Internally grounded feedthrough filter capacitor
DC CAFCFirst Claim
1. A feedthrough filter capacitor assembly, comprising:
- at least one conductive terminal pin;
a conductive ferrule through which the terminal pin passes in non-conductive relation;
a feedthrough filter capacitor having first and second sets of electrode plates and a first passageway through which the terminal pin extends in conductive relation with the first set of electrode plates; and
a ground lead conductively coupled to the conductive ferrule, and extending into a second passageway through the feedthrough filter capacitor in conductive relation with the second set of electrode plates.
16 Assignments
Litigations
1 Petition
Reexamination
Accused Products
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.
-
Citations
29 Claims
-
1. A feedthrough filter capacitor assembly, comprising:
-
at least one conductive terminal pin; a conductive ferrule through which the terminal pin passes in non-conductive relation; a feedthrough filter capacitor having first and second sets of electrode plates and a first passageway through which the terminal pin extends in conductive relation with the first set of electrode plates; and a ground lead conductively coupled to the conductive ferrule, and extending into a second passageway through the feedthrough filter capacitor in conductive relation with the second set of electrode plates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A feedthrough filter capacitor assembly utilized in connection with a conductive substrate, comprising:
-
at least one conductive terminal pin; means for mounting the terminal pin for passage through an opening formed in the conductive substrate with the terminal pin and the substrate in non-conductive relation; a feed-through filter capacitor having first and second sets of electrode plates, a first passageway through which the terminal pin extends in conductive relation with the first set of electrode plates, and a second passageway; and a ground lead conductively coupled to the conductive substrate, and extending into the second passageway in conductive relation with the second set of electrode plates. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
-
-
25. A feedthrough filter capacitor assembly utilized in connection with a conductive substrate, comprising:
-
at least one conductive terminal pin; means for mounting the terminal pin for passage through an opening formed in the conductive substrate with the terminal pin and the substrate in non-conductive relation; a feed-through filter capacitor having first and second sets of electrode plates, a first passageway through which the terminal pin extends in conductive relation with the first set of electrode plates, and a second passageway, wherein the feedthrough filter capacitor includes non-metallized exterior surfaces; a ground lead conductively coupled to the conductive substrate, and extending into the second passageway in conductive relation with the second set of electrode plates; and means for hermetically sealing passage of the terminal pin through the terminal pin mounting means. - View Dependent Claims (26, 27, 28, 29)
-
Specification