US4369254A
Expired / Lapsed
US
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Crossover dielectric inks
Assignee: Intersil Corp
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Filing: 1981-07-06
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Granted: 1983-01-18
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Expires: 2001-07-06
Abstract
Abstract Novel thick-film crossover dielectric inks useful in constructing multilayer circuits on suitable substrates are provided. The subject inks comprise a barium magnesium borosilicate glass powder, a pinhole reducing component comprising silicon dioxide, an alkaline earth aluminum borosilicate glass having a high softening point or mixtures thereof and a suitable organic vehicle.
Inventors
- 👤 Ashok N. Prabhu
- 👤 Kenneth W. Hang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:09
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/46; C; C03; C03C; C03C8/00; C03C8/24; H05K3/4685; 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; Y10T428/25; Y10T428/252; Y10T428/258
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
95 words
A crossover dielectric ink suitable for forming an intermediary film between two or more conductor films on a substrate comprising: (a) from about 30 to about 70 percent by weight of a partially devitrifying barium magnesium borosilicate glass powder; (b) from about 10 to about 30 percent by weight of a pinhole reducing component selected from the group consisting of silicon dioxide, an alkaline earth aluminum borosilicate glass having a softening point above about 700° C., and mixtures thereof; and (c) from about 20 to about 50 percent by weight of a suitable organic vehicle.
Claim 2
Dependent Claim
95 words
A crossover dielectric ink suitable for forming an intermediary film between two or more conductor films on a substrate comprising: (a) from about 30 to about 70 percent by weight of a partially devitrifying barium magnesium borosilicate glass powder; (b) from about 10 to about 30 percent by weight of a pinhole reducing component selected from the group consisting of silicon dioxide, an alkaline earth aluminum borosilicate glass having a softening point above about 700° C., and mixtures thereof; and (c) from about 20 to about 50 percent by weight of a suitable organic vehicle.
Claim 3
Dependent Claim
111 words
A crossover dielectric ink in accordance with claim 1, wherein said partially devitrifying glass consists essentially of: (a) from about 17 to about 49 percent by weight of barium oxide; (b) from about 16 to about 43 percent by weight of magnesium oxide; (c) from about 13 to about 33 percent by weight of boron trioxide; (d) from about 8 to about 22 percent by weight of silicon dioxide; (e) from 0 to about 12 percent by weight of lanthanum trioxide; and (f) from 0 to about 6 percent by weight of a mixture of phosphorus pentoxide and zirconium oxide in a weight ratio of from about 1:2 to about 1:7.
Claim 4
Dependent Claim
31 words
A crossover dielectric ink in accordance with claim 2, wherein said glass contains from about 3 to about 4 percent by weight of said mixture of phosphorus pentoxide and zirconium oxide.
Claim 5
Dependent Claim
23 words
A crossover dielectric ink in accordance with claim 1, wherein said alkaline earth aluminum borosilicate glass is a barium calcium aluminum borosilicate glass.
Claim 6
Dependent Claim
85 words
A crossover dielectric ink in accordance with claim 4, wherein said barium calcium aluminum borosilicate glass consists essentially of: (a) from about 45 to about 55 percent by weight of barium oxide; (b) from about 6 to about 15 percent by weight of calcium oxide; (c) from about 10 to about 20 percent by weight of boron trioxide; (d) from about 6 to about 13 percent by weight of aluminum oxide; and (e) from about 5 to about 15 percent by weight of silicon dioxide.
Claim 7
Dependent Claim
32 words
A crossover dielectric ink in accordance with any of claims 1, 4 and 5, wherein said pinhole reducing component is a mixture of silicon dioxide and said alkaline earth aluminum borosilicate glass.
Claim 8
Dependent Claim
37 words
A crossover dielectric ink in accordance with claim 1, wherein said ink contains up to about 5 percent by weight of a colorant oxide selected from the group consisting of chromium oxide, cobalt oxide and nickel oxide.
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) | 1986-01-17 | 1986-07-19 | 1987-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-17 | 1990-07-19 | 1991-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-17 | 1994-07-19 | 1995-01-18 | $7700.00 | Window Closed / Lapsed |