Abstract: A lead pin fixture is used to align and hold lead pins in place for brazing lead pins to metal contact pads of a ceramic insulator and brazing a ferrule to the ceramic insulator in a single step.

Abstract: A lead pin fixture is used to align and hold lead pins in place for brazing lead pins to metal contact pads of a ceramic insulator and brazing a ferrule to the ceramic insulator in a single step.

Abstract: A determination of an equivalent series resistance (ESR) effect for high frequency filtering performance of a filtered feed-through assembly is described. A low frequency signal is introduced to a filtered feed-through assembly. ESR limit of the filtered feed-through is determined based on the low frequency signal.

Abstract: A filtered feedthrough assembly having at least one terminal pin therethrough is provided. The feedthrough assembly comprises a ferrule having a cavity therethrough for receiving the terminal pin, and insulating structure having an upper surface. The insulating structure is disposed within the cavity and around the terminal pin for electrically isolating the pin from the ferrule. A capacitor is disposed around the pin and electrically coupled thereto. The capacitor has a lower surface that is disposed proximate the upper surface, and at least one washer is disposed between the upper surface and the lower surface. To attach the capacitor to the insulating structure, a body of epoxy is substantially confined between the upper surface and the lower surface by the ferrule, the insulating structure, the capacitor, and the at least one washer.

Abstract: A determination of an equivalent series resistance (ESR) effect for high frequency filtering performance of a filtered feed-through assembly is described. A low frequency signal is introduced to a filtered feed-through assembly. ESR limit of the filtered feed-through is determined based on the low frequency signal.

Abstract: A method for coupling a capacitor to a feedthrough assembly that includes a ferrule and a terminal pin therethrough is provided. The method comprises dispensing an epoxy onto an outer surface of the feedthrough assembly. A capacitor, which has an opening therethrough for receiving the terminal pin and cooperates therewith to form a cavity, is placed over the ferrule to contact the epoxy. A weight is placed on the capacitor to position it with respect to the terminal pin, and the epoxy is cured.

Abstract: A determination of an equivalent series resistance (ESR) effect for high frequency filtering performance of a filtered feed-through assembly is described. A low frequency signal is introduced to a filtered feed-through assembly. ESR limit of the filtered feed-through is determined based on the low frequency signal.

Abstract: A determination of an equivalent series resistance (ESR) effect for high frequency filtering performance of a filtered feed-through assembly is described. A low frequency signal is introduced to a filtered feed-through assembly. ESR limit of the filtered feed-through is determined based on the low frequency signal.

Abstract: A method for attaching a capacitor to the feedthrough assembly of a medical device is provided. The capacitor includes a lower surface, and the feedthrough assembly includes a ferrule having a cavity therethrough for receiving at least one terminal pin. The feedthrough assembly is configured to be coupled to the medical device, and the cavity is configured to receive therein an insulating structure having an upper surface. The method comprises threading a first washer over the terminal pin, and placing a body of epoxy in contact with the first washer. The capacitor is positioned over the terminal pin such that the first washer and the body of epoxy are between the lower surface of the capacitor and the upper surface of the insulating structure. The body of epoxy is cured to couple the capacitor to the insulating structure. During curing, the body of epoxy is substantially confined between the upper surface and the lower surface by the ferrule, the insulating structure, the capacitor, and the first washer.

Abstract: A method for coupling a capacitor to a feedthrough assembly that includes a ferrule and a terminal pin therethrough is provided. The method comprises dispensing an epoxy onto an outer surface of the feedthrough assembly. A capacitor, which has an opening therethrough for receiving the terminal pin and cooperates therewith to form a cavity, is placed over the ferrule to contact the epoxy. A weight is placed on the capacitor to position it with respect to the terminal pin, and the epoxy is cured.

Abstract: A method for attaching a capacitor to the feedthrough assembly of a medical device having a terminal pin comprises threading a first washer over the terminal pin, and placing a body of epoxy in contact with the first washer. The capacitor is positioned over the terminal pin such that the first washer and the body of epoxy are between the lower surface of the capacitor and a support surface. The body of epoxy is cured to couple the capacitor to the insulating structure. During curing, the body of epoxy is substantially confined between the upper surface and the lower surface by the ferrule, the insulating structure, the capacitor, and the first washer.

Abstract: A method for attaching a capacitor to the feedthrough assembly of a medical device having a terminal pin comprises threading a first washer over the terminal pin, and placing a body of epoxy in contact with the first washer. The capacitor is positioned over the terminal pin such that the first washer and the body of epoxy are between the lower surface of the capacitor and a support surface. The body of epoxy is cured to couple the capacitor to the insulating structure. During curing, the body of epoxy is substantially confined between the upper surface and the lower surface by the ferrule, the insulating structure, the capacitor, and the first washer.

Abstract: A determination of an equivalent series resistance (ESR) effect for high frequency filtering performance of a filtered feed-through assembly is described. A low frequency signal is introduced to a filtered feed-through assembly. ESR limit of the filtered feed-through is determined based on the low frequency signal.

Abstract: A determination of an equivalent series resistance (ESR) effect for high frequency filtering performance of a filtered feed-through assembly is described. A low frequency signal is introduced to a filtered feed-through assembly. ESR limit of the filtered feed-through is determined based on the low frequency signal.

Abstract: An optical window assembly for use in implantable medical devices includes a generally U-shaped ferrule having a strain relief channel to accommodate residual stresses remaining in the ferrule after welding the ferrule to the housing of an implantable medical device. The assembly may be used to transmit optical energy and/or electrically insulate a feedthrough. The assembly can be mounted in a window opening in a housing. The ferrule can include a ferrule body forming a lens opening, the ferrule body having a generally U-shaped cross-section with an inner leg, an outer leg, and a strain relief channel in the ferrule body between the inner leg and the outer leg. A lens is mounted in the lens opening of the ferrule. The ferrule can also include a lens flange on the inner leg of the ferrule body, a support flange on the outer leg of the ferrule body, and/or a braze stop to control flow of the braze. The ferrule and housing can be constructed of titanium.

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.

Abstract: Tantalum 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.