US3864159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacitor having thick-film glass-ceramic dielectric layer and method for manufacture
Assignee: OI Glass Inc
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Filing: 1972-12-04
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Granted: 1975-02-04
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Expires: 1992-12-04
Abstract
Abstract Disclosed is a capacitor having a thick-film, glass-ceramic, dielectric layer having a dielectric constant above about 90 at 5KHz, dielectric losses less than about 3% at 5KHz, wherein the dielectric layer is formed by heat treating at temperatures below about 1000*C., a thermally crystallizable glass frit consisting essentially of: INGREDIENTSMOLE %GeO220 - 36 Nb2O532 - 40 Na2O32 - 40 wherein the molar ratio of Na2O to Nb2O5 is from about 0.8:1 to about 1.2:1. Optionally specified proportions of B2O3 can be substituted for GeO2; and CdO and K2O can be substituted for Na2O.
Inventors
- 👤 Marshall Field
- 👤 James E Rapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:19
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/129
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
14 words
The method of claim 1 wherein said thermally crystallizable glass frit consists essentially of:
Claim 2
Dependent Claim
17 words
The method of claim 1 wherein said counterelectrode is applied on the fused and crystallized dielectric layer.
Claim 3
Dependent Claim
34 words
The method of claim 1 wherein the fusion and crystallization is carried out at a maximum temperature of about 750*C. to about 1,000*C. for a time period of about 5 to about 30 minutes.
Claim 4
Dependent Claim
16 words
The method of claim 4 wherein said time period is about 5 to about 15 minutes.
Claim 5
Dependent Claim
43 words
The method of claim 4 wherein a blend of particulate counterelectrode material in a binder is screen-stenciled onto the deposited mixture of said thermally crystallizable glass Frit and binder, and the counterelectrode is formed during the fusion and crystallization of said dielectric layer.
Claim 6
Dependent Claim
83 words
In a capacitor comprising at least one pair of electrodes which are separated by a glass-ceramic dielectric layer, the improvement wherein said glass-ceramic dielectric layer has dielectric constant in excess of about 90 at 5KHz and a dissipation factor of less than about 3% at 5KHz and a temperature coefficient of capacitance of + or - 15% over the range of -25*C. to +125*C., said glass-ceramic having been formed by the in situ thermal crystallization of a thermally crystallizable glass consisting essentially of:
Claim 7
Dependent Claim
14 words
The capacitor of claim 7 wherein said thermally crystallizable glass frit consists essentially of:
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |