 to about 6 percent by weight of cadmium oxide, from about 4 to about 8 percent by weight of zinc oxide, from about 0.1 to about 3 percent by weight of barium oxide and from about 0.1 to about 3 percent by weight of antimony trioxide; and (c) from about 20 to about 27 percent by weight of a glass-forming component consisting of from about 0.1 to about 2 percent by weight of aluminum oxide, from about 14 to about 20 percent by weight of boron trioxide and from about 1 to about 7 percent by weight of silicon dioxide.
Claim 2
Dependent Claim
203 words
An electronic assembly comprising a circuit board having a multilayer integrated circuit thereon comprising a plurality of films, including conductor films and resistor films, a portion of said films having a coating of an overglaze ink comprising from about 60 to about 90 percent by weight of a glass powder and from about 8 to about 35 percent by weight of a suitable organic vehicle, said glass powder consisting essentially of: (a) from about 58 to about 66 percent by weight of lead oxide; (b) from about 12 to about 20 percent by weight of a modifier component consisting of from about 2 to about 6 percent by weight of cadmium oxide, from about 4 to about 8 percent by weight of zinc oxide, from about 0.1 to about 3 percent by weight of barium oxide and from about 0.1 to about 3 percent by weight of antimony trioxide; and (c) from about 20 to about 27 percent by weight of a glass-forming component consisting of from about 0.1 to about 2 percent by weight of aluminum oxide, from about 14 to about 20 percent by weight of boron trioxide and from about 1 to about 7 percent by weight of silicon dioxide.
Claim 3
Dependent Claim
18 words
An electronic assembly in accordance with claim 1, wherein said circuit board is a porcelain-coated metal circuit board.
Claim 4
Dependent Claim
13 words
An electronic assembly in accordance with claim 2, wherein said metal is steel.
Claim 5
Dependent Claim
213 words
An electronic assembly comprising a circuit board having a multilayer integrated circuit thereon comprised of a plurality of films including conductor films and resistor films, a portion of said films having an overlayer of an overglaze film formed by applying and firing an overglaze ink comprising from about 60 to about 90 percent by weight of a glass powder and from about 8 to about 35 percent by weight of a suitable organic vehicle, said glass powder consisting essentially of: (a) from about 58 to about 66 percent by weight of lead oxide; (b) from about 12 to about 20 percent by weight of a modifier component consisting of from about 2 to about 6 percent by weight of cadmium oxide, from about 4 to about 8 percent by weight of zinc oxide, from about 0.1 to about 3 percent by weight of barium oxide and from about 0.1 to about 3 percent by weight of antimony trioxide; and (c) from about 20 to about 27 percent by weight of a glass forming component consisting of from about 0.1 to about 2 percent by weight of aluminum oxide, from about 14 to about 20 percent by weight of boron trioxide and from about 1 to about 7 percent by weight of silicon dioxide.
Claim 6
Dependent Claim
213 words
An electronic assembly comprising a circuit board having a multilayer integrated circuit thereon comprised of a plurality of films including conductor films and resistor films, a portion of said films having an overlayer of an overglaze film formed by applying and firing an overglaze ink comprising from about 60 to about 90 percent by weight of a glass powder and from about 8 to about 35 percent by weight of a suitable organic vehicle, said glass powder consisting essentially of: (a) from about 58 to about 66 percent by weight of lead oxide; (b) from about 12 to about 20 percent by weight of a modifier component consisting of from about 2 to about 6 percent by weight of cadmium oxide, from about 4 to about 8 percent by weight of zinc oxide, from about 0.1 to about 3 percent by weight of barium oxide and from about 0.1 to about 3 percent by weight of antimony trioxide; and (c) from about 20 to about 27 percent by weight of a glass forming component consisting of from about 0.1 to about 2 percent by weight of aluminum oxide, from about 14 to about 20 percent by weight of boron trioxide and from about 1 to about 7 percent by weight of silicon dioxide.
Claim 7
Dependent Claim
18 words
An electronic assembly in accordance with claim 4, wherein said circuit board is a porcelain-coated metal circuit board.
Claim 8
Dependent Claim
217 words
A process for forming a multilayer electrical circuit on a circuit board comprising: applying and firing on said board a plurality of inks including conductor inks and resistor inks to form films on said board; and applying and firing over a predetermined portion of said films an overglaze ink comprising from about 60 to about 90 percent by weight of a glass powder, and from about 8 to about 35 percent by weight of a suitable organic vehicle, said glass powder consisting essentially of: (a) from about 58 to about 66 percent by weight of lead oxide; (b) from about 12 to about 20 percent by weight of a modifier component consisting of from about 2 to about 6 percent by weight of cadmium oxide, from about 4 to about 8 percent by weight of zinc oxide, from about 0.1 to about 3 percent by weight of barium oxide and from about 0.1 to about 3 percent by weight of antimony trioxide; and (c) from about 20 to about 27 percent by weight of a glass forming component consisting of from about 0.1 to about 2 percent by weight of aluminum oxide, from about 14 to about 20 percent by weight of boron trioxide and from about 1 to about 7 percent by weight of silicon dioxide.
Claim 9
Dependent Claim
217 words
A process for forming a multilayer electrical circuit on a circuit board comprising: applying and firing on said board a plurality of inks including conductor inks and resistor inks to form films on said board; and applying and firing over a predetermined portion of said films an overglaze ink comprising from about 60 to about 90 percent by weight of a glass powder, and from about 8 to about 35 percent by weight of a suitable organic vehicle, said glass powder consisting essentially of: (a) from about 58 to about 66 percent by weight of lead oxide; (b) from about 12 to about 20 percent by weight of a modifier component consisting of from about 2 to about 6 percent by weight of cadmium oxide, from about 4 to about 8 percent by weight of zinc oxide, from about 0.1 to about 3 percent by weight of barium oxide and from about 0.1 to about 3 percent by weight of antimony trioxide; and (c) from about 20 to about 27 percent by weight of a glass forming component consisting of from about 0.1 to about 2 percent by weight of aluminum oxide, from about 14 to about 20 percent by weight of boron trioxide and from about 1 to about 7 percent by weight of silicon dioxide.
Claim 10
Dependent Claim
18 words
A process in accordance with claim 6, wherein said circuit board is a porcelain coated metal circuit board.
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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) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |