US3784887A
Expired / Lapsed
US
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Process for making capacitors and capacitors made thereby
Assignee: EIDP Inc
•
Filing: 1973-04-26
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Granted: 1974-01-08
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Expires: 1993-04-26
Abstract
Abstract An improved process for making multilayer monolithic capacitors, using metallizations which can be cofired with reactive dielectric materials at elevated temperatures. The metallizations contain critical proportionate amounts of Pt and/or Au and Pd, and optionally Ag. Also the resultant capacitors.
Inventors
- 👤 J Sheard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:41
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/005; H01G4/008; H01G4/0085; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
28 words
A process according to claim 1 where the noble metal additionally comprises up to 40 percent by weight of silver, based on the total weight of noble metal.
Claim 2
Dependent Claim
49 words
A process according to claim 1 wherein the noble metal powder is (a) platinum, gold or a mixture thereof and (b) palladium, the weight ratio of (a)/(b) being at least 1.85/1; there being at least 15 percent by weight palladium, based on the total weight of noble metal present.
Claim 3
Dependent Claim
27 words
A process according to claim 3 wherein the noble metal additionally comprises up to 30 percent by weight silver, based on the total weight of noble metal.
Claim 4
Dependent Claim
87 words
A ceramic capacitor having at least one electrode and at least one counterelectrode separated by a layer of ceramic, characterized in that at least one of the electrode and counterelectrode consists essentially of a mixture of noble metal powders or a noble metal alloy powder or a mixture thereOf, of (a) platinum, gold or a mixture thereof and (b) palladium; the weight ratio of (a)/(b) being at least 1/1; there being at least 15 percent by weight palladium, based on the total weight of noble metal present.
Claim 5
Dependent Claim
41 words
A ceramic capacitor according to claim 5 wherein at least one of the electrode and counterelectrode consists essentially of a noble metal powder additionally comprising up to 40 percent by weight of silver, based on the total weight of noble metal.
Claim 6
Dependent Claim
75 words
A ceramic capacitor according to claim 5 characterized in that at least one of the electrode and counterelectrode consists essentially of a mixture of noble metal powders or a noble metal alloy powder or a mixture thereof of (a) platinum, gold or a mixture thereof and (b) palladium, the weight ratio of (a)/(b) being at least 1.85/1; there being at least 15 percent by weight palladium, based on the total weight of noble metal present.
Claim 7
Dependent Claim
41 words
A ceramic capacitor according to claim 7 wherein at least one of the electrode and counterelectrode consists essentially of a noble metal powder additionally comprising up to 30 percent by weight of silver, based on the total weight of noble metal.
References Cited (Backward Citations)
GB693455A
Cited
US3619744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |