Inductor capacitor EMI filter for human implant applications

US 6,999,818 B2
Filed: 04/15/2004
Issued: 02/14/2006
Est. Priority Date: 05/23/2003
Status: Expired due to Fees

First Claim

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1. A feedthrough terminal assembly for an active implantable medical device, comprising:

a conductive ferrule conductively coupled to a housing of the active implantable medical device;

a feedthrough capacitor having first and second sets of electrode plates, the second set of electrode plates being conductively coupled to the ferrule;

an inductor having a surface bonded to an adjacent surface of the capacitor with a non-conductive material; and

a conductive terminal pin extending through the capacitor and the inductor, the terminal pin extending through the inductor in non-conductive relation and conductively coupled to the first set of electrode plates.

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Abstract

A feedthrough terminal assembly for an active implantable medical device includes a conductive ferrule conductively coupled to a housing of the medical device, a feedthrough capacitor conductively coupled to the ferrule, an inductor closely associated with the capacitor in non-conductive relation, and a conductive terminal pin extending through the capacitor and the inductor. The terminal pin extends through the inductor in non-conductive relation and is conductively coupled to active electrode plates of the capacitor. In one preferred form, the terminal pin is wound about the inductor. Additionally, the inductor may be maintained in close association with the capacitor without forming a direct physical attachment therebetween.

Citations

252 Claims

1. A feedthrough terminal assembly for an active implantable medical device, comprising:
- a conductive ferrule conductively coupled to a housing of the active implantable medical device;
  
  a feedthrough capacitor having first and second sets of electrode plates, the second set of electrode plates being conductively coupled to the ferrule;
  
  an inductor having a surface bonded to an adjacent surface of the capacitor with a non-conductive material; and
  
  a conductive terminal pin extending through the capacitor and the inductor, the terminal pin extending through the inductor in non-conductive relation and conductively coupled to the first set of electrode plates.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
- - 2. The assembly of claim 1, wherein the active implantable medical device comprises a cardiac pacemaker, an implantable defibrillator, a cochlear implant, a neurostimulator, a drug pump, a ventricular assist device, an implantable sensing system, a gastric pacemaker or a prosthetic device.
  - 3. The assembly of claim 1, wherein the capacitor and the inductor are housed within the ferrule.
  - 4. The assembly of claim 3, including an insulative cap disposed over the inductor opposite the capacitor.
  - 5. The assembly of claim 1, wherein the capacitor is disposed on a body fluid side of the feedthrough terminal assembly.
  - 6. The assembly of claim 1, wherein the feedthrough capacitor comprises first and second feedthrough capacitors associated with the inductor in non-conductive relation.
  - 7. The assembly of claim 6, wherein the first and second feedthrough capacitors are disposed adjacent to opposing surfaces of the inductor.
  - 8. The assembly of claim 7, wherein the capacitors are bonded to the inductor.
  - 9. The assembly of claim 7, wherein each capacitor is internally grounded.
  - 10. The assembly of claim 6, wherein the first and second capacitors each include a first set of electrode plates conductively coupled to the terminal pin, and a second set of electrode plates conductively coupled to the ferrule.
  - 11. The assembly of claim 10, wherein the first capacitor comprises an externally grounded capacitor, and the second capacitor comprises an internally grounded capacitor, the feedthrough terminal assembly further including a conductive material extending through both the first and second feedthrough capacitors to conductively couple the second set of electrode plates of the second capacitor with the second set of electrode plates of the first capacitor.
  - 12. The assembly of claim 11, wherein the first and second feedthrough capacitors are disposed adjacent to opposing surfaces of the inductor.
  - 13. The assembly of claim 11, wherein the conductive material comprises a thermal setting conductive adhesive, a solder, or a solder paste.
  - 14. The assembly of claim 11, wherein the conductive material comprises a conductive pin.
  - 15. The assembly of claim 14, wherein the conductive pin comprises a nail head pin.
  - 16. The assembly of claim 14, wherein the conductive pin comprises a pin attached to an underlying hermetic insulator.
  - 17. The assembly of claim 1, including an hermetic insulator disposed between the terminal pin and the ferrule, wherein the capacitor is disposed adjacent to the hermetic insulator.
  - 18. The assembly of claim 17, wherein the inductor and the capacitor each include an aperture through which a leak detection gas can be detected.
  - 19. The assembly of claim 1, wherein the terminal pin is wound about the inductor to form multiple turns.
  - 20. The assembly of claim 19, wherein adjacent portions of the wound terminal pin are electrically insulated from one another.
  - 21. The assembly of claim 20, wherein the adjacent portions of the wound terminal pin are encased in a non-conductive material.
  - 22. The assembly of claim 21, wherein the adjacent portions of the wound terminal pin are encased within a non-conductive sleeve.
  - 23. The assembly of claim 19, wherein the inductor includes a notch for receiving the wound terminal pin.
  - 24. The assembly of claim 23, including a ramp formed in the notch.
  - 25. The assembly of claim 23, wherein the inductor includes multiple notches therein.
  - 26. The assembly of claim 25, wherein each notch accommodates a separate terminal pin therein.
  - 27. The assembly of claim 23, wherein the notch includes multiple slots for receiving corresponding multiple turns of the terminal pin.
  - 28. The assembly of claim 23, wherein the notch comprises contoured corners for accommodating the terminal pin.
  - 29. The assembly of claim 1, including a plurality of distinct feedthrough capacitors each having a respective terminal pin extending therethrough, wherein the inductor is non-conductively associated with each of the plurality of feedthrough capacitors.
  - 30. The assembly of claim 1, including means for maintaining the inductor in close association with the capacitor without forming a direct physical attachment therebetween.
  - 31. The assembly of claim 30, wherein the maintaining means comprises a lock associated with the terminal pin.
  - 32. The assembly of claim 31, wherein the lock comprises a mechanical lock.
  - 33. The assembly of claim 31, wherein the lock comprises a deformation in the terminal pin.
  - 34. The assembly of claim 31, wherein the lock comprises a cured polymer.
  - 35. The assembly of claim 30, wherein the maintaining means comprises a wire bond pad attached to the terminal pin.
  - 36. The assembly of claim 35, including a non-conductive substrate disposed between the wire bond pad and the inductor.
  - 37. The assembly of claim 1, wherein the non-conductive material comprises a washer.
  - 38. The assembly of claim 37, wherein the washer comprises a thin film, adhesive-backed washer.
  - 39. The assembly of claim 1, wherein the non-conductive material comprises polyimide.

40. A feedthrough terminal assembly for an active implantable medical device, comprising:
- a conductive ferrule conductively coupled to a housing of the active implantable medical device;
  
  a feedthrough capacitor having first and second sets of electrode plates, the second set of electrode plates being conductively coupled to the ferrule;
  
  an inductor closely associated with the capacitor in non-conductive relation; and
  
  a conductive terminal pin extending through the capacitor and the inductor, the terminal pin extending through the inductor in non-conductive relation and conductively coupled to the first set of electrode plates;
  
  wherein the inductor comprises a high permeability ferrite material.
- View Dependent Claims (41)
- - 41. The assembly of claim 40, wherein the inductor comprises a material selected from cobalt zinc ferrite, nickel zinc ferrite, manganese zinc ferrite, powdered iron, or molypermalloy.

42. A feedthrough terminal assembly for an active implantable medical device, comprising:
- a conductive ferrule conductively coupled to a housing of the active implantable medical device;
  
  a feedthrough capacitor having first and second sets of electrode plates, the second set of electrode plates being conductively coupled to the ferrule;
  
  an inductor closely associated with the capacitor in non-conductive relation;
  
  a conductive terminal pin extending through the capacitor and the inductor, the terminal pin extending through the inductor in non-conductive relation and conductively coupled to the first set of electrode plates; and
  
  a conformal coating over the inductor.
- View Dependent Claims (43, 44)
- - 43. The assembly of claim 42, wherein the conformal coating comprises Paralyne.
  - 44. The assembly of claim 43, wherein the conformal coating comprises Paralyne C, D, E, or N.

45. A feedthrough terminal assembly for an active implantable medical device, comprising:
- a conductive ferrule conductively coupled to a housing of the active implantable medical device;
  
  a feedthrough capacitor having first and second sets of electrode plates, the second set of electrode plates being conductively coupled to the ferrule;
  
  an inductor closely associated with the capacitor in non-conductive relation;
  
  a conductive terminal pin extending through the capacitor and the inductor, the terminal pin extending through the inductor in non-conductive relation and conductively coupled to the first set of electrode plates; and
  
  an insulator disposed between the inductor and the terminal pin.
- View Dependent Claims (46, 47)
- - 46. The assembly of claim 45, wherein the insulator comprises a non-conductive polymer.
  - 47. The assembly of claim 46, wherein the non-conductive polymer comprises an epoxy, a thermal-setting non-conductive adhesive, a non-conductive polyimide, or a silicone material.

48. A feedthrough terminal assembly for an active implantable medical device, comprising:
- a conductive ferrule conductively coupled to a housing of the active implantable medical device;
  
  a feedthrough capacitor having first and second sets of electrode plates, the second set of electrode plates being conductively coupled to the ferrule;
  
  an inductor closely associated with the capacitor in non-conductive relation;
  
  a conductive terminal pin extending through the capacitor and the inductor, the terminal pin extending through the inductor in non-conductive relation and conductively coupled to the first set of electrode plates; and
  
  a second inductor through which the terminal pin extends in non-conductive relation.
- View Dependent Claims (49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
- - 49. The assembly of claim 48, wherein the inductors are disposed adjacent to one another.
  - 50. The assembly of claim 49, comprising at least one additional inductor stacked onto another one of the inductors.
  - 51. The assembly of claim 49, wherein the inductors are each comprised of materials having different physical or electrical properties.
  - 52. The assembly of claim 49, wherein the inductors are each comprised of materials having the same physical or electrical properties.
  - 53. The assembly of claim 48, wherein the inductors are disposed on opposite sides of the capacitor.
  - 54. The assembly of claim 53, wherein at least one of the inductors is disposed on a body fluid side of the feedthrough terminal assembly.
  - 55. The assembly of claim 53, wherein the second inductor is disposed adjacent to the ferrule.
  - 56. The assembly of claim 53, wherein the inductors are disposed adjacent to opposing surfaces of the capacitor.
  - 57. The assembly of claim 56, wherein the inductors are bonded to the capacitor.
  - 58. The assembly of claim 56, wherein the capacitor and the inductors are disposed within and conductively isolated from the ferrule.

59. A feedthrough terminal assembly for an active implantable medical device, comprising:
- a conductive ferrule conductively coupled to a housing of the active implantable medical device;
  
  a feedthrough capacitor having first and second sets of electrode plates, the second set of electrode plates being conductively coupled to the ferrule;
  
  an inductor closely associated with the capacitor in non-conductive relation; and
  
  a conductive terminal pin extending through the capacitor and the inductor, the terminal pin extending through the inductor in non-conductive relation and conductively coupled to the first set of electrode plates;
  
  wherein the capacitor'"'"'s second set of electrode plates are externally grounded to the ferrule.

60. A feedthrough terminal assembly for an active implantable medical device, comprising:
- a conductive ferrule conductively coupled to a housing of the active implantable medical device;
  
  a feedthrough capacitor having first and second sets of electrode plates, the second set of electrode plates being conductively coupled to the ferrule;
  
  an inductor closely associated with the capacitor in non-conductive relation; and
  
  a conductive terminal pin extending through the capacitor and the inductor, the terminal pin extending through the inductor in non-conductive relation and conductively coupled to the first set of electrode plates;
  
  wherein the capacitor'"'"'s second set of electrode plates are internally grounded to the ferrule.

61. A feedthrough terminal assembly for an active implantable medical device, comprising:
- a conductive ferrule conductively coupled to a housing of the active implantable medical device;
  
  a feedthrough capacitor having first and second sets of electrode plates, the second set of electrode plates being conductively coupled to the ferrule;
  
  a first inductor bonded to the capacitor in non-conductive relation;
  
  a second inductor bonded to the capacitor in non-conductive relation, the second inductor being disposed opposite the first conductor relative to the capacitor; and
  
  a conductive terminal pin extending through the capacitor and the inductors, the terminal pin extending through the inductors in non-conductive relation and conductively coupled to the first set of electrode plates.
- View Dependent Claims (62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100)
- - 62. The assembly of claim 61, wherein the active implantable medical device comprises a cardiac pacemaker, an implantable defibrillator, a cochlear implant, a neurostimulator, a drug pump, a ventricular assist device, an implantable sensing system, a gastric pacemaker or a prosthetic device.
  - 63. The assembly of claim 61, wherein the inductors comprise a high permeability ferrite material.
  - 64. The assembly of claim 63, wherein the inductors comprise a material selected from cobalt zinc ferrite, nickel zinc ferrite, manganese zinc ferrite, powdered iron, or molypermalloy.
  - 65. The assembly of claim 61, including a conformal coating over the inductors.
  - 66. The assembly of claim 65, wherein the conformal coating comprises Paralyne.
  - 67. The assembly of claim 61, including insulators disposed between the inductors and the terminal pin.
  - 68. The assembly of claim 67, wherein the insulators comprise a non-conductive polymer.
  - 69. The assembly of claim 61, including a third inductor through which the terminal pin extends in non-conductive relation.
  - 70. The assembly of claim 69, wherein the first and third inductors are disposed adjacent to one another.
  - 71. The assembly of claim 70, comprising at least one additional inductor stacked onto the third inductor.
  - 72. The assembly of claim 61, wherein the inductors are each comprised of materials having different physical or electrical properties.
  - 73. The assembly of claim 61, wherein the inductors are each comprised of materials having the same physical or electrical properties.
  - 74. The assembly of claim 61, wherein the capacitor and the inductors are housed within the ferrule.
  - 75. The assembly of claim 74, including an insulative cap disposed over one of the inductors opposite the capacitor.
  - 76. The assembly of claim 61, wherein at least one of the inductors is disposed on a body fluid side of the feedthrough terminal assembly.
  - 77. The assembly of claim 61, wherein the second inductor is disposed adjacent to the ferrule.
  - 78. The assembly of claim 61, wherein the inductors are disposed adjacent to opposing surfaces of the capacitor.
  - 79. The assembly of claim 78, wherein the capacitor and the inductors are disposed within and conductively isolated from the ferrule.
  - 80. The assembly of claim 61, wherein the capacitor is disposed on a body fluid side of the feedthrough terminal assembly.
  - 81. The assembly of claim 61, including an hermetic insulator disposed between the terminal pin and the ferrule, wherein the capacitor is disposed adjacent to the hermetic insulator.
  - 82. The assembly of claim 61, wherein the capacitor'"'"'s second set of electrode plates are externally grounded to the ferrule.
  - 83. The assembly of claim 61, wherein the capacitor'"'"'s second set of electrode plates are internally grounded to the ferrule.
  - 84. The assembly of claim 61, wherein the terminal pin is wound about at least one of the inductors to form multiple turns.
  - 85. The assembly of claim 84, wherein adjacent portions of the wound terminal pin are electrically insulated from one another.
  - 86. The assembly of claim 85, wherein the adjacent portions of the wound terminal pin are encased in a non-conductive material.
  - 87. The assembly of claim 86, wherein the adjacent portions of the wound terminal pin are encased within a non-conductive sleeve.
  - 88. The assembly of claim 84, wherein at least one of the inductors includes a notch for receiving the wound terminal pin.
  - 89. The assembly of claim 88, including a ramp formed in the notch.
  - 90. The assembly of claim 88, wherein the inductor includes multiple notches therein.
  - 91. The assembly of claim 90, wherein each notch accommodates a separate terminal pin therein.
  - 92. The assembly of claim 88, wherein the notch includes multiple slots for receiving corresponding multiple turns of the terminal pin.
  - 93. The assembly of claim 88, wherein the notch comprises contoured corners for accommodating the terminal pin.
  - 94. The assembly of claim 61, including means for maintaining at least one of the inductors in close association with the capacitor without forming a direct physical attachment therebetween.
  - 95. The assembly of claim 94, wherein the maintaining means comprises a lock associated with the terminal pin.
  - 96. The assembly of claim 95, wherein the lock comprises a mechanical lock.
  - 97. The assembly of claim 95, wherein the lock comprises a deformation in the terminal pin.
  - 98. The assembly of claim 95, wherein the lock comprises a cured polymer.
  - 99. The assembly of claim 94, wherein the maintaining means comprises a wire bond pad attached to the terminal pin.
  - 100. The assembly of claim 61, wherein the inductor is bonded to the capacitor with a non-conductive washer.

101. A feedthrough terminal assembly for an active implantable medical device, comprising:
- a conductive ferrule conductively coupled to a housing of the active implantable medical device;
  
  a first feedthrough capacitor having first and second sets of electrode plates, the second set of electrode plates being conductively coupled to the ferrule;
  
  a second feedthough capacitor having first and second sets of electrode plates, the second set of electrode plates being conductively coupled to the ferrule;
  
  an inductor disposed between and bonded to the capacitors in non-conductive relation; and
  
  a conductive terminal pin extending throught the capacitors and the inductor, the terminal pin extending through the inductor in non-conductive relation and conductively coupled to the first sets of electrode plates of both capacitors.
- View Dependent Claims (102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143)
- - 102. The assembly of claim 101, wherein the active implantable medical device comprises a cardiac pacemaker, an implantable defibrillator, a cochlear implant, a neurostimulator, a drug pump, a ventricular assist device, an implantable sensing system, a gastric pacemaker or a prosthetic device.
  - 103. The assembly of claim 101, wherein the inductor is bonded to the capacitors utilizing a non-conductive polyimide, glass, Paralyne, a ceramic bonding material, epoxy, silicone, or a thermal plastic supportive tape adhesive.
  - 104. The assembly of claim 101, wherein the inductor comprises a high permeability ferrite material.
  - 105. The assembly of claim 104, wherein the inductor comprises a material selected from cobalt zinc ferrite, nickel zinc ferrite, manganese zinc ferrite, powdered iron, or molypermalloy.
  - 106. The assembly of claim 101, including a conformal coating over the inductor.
  - 107. The assembly of claim 106, wherein the conformal coating comprises Paralyne C, D, E, or N.
  - 108. The assembly of claim 101, including an insulator disposed between the inductor and the terminal pin.
  - 109. The assembly of claim 108, wherein the insulator comprises a non-conductive polymer.
  - 110. The assembly of claim 109, wherein the non-conductive polymer comprises an epoxy, a thermal-setting non-conductive adhesive, a non-conductive polyimide, or a silicone material.
  - 111. The assembly of claim 101, wherein at least one of the capacitors and the inductor are housed within the ferrule.
  - 112. The assembly of claim 101, wherein at least one of the capacitors is disposed on a body fluid side of the feedthrough terminal assembly.
  - 113. The assembly of claim 101, wherein the first and second feedthrough capacitors are disposed adjacent to opposing surfaces of the inductor.
  - 114. The assembly of claim 113, wherein the capacitors are bonded to the inductor.
  - 115. The assembly of claim 113, wherein each capacitor is internally grounded.
  - 116. The assembly of claim 101, wherein the first and second capacitors each include a first set of electrode plates conductively coupled to the terminal pin, and a second set of electrode plates conductively coupled to the ferrule.
  - 117. The assembly of claim 116, wherein the first capacitor comprises an externally grounded capacitor, and the second capacitor comprises an internally grounded capacitor, the feedthrough terminal assembly further including a conductive material extending through both the first and second feedthrough capacitors to conductively couple the second set of electrode plates of the second capacitor with the second set of electrode plates of the first capacitor.
  - 118. The assembly of claim 117, wherein the first and second feedthrough capacitors are disposed adjacent to opposing surfaces of the inductor.
  - 119. The assembly of claim 117, wherein the conductive material comprises a thermal setting conductive adhesive, a solder, or a solder paste.
  - 120. The assembly of claim 117, wherein the conductive material comprises a conductive pin.
  - 121. The assembly of claim 120, wherein the conductive pin comprises a nail head pin.
  - 122. The assembly of claim 120, wherein the conductive pin comprises a pin attached to an underlying hermetic insulator.
  - 123. The assembly of claim 101, including an hermetic insulator disposed between the terminal pin and the ferrule, wherein at least one of the capacitors is disposed adjacent to the hermetic insulator.
  - 124. The assembly of claim 123, wherein at least one of the inductors and the capacitors each include an aperture through which a leak detection gas can be detected.
  - 125. The assembly of claim 101, wherein at least one of the capacitors'"'"' second set of electrode plates are externally grounded to the ferrule.
  - 126. The assembly of claim 101, wherein at least one of the capacitors'"'"' second set of electrode plates are internally grounded to the ferrule.
  - 127. The assembly of claim 101, wherein the terminal pin is wound about the inductor to form multiple turns.
  - 128. The assembly of claim 127, wherein adjacent portions of the wound terminal pin are electrically insulated from one another.
  - 129. The assembly of claim 128, wherein the adjacent portions of the wound terminal pin are encased in a non-conductive material.
  - 130. The assembly of claim 129, wherein the adjacent portions of the wound terminal pin are encased within a non-conductive sleeve.
  - 131. The assembly of claim 127, wherein the inductor includes a notch for receiving the wound terminal pin.
  - 132. The assembly of claim 130, including a ramp formed in the notch.
  - 133. The assembly of claim 130, wherein the inductor includes multiple notches therein.
  - 134. The assembly of claim 133, wherein each notch accommodates a separate terminal pin therein.
  - 135. The assembly of claim 131, wherein the notch includes multiple slots for receiving corresponding multiple turns of the terminal pin.
  - 136. The assembly of claim 131, wherein the notch comprises contoured corners for accommodating the terminal pin.
  - 137. The assembly of claim 101, including means for maintaining the inductor in close association with at least one of the capacitors without forming a direct physical attachment therebetween.
  - 138. The assembly of claim 137, wherein the maintaining means comprises a lock associated with the terminal pin.
  - 139. The assembly of claim 138, wherein the lock comprises a mechanical lock.
  - 140. The assembly of claim 138, wherein the lock comprises a deformation in the terminal pin.
  - 141. The assembly of claim 138, wherein the lock comprises a cured polymer.
  - 142. The assembly of claim 137, wherein the maintaining means comprises a wire bond pad attached to the terminal pin.
  - 143. The assembly of claim 101, wherein the capacitors are bonded to the inductor with non-conductive washers.

144. A feedthrough terminal assembly for an active implantable medical device, comprising;
- a conductive ferrule conductively coupled to a housing of the active implantable medical device;
  
  an externally grounded feedthrough capacitor having first and second sets of electrode plates, the second set of electrode plates being conductively coupled to the ferrule;
  
  an internally grounded feedthrough capacitor having first and second sets of electrode plates, the second set of electrode plates of the internally grounded capacitor being conductively coupled to the second set of electrode plates of the first capacitor;
  
  an inductor disposed between and closely associated with the capacitors in non-conductive relation; and
  
  a conductive terminal pin extending through the capacitors and the inductor, the terminal pin extending through the inductor in non-conductive relation and conductively coupled to the first sets of electrode plates of both capacitors.
- View Dependent Claims (145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172)
- - 145. The assembly of claim 144, wherein the active implantable medical device comprises a cardiac pacemaker, an implantable defibrillator, a cochlear implant, a neurostimulator, a drug pump, a ventricular assist device, an implantable sensing system, a gastric pacemaker or a prosthetic device.
  - 146. The assembly of claim 144, wherein the inductor comprises a high permeability ferrite material.
  - 147. The assembly of claim 146, wherein the inductor comprises a material selected from cobalt zinc ferrite, nickel zinc ferrite, manganese zinc ferrite, powdered iron, or molypermalloy.
  - 148. The assembly of claim 144, including a conformal coating over the inductor.
  - 149. The assembly of claim 148, wherein the conformal coating comprises Paralyne.
  - 150. The assembly of claim 149, wherein the conformal coating comprises Paralyne C, D, E, or N.
  - 151. The assembly of claim 144, including a conductive material extending through both the first and second feedthrough capacitors to conductively couple the second set of electrode plates of the second capacitor with the second set of electrode plates of the first capacitor.
  - 152. The assembly of claim 151, wherein the capacitors are disposed adjacent to opposing surfaces of the inductor.
  - 153. The assembly of claim 151, wherein the conductive material comprises a thermal setting conductive adhesive, a solder, or a solder paste.
  - 154. The assembly of claim 151, wherein the conductive material comprises a conductive pin.
  - 155. The assembly of claim 154, wherein the conductive pin comprises a nail head pin.
  - 156. The assembly of claim 154, wherein the conductive pin comprises a pin attached to an underlying hermetic insulator.
  - 157. The assembly of claim 144, wherein the terminal pin is wound about the inductor to form multiple turns.
  - 158. The assembly of claim 157, wherein adjacent portions of the wound terminal pin are electrically insulated from one another.
  - 159. The assembly of claim 158, wherein the adjacent portions of the wound terminal pin are encased in a non-conductive material.
  - 160. The assembly of claim 159, wherein the adjacent portions of the wound terminal pin are encased within a non-conductive sleeve.
  - 161. The assembly of claim 157, wherein the inductor includes a notch for receiving the wound terminal pin.
  - 162. The assembly of claim 161, including a ramp formed in the notch.
  - 163. The assembly of claim 161, wherein the inductor includes multiple notches therein.
  - 164. The assembly of claim 163, wherein each notch accommodates a separate terminal pin therein.
  - 165. The assembly of claim 161, wherein the notch includes multiple slots for receiving corresponding multiple turns of the terminal pin.
  - 166. The assembly of claim 161, wherein the notch comprises contoured corners for accommodating the terminal pin.
  - 167. The assembly of claim 144, including means for maintaining the inductor in close association with at least one of the capacitors without forming a direct physical attachment therebetween.
  - 168. The assembly of claim 167, wherein the maintaining means comprises a lock associated with the terminal pin.
  - 169. The assembly of claim 168, wherein the lock comprises a mechanical lock.
  - 170. The assembly of claim 168, wherein the lock comprises a deformation in the terminal pin.
  - 171. The assembly of claim 168, wherein the lock comprises a cured polymer.
  - 172. The assembly of claim 167, wherein the maintaining means comprises a wire bond pad attached to the terminal pin.

173. A feedthrough terminal assembly for an active implantable medical device, comprising:
- a conductive ferrule conductively coupled to a housing of the active implantable medical device;
  
  a feedthrough capacitor having first and second sets of electrode plates, the second set of electrode plates being conductively coupled to the ferrule, wherein the capacitor'"'"'s second set of electrodes are externally grounded to the ferrule;
  
  an inductor associated with the capacitor in non-conductive relation;
  
  means for maintaining the inductor in close association with the capacitor without forming a direct physical attachment therebetween; and
  
  a conductive terminal pin extending through the capacitor and the inductor, the terminal pin extending through the inductor in non-conductive relation and conductively coupled to the first set of electrode plates.
- View Dependent Claims (174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212)
- - 174. The assembly of claim 173, wherein the maintaining means comprises a lock associated with the terminal pin.
  - 175. The assembly of claim 174, wherein the lock comprises a mechanical lock.
  - 176. The assembly of claim 174, wherein the lock comprises a deformation in the terminal pin.
  - 177. The assembly of claim 174, wherein the lock comprises a cured polymer.
  - 178. The assembly of claim 173, wherein the maintaining means comprises a wire bond pad attached to the terminal pin.
  - 179. The assembly of claim 178, including a non-conductive substrate disposed between the wire bond pad and the inductor.
  - 180. The assembly of claim 173, wherein the active implantable medical device comprises a cardiac pacemaker, an implantable defibrillator, a cochlear implant, a neurostimulator, a drug pump, a ventricular assist device, an implantable sensing system, a gastric pacemaker or a prosthetic device.
  - 181. The assembly of claim 173, wherein the inductor is bonded to the capacitor utilizing a non-conductive polyimide, glass, Paralyne, a ceramic bonding material, epoxy, silicone, or a thermal plastic supportive tape adhesive.
  - 182. The assembly of claim 173, wherein the inductor comprises a material selected from cobalt zinc ferrite, nickel zinc ferrite, manganese zinc ferrite, powdered iron, or molypermalloy.
  - 183. The assembly of claim 173, including a conformal coating over the inductor comprising Paralyne.
  - 184. The assembly of claim 173, including an insulator disposed between the inductor and the terminal pin, wherein the insulator comprises a non-conductive polymer.
  - 185. The assembly of claim 184, wherein the non-conductive polymer comprises an epoxy, a thermal-setting non-conductive adhesive, a non-conductive polyimide, or a silicone material.
  - 186. The assembly of claim 173, including a second inductor through which the terminal pin extends in non-conductive relation.
  - 187. The assembly of claim 186, wherein the inductors are disposed adjacent to one another.
  - 188. The assembly of claim 187, comprising at least one additional inductor stacked onto another one of the inductors.
  - 189. The assembly of claim 187, wherein the inductors are each comprised of materials having different physical or electrical properties.
  - 190. The assembly of claim 187, wherein the inductors are each comprised of materials having the same physical or electrical properties.
  - 191. The assembly of claim 186, wherein the inductors are disposed on opposite sides of the capacitor.
  - 192. The assembly of claim 191, wherein at least one of the inductors is disposed on a body fluid side of the feedthrough terminal assembly.
  - 193. The assembly of claim 191, wherein the second inductor is disposed adjacent to the ferrule.
  - 194. The assembly of claim 191, wherein the inductors are disposed adjacent to opposing surfaces of the capacitor.
  - 195. The assembly of claim 194, wherein the inductors are bonded to the capacitor.
  - 196. The assembly of claim 194, wherein the capacitor and the inductors are disposed within and conductively isolated from the ferrule.
  - 197. The assembly of claim 173, wherein the capacitor and the inductor are housed within the ferrule.
  - 198. The assembly of claim 197, including an insulative cap disposed over the inductor opposite the capacitor.
  - 199. The assembly of claim 173, wherein the capacitor is disposed on a body fluid side of the feedthrough terminal assembly.
  - 200. The assembly of claim 173, wherein the feedthrough capacitor comprises first and second feedthrough capacitors associated with the inductor in non-conductive relation.
  - 201. The assembly of claim 200, wherein the first and second feedthrough capacitors are disposed adjacent to opposing surfaces of the inductor.
  - 202. The assembly of claim 201, wherein the capacitors are bonded to the inductor.
  - 203. The assembly of claim 201, wherein each capacitor is internally grounded.
  - 204. The assembly of claim 200, wherein the first and second capacitors each include a first set of electrode plates conductively coupled to the terminal pin, and a second set of electrode plates conductively coupled to the ferrule.
  - 205. The assembly of claim 204, wherein the first capacitor comprises an externally grounded capacitor, and the second capacitor comprises an internally grounded capacitor, the feedthrough terminal assembly further including a conductive material extending through both the first and second feedthrough capacitors to conductively couple the second set of electrode plates of the second capacitor with the second set of electrode plates of the first capacitor.
  - 206. The assembly of claim 205, wherein the first and second feedthrough capacitors are disposed adjacent to opposing surfaces of the inductor.
  - 207. The assembly of claim 205, wherein the conductive material comprises a thermal setting conductive adhesive, a solder, or a solder paste.
  - 208. The assembly of claim 205, wherein the conductive material comprises a conductive pin.
  - 209. The assembly of claim 208, wherein the conductive pin comprises a nail head pin.
  - 210. The assembly of claim 208, wherein the conductive pin comprises a pin attached to an underlying hermetic insulator.
  - 211. The assembly of claim 173, including an hermetic insulator disposed between the terminal pin and the ferrule, wherein the capacitor is disposed adjacent to the hermetic insulator.
  - 212. The assembly of claim 211, wherein the inductor and the capacitor each include an aperture through which a leak detection gas can be detected.

213. A feedthrough terminal assembly for an active implantable medical device, comprising:
- a conductive ferrule conductively coupled to a housing of the active implantable medical device;
  
  a feedthrough capacitor having first and second sets of electrode plates, the second set of electrode plates being conductively coupled to the ferrule;
  
  an inductor associated with the capacitor in non-conductive relation;
  
  means for maintaining the inductor in close association with the capacitor without forming a direct physical attachment therebetween; and
  
  a conductive terminal pin extending through the capacitor and the inductor, the terminal pin extending through the inductor in non-conductive relation and conductively coupled to the first set of electrode plates;
  
  wherein the capacitor'"'"'s second set of electrode plates are internally grounded to the ferrule.
- View Dependent Claims (214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252)
- - 214. The assembly of claim 213, wherein the maintaining means comprises a lock associated with the terminal pin.
  - 215. The assembly of claim 214, wherein the lock comprises a mechanical lock.
  - 216. The assembly of claim 214, wherein the lock comprises a deformation in the terminal pin.
  - 217. The assembly of claim 214, wherein the lock comprises a cured polymer.
  - 218. The assembly of claim 213, wherein the maintaining means comprises a wire bond pad attached to the terminal pin.
  - 219. The assembly of claim 218, including a non-conductive substrate disposed between the wire bond pad and the inductor.
  - 220. The assembly of claim 213, wherein the active implantable medical device comprises a cardiac pacemaker, an implantable defibrillator, a cochlear implant, a neurostimulator, a drug pump, a ventricular assist device, an implantable sensing system, a gastric pacemaker or a prosthetic device.
  - 221. The assembly of claim 213, wherein the inductor is bonded to the capacitor utilizing a non-conductive polyimide, glass, Paralyne, a ceramic bonding material, epoxy, silicone, or a thermal plastic supportive tape adhesive.
  - 222. The assembly of claim 213, wherein the inductor comprises a material selected from cobalt zinc ferrite, nickel zinc ferrite, manganese zinc ferrite, powdered iron, or molypermalloy.
  - 223. The assembly of claim 213, including a conformal coating over the inductor comprising Paralyne.
  - 224. The assembly of claim 213, including an insulator disposed between the inductor and the terminal pin, wherein the insulator comprises a non-conductive polymer.
  - 225. The assembly of claim 224, wherein the non-conductive polymer comprises an epoxy, a thermal-setting non-conductive adhesive, a non-conductive polyimide, or a silicone material.
  - 226. The assembly of claim 213 including a second inductor through which the terminal pin extends in non-conductive relation.
  - 227. The assembly of claim 226, wherein the inductors are disposed adjacent to one another.
  - 228. The assembly of claim 227, comprising at least one additional inductor stacked onto another one of the inductors.
  - 229. The assembly of claim 226, wherein the inductors are each comprised of materials having different physical or electrical properties.
  - 230. The assembly of claim 226, wherein the inductors are each comprised of materials having the same physical or electrical properties.
  - 231. The assembly of claim 226, wherein the inductors are disposed on opposite sides of the capacitor.
  - 232. The assembly of claim 231, wherein at least one of the inductors is disposed on a body fluid side of the feedthrough terminal assembly.
  - 233. The assembly of claim 231, wherein the second inductor is disposed adjacent to the ferrule.
  - 234. The assembly of claim 231, wherein the inductors are disposed adjacent to opposing surfaces of the capacitor.
  - 235. The assembly of claim 234, wherein the inductors are bonded to the capacitor.
  - 236. The assembly of claim 234, wherein the capacitor and the inductors are disposed within and conductively isolated from the ferrule.
  - 237. The assembly of claim 213, wherein the capacitor and the inductor are housed within the ferrule.
  - 238. The assembly of claim 237, including an insulative cap disposed over the inductor opposite the capacitor.
  - 239. The assembly of claim 213, wherein the capacitor is disposed on a body fluid side of the feedthrough terminal assembly.
  - 240. The assembly of claim 213, wherein the feedthrough capacitor comprises first and second feedthrough capacitors associated with the inductor in non-conductive relation.
  - 241. The assembly of claim 240, wherein the first and second feedthrough capacitors are disposed adjacent to opposing surfaces of the inductor.
  - 242. The assembly of claim 241, wherein the capacitors are bonded to the inductor.
  - 243. The assembly of claim 241, wherein each capacitor is internally grounded.
  - 244. The assembly of claim 241, wherein the first and second capacitors each include a first set of electrode plates conductively coupled to the terminal pin, and a second set of electrode plates conductively coupled to the ferrule.
  - 245. The assembly of claim 244, wherein the first capacitor comprises an externally grounded capacitor, and the second capacitor comprises an internally grounded capacitor, the feedthrough terminal assembly further including a conductive material extending through both the first and second feedthrough capacitors to conductively couple the second set of electrode plates of the second capacitor with the second set of electrode plates of the first capacitor.
  - 246. The assembly of claim 245, wherein the first and second feedthrough capacitors are disposed adjacent to opposing surfaces of the inductor.
  - 247. The assembly of claim 245, wherein the conductive material comprises a thermal setting conductive adhesive, a solder, or a solder paste.
  - 248. The assembly of claim 245, wherein the conductive material comprises a conductive pin.
  - 249. The assembly of claim 248, wherein the conductive pin comprises a nail head pin.
  - 250. The assembly of claim 248, wherein the conductive pin comprises a pin attached to an underlying hermetic insulator.
  - 251. The assembly of claim 213, including an hermetic insulator disposed between the terminal pin and the ferrule, wherein the capacitor is disposed adjacent to the hermetic insulator.
  - 252. The assembly of claim 251, wherein the inductor and the capacitor each include an aperture through which a leak detection gas can be detected.

Specification

Resources

Litigation Campaign Assessment

Current Assignee
Greatbatch Limited (Greatbatch Incorporated)
Original Assignee
Greatbatch-Sierra, Inc.
Inventors
Frysz, Christine A., Brendel, Richard L., Stevenson, Robert A., Hussein, Haytham
Primary Examiner(s)
LAYNO, CARL HERNANDZ

Application Number

US10/825,900
Publication Number

US 20040257747A1
Time in Patent Office

670 Days
Field of Search

607 2- 5, 607/9, 607 36- 58, 361/302, 361/306, 361/306.1
US Class Current

607/37
CPC Class Codes

A61N 1/3754   Feedthroughs

H03H 1/0007   of radio frequency interfer...

H03H 2001/0042   Wound, ring or feed-through...

Inductor capacitor EMI filter for human implant applications

First Claim

7 Assignments

0 Petitions

Accused Products

Abstract

Citations

252 Claims

Specification

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Inductor capacitor EMI filter for human implant applications

First Claim

7 Assignments

Subscription Required

Subscription Required

0 Petitions

Subscription Required

Accused Products

Subscription Required

Abstract

Citations

252 Claims

Specification

Subscription Required

Solutions

Use Cases

Quick Links