US4323652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starting mixture for a dielectric composition, screen printing paste having such a starting mixture, and product obtained
Assignee: US Philips Corp
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Filing: 1980-03-14
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Granted: 1982-04-06
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Expires: 2000-03-14
Abstract
Abstract Dielectric composition, screen printing paste having such a composition and products obtained. The invention describes a dielectric composition which may be used in particular as an insulating screen-printing paste, which is compatible with a copper-containing conductive screen-printed layer, the paste containing, dispersed in an organic vehicle, a mixture of ceramic phases, consisting essentially of zinc oxide and cobalt oxide, and a vitreous phase containing at least a glass which can be devitrified by dissolving the zinc oxide.
Inventors
- 👤 Hugues Baudry
- 👤 Claude Morhaim
- 👤 Dominique Bricout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:38
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/03; C03; C03C; C03C14/00; C03C14/004; C03C3/00; C03C3/04; C03C3/076; C03C3/078; C03C3/089; C03C3/091; C03C3/093; H; H01; H01B; H01B3/00; H01B3/02; H01B3/08; H01B3/087; H01B3/12; C03C2214/00; C03C2214/04; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K3/00; H05K3/46; H05K3/4644; H05K3/4664; H05K3/4667; H10; H10D; H10D86/00; H10D86/80; H10D86/85
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
87 words
A composition suitable for forming a dielectric composition consisting essentially of 85 to 60% by volume of a vitreous phase and 15 to 40% by volume of a ceramic phase, said ceramic phase consisting essentially of zinc oxide or of a mixture of zinc oxide and cobalt oxide and said vitreous phase having the following composition by mol percent: 30-50% SiO 2 , 20-40% ZnO, 0-20% B 2 O 3 , 0-10% Al 2 O 3 , 5-40% CaO+SrO+BaO and, as a coloring oxide, 0-10% of CoO.
Claim 2
Dependent Claim
87 words
A composition suitable for forming a dielectric composition consisting essentially of 85 to 60% by volume of a vitreous phase and 15 to 40% by volume of a ceramic phase, said ceramic phase consisting essentially of zinc oxide or of a mixture of zinc oxide and cobalt oxide and said vitreous phase having the following composition by mol percent: 30-50% SiO 2 , 20-40% ZnO, 0-20% B 2 O 3 , 0-10% Al 2 O 3 , 5-40% CaO+SrO+BaO and, as a coloring oxide, 0-10% of CoO.
Claim 3
Dependent Claim
40 words
The composition of claim 1, characterized in that the vitreous phase in molar quantities is composed of 50% SiO 2 , 20% ZnO, 5% B 2 O 3 , 5% Al 2 O 3 , 15% BaO and 5% CoO.
Claim 4
Dependent Claim
26 words
The composition of claim 1 characterized in that the vitreous phase consists of a mixture of glasses at least one glass of which is spontaneously devitrifiable.
Claim 5
Dependent Claim
28 words
The composition of claim 3 characterized in that the spontaneously devitrifiable glass containing the following compositions in mol percent: 48% SiO 2 , 29% ZnO and 23% CaO.
Claim 6
Dependent Claim
30 words
The composition of any of claims 2 and 1-4 characterized in that it consists of 22% by volume of the ceramic phase and 78% by volume of the vitreous phase.
Claim 7
Dependent Claim
18 words
The composition of claims 1 or 4, characterized in that cobalt oxide is present in the ceramic phase.
References Cited (Backward Citations)
US4152282A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-05 | 1985-10-05 | 1986-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-05 | 1989-10-05 | 1990-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-05 | 1993-10-05 | 1994-04-06 | $7700.00 | Window Closed / Lapsed |