Patent US3785837A successfully refreshed from Google Patents.
US3785837A
Expired / Lapsed
US
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Partially crystallizable glasses for producing low-k crossover dielectrics
Assignee: EIDP Inc
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Filing: 1972-06-14
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Granted: 1974-01-15
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Expires: 1992-06-14
Abstract
Abstract Partially crystallizable glasses of BaO-ZnO-CaO-TiO2-Al2O3-SiO2 which upon firing form crossover dielectrics for use in printed circuits. The glasses are in finely divided form and are optionally dispersed in an inert liquid vehicle. The resultant partially crystallized crossover dielectrics consist essentially of 20-48 percent by weight crystals (celsian, sphene and zinc orthosilicate) dispersed in a glassy matrix and exhibit reduced dielectric constant (K).
Inventors
- 👤 R Amin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:59
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/46; H05K3/4685; C; C03; C03C; C03C10/00; C03C10/0036; C03C10/0045; C03C10/0054
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
25 words
A glass composition according to claim 1 dispersed in an inert liquid vehicle, there being 0.4-9 parts of glass per part of vehicle, by weight.
Claim 2
Dependent Claim
34 words
A glass composition according to claim 1 consisting essentially of, by weight, approximately, 30-33% SiO2 8-10% TiO2 10-12% Al2O3 12-26% BaO 10-26% ZnO 6-10% CaO 2- 8% B2O3 0- 2% MgO 0- 4% Bi2O3
Claim 3
Dependent Claim
25 words
A glass composition according to claim 3 dispersed in an inert liquid vehicle, there being 0.4-9 parts of glass per part of vehicle, by weight.
Claim 4
Dependent Claim
43 words
A glass composition according to claim 3, consisting essentially of, by weight, approximately 30% SiO2 8-10% TiO2 10% Al2O3 26% BaO 10-12% ZnO 6-10% CaO 4% B2O3 2% MgO the total weight of BaO and ZnO being 36-38 percent of the glass composition.
Claim 5
Dependent Claim
25 words
A glass composition according to claim 5 dispersed in an inert liquid vehicle, there being 0.4-9 parts of glass per part of vehicle, by weight.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |