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US5531003A
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Fabricating a combination feedthrough/capacitor including a metallized tantalum or niobium pin
Assignee: Medtronic Inc
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Filing: 1994-12-13
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Granted: 1996-07-02
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Expires: 2014-12-13
Abstract
Abstract Tantalum or niobium feedthrough conductor pins are provided with a thin, vacuum deposited metal coating to control oxidation growth during feedthrough fabrication. The coated feedthrough pins are incorporated into a feedthrough which includes a capacitive structure in electrical contact with the coated pin.
Inventors
- 👤 Lynn M. Seifried
- 👤 Susan A. Tettemer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:05
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/35; H01B; H01B17/00; H01B17/26; H01B17/28; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
61 words
A method of fabricating a combination feedthrough/capacitor comprising the steps: metallizing a tantalum or niobium pin with a vacuum deposited thin film coating selected from the group consisting of gold, platinum, palladium and titanium; inserting the pin through a metal ferrule and supporting it therein with a brazed ceramic body, and contacting the pin with a capacitive structure within the ferrule.
Claim 2
Independent Claim
61 words
A method of fabricating a combination feedthrough/capacitor comprising the steps: metallizing a tantalum or niobium pin with a vacuum deposited thin film coating selected from the group consisting of gold, platinum, palladium and titanium; inserting the pin through a metal ferrule and supporting it therein with a brazed ceramic body, and contacting the pin with a capacitive structure within the ferrule.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the metallization is accomplished by sputtering.
Claim 4
Dependent Claim
11 words
The method of claim 1 wherein the entire pin is coated.
Claim 5
Dependent Claim
18 words
The method of claim 1 wherein only that portion of the pin contacting the capacitive structure is coated.
Claim 6
Dependent Claim
22 words
The method of claim 1 in which the protective metal is selected from the group consisting of gold, platinum, palladium and titanium.
Claim 7
Independent Claim
73 words
A method of fabricating a combination feedthrough/capacitor comprising the steps: inserting a tantalum or niobium pin through a metal ferrule and positioning same therein with a brazed ceramic insulator body; metallizing at least that portion of the pin to be contacted by a capacitive structure with a thin film, vacuum deposited protective metal coating selected to protect the pin from oxidation growth, and contacting the pin with a capacitive structure within the ferrule.
Claim 8
Independent Claim
73 words
A method of fabricating a combination feedthrough/capacitor comprising the steps: inserting a tantalum or niobium pin through a metal ferrule and positioning same therein with a brazed ceramic insulator body; metallizing at least that portion of the pin to be contacted by a capacitive structure with a thin film, vacuum deposited protective metal coating selected to protect the pin from oxidation growth, and contacting the pin with a capacitive structure within the ferrule.
Claim 9
Dependent Claim
14 words
The method of claim 6 wherein the metal coating is sputtered onto the pin.
Claim 10
Dependent Claim
22 words
The method of claim 6 in which the protective metal is selected from the group consisting of gold, platinum, palladium and titanium.
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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) | 1999-07-02 | 2000-01-01 | 2000-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-02 | 2004-01-01 | 2004-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-02 | 2008-01-01 | 2008-07-02 | $7700.00 | Window Closed / Lapsed |