US4820661A
Expired / Lapsed
US
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Glass ceramic dielectric compositions
Assignee: EIDP Inc
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Filing: 1988-06-03
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Granted: 1989-04-11
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Expires: 2008-06-03
Abstract
Abstract The invention is directed to thick film crossover dielectric compositions in which the dielectric is an amorphous aluminoborosilicate glass which upon firing forms a single phase of celsian in a matrix of amorphous remainder glass.
Inventors
- 👤 Kumaran M. Nair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:19
CPC Classifications
C; C03; C03C; C03C10/00; C03C10/0036; C03C10/0045; H; H01; H01B; H01B3/00; H01B3/02; H01B3/08; H01B3/087; H01B3/088; H01B3/12; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K3/00; H05K3/46; H05K3/4685
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
66 words
An amorphous aluminoborosilicate glass frit which is crystallizable at thick film processing conditions to form a single phase of celsian in a matrix of remainder glass the amorphous glass consisting essentially by weight of 30% SiO 2 , 8% TiO 2 , ZrO 2 or mixtures thereof, 10% Al 2 O 3 , 10% BaO, 10% ZnO, 24% CaO and 8% B 2 O 3 .
Claim 2
Dependent Claim
66 words
An amorphous aluminoborosilicate glass frit which is crystallizable at thick film processing conditions to form a single phase of celsian in a matrix of remainder glass the amorphous glass consisting essentially by weight of 30% SiO 2 , 8% TiO 2 , ZrO 2 or mixtures thereof, 10% Al 2 O 3 , 10% BaO, 10% ZnO, 24% CaO and 8% B 2 O 3 .
Claim 3
Dependent Claim
83 words
A printable thick film dielectric composition consisting essentially of (a) finely divided particles of an amorphous aluminoborosilicate glass which is crystallizable at Thick Film Processing Conditions to form a single phase of celsian in a matrix of remainder glass dispersed in (b) organic medium, the glass consisting essentially by weight of 30%, SiO 2 , 8% TiO 2 , ZrO 2 or mixtures thereof, 10% Al 2 O 3 , 10% BaO, 10% ZnO, 24% CaO and 8% B 2 O 3 .
Claim 4
Dependent Claim
83 words
A printable thick film dielectric composition consisting essentially of (a) finely divided particles of an amorphous aluminoborosilicate glass which is crystallizable at Thick Film Processing Conditions to form a single phase of celsian in a matrix of remainder glass dispersed in (b) organic medium, the glass consisting essentially by weight of 30%, SiO 2 , 8% TiO 2 , ZrO 2 or mixtures thereof, 10% Al 2 O 3 , 10% BaO, 10% ZnO, 24% CaO and 8% B 2 O 3 .
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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) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |