Apparatus to improve the high voltage flashover characteristics of EMI feedthrough filters used in active implantable medical devices
First Claim
Patent Images
1. A feedthrough terminal assembly for an active implantable medical device, comprising:
- a conductive terminal pin or leadwire;
a feedthrough filter capacitor having an outboard body fluid side, an inboard side, a first set of electrode plates conductively coupled to the terminal pin or leadwire, and a second set of electrode plates conductively coupled to a housing, ferrule or ground plane of the active implantable medical device; and
a non-conductive mullion bonded to said inboard side of said feedthrough filter capacitor and relative to the terminal pin or leadwire for increasing creepage distance between the terminal pin or leadwire and another conductive element, creating a tortuous path that increases resistance to arcing/flashover.
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Abstract
A feedthrough terminal assembly for an active implantable medical device includes a conductive terminal pin or leadwire, a feedthrough filter capacitor having a first set of electrode plates conductively coupled to the terminal pin or leadwire, and a second set of electrode plates conductively coupled to a housing, ferrule or ground plane of the active implantable medical device, and a non-conductive mullion disposed relative to the terminal pin or leadwire for increasing creepage distance between the terminal pin or leadwire and another conductive element, creating a tortuous path that increases resistance to arcing/flashover.
50 Citations
21 Claims
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1. A feedthrough terminal assembly for an active implantable medical device, comprising:
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a conductive terminal pin or leadwire; a feedthrough filter capacitor having an outboard body fluid side, an inboard side, a first set of electrode plates conductively coupled to the terminal pin or leadwire, and a second set of electrode plates conductively coupled to a housing, ferrule or ground plane of the active implantable medical device; and a non-conductive mullion bonded to said inboard side of said feedthrough filter capacitor and relative to the terminal pin or leadwire for increasing creepage distance between the terminal pin or leadwire and another conductive element, creating a tortuous path that increases resistance to arcing/flashover. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 21)
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9. A feedthrough terminal assembly for an active implantable medical device, comprising:
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a first conductive terminal pin or leadwire; a feedthrough filter capacitor having an outboard body fluid side, an inboard side, a first set of electrode plates conductively coupled to the first terminal pin or leadwire, and a second set of electrode plates conductively coupled to a housing, ferrule or ground plane of the active implantable medical device; and a non-conductive mullion bonded to said inboard side of the capacitor and relative to the terminal pin or leadwire for increasing creepage distance between the first terminal pin or leadwire and a second conductive terminal pin or leadwire extending through the feedthrough filter capacitor wherein at least a portion of the mullion is disposed between the conductive terminal pins or leadwires, creating a tortuous path that increases resistance to arcing/flash over. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A feedthrough terminal assembly for an active implantable medical device, comprising:
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a conductive terminal pin or leadwire; a feedthrough filter capacitor having an outboard body fluid side, an inboard side, a first set of electrode plates conductively coupled to the terminal pin or leadwire, and a second set of electrode plates conductively coupled to a housing, ferrule or ground plane of the active implantable medical device;
a non-conductive mullion adhesively bonded to said inboard side of the capacitor and relative to the terminal pin or leadwire for increasing creepage distance between the terminal pin or leadwire and another conductive element, creating a tortuous path that increases resistance to arcing/flashover; andwherein the active implantable medical device comprises a cardiac pacemaker, an implantable defibrillator, a congestive heart failure device, a hearing implant, a neurostimulator, a drug pump, a ventricular assist device, an insulin pump, a spinal cord stimulator, an implantable sensing system, an artificial heart, an incontinence device, a bone growth stimulator, a gastric pacemaker or a prosthetic device. - View Dependent Claims (17, 18, 19, 20)
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Specification