Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1997-09-10
1999-05-18
Kincaid, Kristine
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
361303, 3613061, 361309, H01G4/35
Patent
active
059056274
ABSTRACT:
An internally grounded ceramic feedthrough filter capacitor assembly provides for the shielding and decoupling of a conductive terminal pin or lead of the type used, for example, in an implantable medical device such as a cardiac pacemaker or cardioverter defibrillator against passage of external interference signals, such as those caused by digital cellular phones. The assembly includes a terminal pin subassembly having at least one terminal pin supported within a conductive ferrule by a hermetically sealed insulator structure. The ferrule is adapted for mounting onto a conductive substrate, such as a pacemaker housing, by welding or brazing to support the terminal pin subassembly for feedthrough passage to the housing interior. A ceramic feedthrough capacitor is mounted at an inboard side, with the capacitor electrode plate sets coupled respectively to a grounded lead and to the terminal pins(s) by conductive adhesive, soldering, brazing or the like. In preferred forms of the invention, multiple feedthrough filter capacitors are provided in a substantially coplanar array within a common base structure, with each capacitor in association with a respective terminal pin.
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Brendel Richard L.
Stevenson Robert A.
Dinkins Anthony
Kincaid Kristine
Maxwell Energy Products, Inc.
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