NOVEL CAPACITIVE ELEMENTS AND FILTERED FEEDTHROUGH ELEMENTS FOR IMPLANTABLE MEDICAL DEVICES
First Claim
Patent Images
1. A method for forming a filtered feedthrough element for an implantable device, the method comprising:
- providing a feedthrough subassembly that comprises a ferrule, an insulator, an and a pin wherein the insulator being coupled to the ferrule and the pin;
placing a capacitive element inside the ferrule such that the feedthrough pin slides through an inner diameter of the capacitive element;
introducing conductive material between the pin and the inner diameter of the capacitive element;
introducing conductive material between the outer diameter of the capacitive element and the ferrule, wherein the capacitive element includes at least one recessed area at the outer diameter of the capacitive element to form a subassembly; and
applying heat to the subassembly.
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Abstract
A capacitive element for an implantable medical device feedthrough element includes a bore, to receive a feedthrough member, or pin of the filtered feedthrough element, an external surface extending laterally outward from a first opening of the bore, and a recessed area formed in the external surface and extending about an outer perimeter thereof. The recessed area may provide a location on which to apply a conductive material to form a joint that electrically couples the capacitive element to a ferrule of the filtered feedthrough element.
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Citations
22 Claims
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1. A method for forming a filtered feedthrough element for an implantable device, the method comprising:
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providing a feedthrough subassembly that comprises a ferrule, an insulator, an and a pin wherein the insulator being coupled to the ferrule and the pin; placing a capacitive element inside the ferrule such that the feedthrough pin slides through an inner diameter of the capacitive element; introducing conductive material between the pin and the inner diameter of the capacitive element; introducing conductive material between the outer diameter of the capacitive element and the ferrule, wherein the capacitive element includes at least one recessed area at the outer diameter of the capacitive element to form a subassembly; and applying heat to the subassembly. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for forming a filtered feedthrough element for an implantable device, the method comprising:
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providing a feedthrough subassembly that comprises a ferrule, an insulator, an and a pin wherein the insulator being coupled to the ferrule and the pin; placing a capacitive element inside the ferrule such that the feedthrough pin slides through an inner diameter of the capacitive element; introducing a first solder perform over the feedthrough pin; introducing a second solder perform in a gap between an outer diameter of the capacitive element and the ferrule, the capacitive element includes at least one recessed areas at the outer diameter of the capacitive element to form a subassembly; and applying heat to the subassembly assembly. - View Dependent Claims (9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 20)
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14. A method for manufacturing a filtered feedthrough element for an implantable device, the method comprising:
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sealing an insulator element to a feedthrough member and to a ferrule, the insulator element extending around the member and within the ferrule; inserting a capacitive element into the ferrule and around the member such that the member extends into a bore of the capacitive element; and coupling the capacitive element to the ferrule by applying a conductive material onto a recessed area of a first external surface of the capacitive element, the first external surface extending laterally outward from a first opening of the bore, and the recessed area extending about a perimeter of the first external surface and being adjacent to the ferrule.
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21. A method for manufacturing a filtered feedthrough assembly for an implantable medical device, the method comprising:
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inserting a feedthrough pin into a bore of a capacitive element, the bore being an approximate line-to-line fit about the pin; abutting a surface of the capacitive element directly against a shelf within a ferrule through which the pin extends, the shelf being spaced apart from an insulator element, the insulator element extending around the pin and within the ferrule, and being sealed to the pin and the ferrule; and coupling the capacitive element to the pin and to the ferrule; wherein the surface of the capacitive element extends outward from an opening of the bore and faces toward the insulator element. - View Dependent Claims (22)
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Specification