US4609582A
Expired / Lapsed
US
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Dielectric glass in multilayer circuits and thick-film circuits comprising same
Assignee: US Philips Corp
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Filing: 1984-04-26
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Granted: 1986-09-02
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Expires: 2004-04-26
Abstract
Abstract A dielectric glass and a glass ceramic obtained therefrom is provided for separating crossing conductors in multilayer thick-film circuits. The dielectric glass has a composition in mol. % between the limits of 10-25% ZnO, 7.5-25% PbO, 50-60% SiO 2 , and 7.5-12.5% Al 2 O 3 . These compositions are particularly suitable for conductor patterns having silver because they are free from micropores.
Inventors
- 👤 Hendrik J. M. Joormann
- 👤 Alois J. M. Van Gorp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:34
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/46; C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/102; C03C3/105; C03C10/00; C03C10/0054; C03C3/062; C03C3/07; C03C4/00; C03C4/16; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K3/4644; H05K3/4673; H05K3/4676; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24802; Y10T428/24917; Y10T428/24926
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
103 words
A dielectric glass for separating crossing conductors in multilayer circuits, said glass having a composition consisting essentially of 10-25 mol.% ZnO, 7.5-25 mol.% PbO, 50-60 mol.% SiO 2 , and 7.5-12.5 mol.% Al 2 O 3 together with 0-5% by weight of at least one of cobalt oxide, nickel oxide, copper oxide, vanadium oxide, chromium oxide, and aluminates of said oxides, up to 40% by weight of ZrO 2 , zirconium aluminate, or zirconium silicate, and impurity amounts of less that 1 mol.%, wherein said composition contains 20-40% by weight of at least one of ZrO 2 , zirconium aluminate, and zirconium silicate.
Claim 2
Dependent Claim
103 words
A dielectric glass for separating crossing conductors in multilayer circuits, said glass having a composition consisting essentially of 10-25 mol.% ZnO, 7.5-25 mol.% PbO, 50-60 mol.% SiO 2 , and 7.5-12.5 mol.% Al 2 O 3 together with 0-5% by weight of at least one of cobalt oxide, nickel oxide, copper oxide, vanadium oxide, chromium oxide, and aluminates of said oxides, up to 40% by weight of ZrO 2 , zirconium aluminate, or zirconium silicate, and impurity amounts of less that 1 mol.%, wherein said composition contains 20-40% by weight of at least one of ZrO 2 , zirconium aluminate, and zirconium silicate.
Claim 3
Dependent Claim
30 words
A dielectric glass according to claim 1, wherein said composition has 15-20 mol.% ZnO, 10-15 mol.% PbO, 50-60 mol.% SiO 2 , and 7.5-12.5 mol.% Al 2 O 3 .
Claim 4
Dependent Claim
38 words
A dielectric glass according to claim 1, wherein at least one of cobalt oxide, nickel oxide, copper oxide, vanadium oxide, chromium oxide, and aluminates of said oxides are present in said composition to provide color to said composition.
Claim 5
Dependent Claim
117 words
A glass ceramic dielectric comprising a dielectric glass having a composition consisting essentially of 10-25 mol.% ZnO, 7.5-25 mol.% PbO, 50-60 mol.% SiO 2 , and 7.5-12.5 mol.% Al 2 O 3 together with 0-5% by weight of at least one of cobalt oxide, nickel oxide, copper oxide, vanadium oxide, chromium oxide, and aluminates of said oxides, upto 40% by weight of ZrO 2 , zirconium aluminate, or zirconium silicate, and impurity amounts of less than 1 mol.%; and a crystalline phase of said dielectric glass, said crystalline phase being in an amount between 10-20% by weight, wherein said composition contains 20-40% by weight of at least one of ZrO 2 , zirconium aluminate, and zirconium silicate.
Claim 6
Dependent Claim
117 words
A glass ceramic dielectric comprising a dielectric glass having a composition consisting essentially of 10-25 mol.% ZnO, 7.5-25 mol.% PbO, 50-60 mol.% SiO 2 , and 7.5-12.5 mol.% Al 2 O 3 together with 0-5% by weight of at least one of cobalt oxide, nickel oxide, copper oxide, vanadium oxide, chromium oxide, and aluminates of said oxides, upto 40% by weight of ZrO 2 , zirconium aluminate, or zirconium silicate, and impurity amounts of less than 1 mol.%; and a crystalline phase of said dielectric glass, said crystalline phase being in an amount between 10-20% by weight, wherein said composition contains 20-40% by weight of at least one of ZrO 2 , zirconium aluminate, and zirconium silicate.
Claim 7
Dependent Claim
31 words
A glass ceramic dielectric according to claim 4, wherein said composition has 15-20 mol.% ZnO, 10-15 mol.% PbO, 50-60 mol.% SiO 2 , and 7.5-12.5 mol.% Al 2 O 3 .
Claim 8
Dependent Claim
39 words
A glass ceramic dielectric according to claim 4, wherein at least one of cobalt oxide, nickel oxide, copper oxide, vanadium oxide, chromium oxide, and aluminates of said oxides are present in said composition to provide color to said composition.
Claim 9
Dependent Claim
151 words
A multilayer thick-film circuit comprising a surface layer; a layer having a conductor pattern on said surface layer; and a dielectric glass ceramic layer having apertures for electrical connections to separate crossing conductors of said conductor pattern, wherein said dielectric glass ceramic layer has a composition consisting essentially of 10-25 mol% ZnO, 7.5-25 mol.% PbO, 50-60 mol% SiO 2 , and 7.5-12.5 mol.% Al 2 O 3 together with 0-5% by weight of at least one of cobalt oxide, nickel oxide, copper oxide, vanadium oxide, chromium oxide, and aluminates of said oxides, upto 40% by weight of ZrO 2 , zirconium aluminate, or zirconium silicate, and impurity amounts of less than 1 mol.%, said ceramic layer having a crystalline phase of said dielectric glass in an amount between 10-20% by weight, wherein said composition contains 20-40% by weight of at least one of ZrO 2 , zirconium aluminate, and zirconium silicate.
Claim 10
Dependent Claim
151 words
A multilayer thick-film circuit comprising a surface layer; a layer having a conductor pattern on said surface layer; and a dielectric glass ceramic layer having apertures for electrical connections to separate crossing conductors of said conductor pattern, wherein said dielectric glass ceramic layer has a composition consisting essentially of 10-25 mol% ZnO, 7.5-25 mol.% PbO, 50-60 mol% SiO 2 , and 7.5-12.5 mol.% Al 2 O 3 together with 0-5% by weight of at least one of cobalt oxide, nickel oxide, copper oxide, vanadium oxide, chromium oxide, and aluminates of said oxides, upto 40% by weight of ZrO 2 , zirconium aluminate, or zirconium silicate, and impurity amounts of less than 1 mol.%, said ceramic layer having a crystalline phase of said dielectric glass in an amount between 10-20% by weight, wherein said composition contains 20-40% by weight of at least one of ZrO 2 , zirconium aluminate, and zirconium silicate.
Claim 11
Dependent Claim
31 words
A multilayer thick-film circuit according to claim 7, wherein said composition has 15-20 mol.% ZnO, 10-15 mol.% PbO, 50-60 mol.% SiO 2 , and 7.5-12.5 mol.% Al 2 O 3 .
Claim 12
Dependent Claim
39 words
A multilayer thick-film circuit according to claim 7, wherein at least one of cobalt oxide, nickel oxide, copper oxide, vanadium oxide, chromium oxide, and aluminates of said oxides are present in said composition to provide color to said composition.
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) | 1989-09-01 | 1990-03-03 | 1990-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-01 | 1994-03-03 | 1994-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-01 | 1998-03-03 | 1998-09-02 | $7700.00 | Window Closed / Lapsed |