DEVICE TO PROTECT AN ACTIVE IMPLANTABLE MEDICAL DEVICE FEEDTHROUGH CAPACITOR FROM STRAY LASER WELD STRIKES, AND RELATED MANUFACTURING PROCESS
First Claim
1. A process for manufacturing a feedthrough terminal assembly for an active implantable medical device, comprising the steps of:
- associating a feedthrough capacitor with a conductive ferrule, the feedthrough capacitor having first and second sets of electrode plates, wherein the second set of electrode plates is conductively coupled to the ferrule;
passing a terminal pin or leadwire through the ferrule in non-conductive relation and through the feedthrough capacitor in conductive relation with the first set of electrode plates;
placing an insulative shield over a surface of the feedthrough capacitor; and
conductively coupling electronic circuitry for the active implantable medical device to the terminal pin or leadwire, wherein the insulative shield protects the surface of the feedthrough capacitor from heat, splatter or debris occasioned by said coupling of the electronic circuitry to the terminal pin or leadwire.
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Accused Products
Abstract
An insulative shield is co-bonded to the top of a ceramic capacitor in a feedthrough terminal assembly on an active implantable medical device. The insulative shield is a thin substrate that provides protection against damage and degradation of the feedthrough capacitor and/or its conformal coating from heat, splatter or debris resulting from the electromechanical connection of components during construction of the assembly. Laser welding, thermal or ultrasonic bonding, soldering, brazing or related lead attachment techniques can create such heat, splatter or debris. In a preferred embodiment, the insulative shield is co-bonded using the capacitor'"'"'s own conformal coating.
119 Citations
44 Claims
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1. A process for manufacturing a feedthrough terminal assembly for an active implantable medical device, comprising the steps of:
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associating a feedthrough capacitor with a conductive ferrule, the feedthrough capacitor having first and second sets of electrode plates, wherein the second set of electrode plates is conductively coupled to the ferrule;
passing a terminal pin or leadwire through the ferrule in non-conductive relation and through the feedthrough capacitor in conductive relation with the first set of electrode plates;
placing an insulative shield over a surface of the feedthrough capacitor; and
conductively coupling electronic circuitry for the active implantable medical device to the terminal pin or leadwire, wherein the insulative shield protects the surface of the feedthrough capacitor from heat, splatter or debris occasioned by said coupling of the electronic circuitry to the terminal pin or leadwire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A process for manufacturing a feedthrough terminal assembly for an active implantable medical device, comprising the steps of:
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associating a feedthrough capacitor with a conductive ferrule, the feedthrough capacitor having first and second sets of electrode plates, wherein the second set of electrode plates is conductively coupled to the ferrule;
passing a terminal pin or leadwire through the ferrule in non-conductive relation and through the feedthrough capacitor in conductive relation with the first set of electrode plates;
placing an insulative shield over a surface of the feedthrough capacitor;
co-bonding the insulative shield to the feedthrough capacitor using a conformal coating on the feedthrough capacitor; and
laser welding, thermal or ultrasonic bonding, soldering, or brazing electronic circuitry for the active implantable medical device to the terminal pin or leadwire, wherein the insulative shield protects the surface of the feedthrough capacitor from heat, splatter or debris occasioned by said coupling of the electronic circuitry to the terminal pin or leadwire. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A feedthrough terminal assembly for an active implantable medical device, comprising:
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a feedthrough capacitor having first and second sets of electrode plates, wherein the second set of electrode plates is conductively coupled to a conductive ferrule;
a terminal pin or leadwire passing through the conductive ferrule in non-conductive relation and through the feedthrough capacitor in conductive relation with the first set of electrode plates;
an insulative shield on a surface of the feedthrough capacitor; and
electronic circuitry for the active implantable medical device conductively coupled to the terminal pin or leadwire, wherein the insulative shield protects the surface of the feedthrough capacitor from heat, splatter or debris occasioned by said coupling of the electronic circuitry to the terminal pin or leadwire. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A feedthrough terminal assembly for an active implantable medical device, comprising:
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a feedthrough capacitor having first and second sets of electrode plates, wherein the second set of electrode plates is conductively coupled to a conductive ferrule;
a terminal pin or leadwire passing through the conductive ferrule in non-conductive relation and through the feedthrough capacitor in conductive relation with the first set of electrode plates;
an insulative shield on a surface of the feedthrough capacitor;
a conformal coating on the feedthrough capacitor, wherein the conformal coating co-bonds the insulative shield to the feedthrough capacitor; and
electronic circuitry for the active implantable medical device conductively coupled to the terminal pin or leadwire by laser welding, thermal or ultrasonic bonding, soldering, or brazing, wherein the insulative shield protects the surface of the feedthrough capacitor from heat, splatter or debris occasioned by said coupling of the electronic circuitry to the terminal pin or leadwire. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44)
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Specification