Lead frame and strip molding for contact connectors in implantable medical devices

• US 6,884,122 B2
• Filed: 10/25/2001
• Issued: 04/26/2005
• Est. Priority Date: 10/25/2001
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Fraley, Mary A., Robinson, Scott J., Ries, Andrew J., Kast, John E., Clayton, Jeffrey J., Roles, Randy
• Primary Examiner(s): Bradley, P. Austin
• Assistant Examiner(s): Figueroa, Felix O.
• Application Number:
  US10/045,340
• Publication Number:
  US 20030082958A1
• Time in Patent Office: 1,279 Days
• Field of Search: 439/885, 439/722, 439/909, 439/910, 439/887, 439/606, 298/58, 298/83, 298/60, 607/37, 607/128
• US Class Current: 439/722
• CPC Class Codes: A61N 1/3752 Details of casing-lead connections
• CPC Class Codes: H01R 2201/12 for medicine and surgery
• CPC Class Codes: H01R 43/24 Assembling by moulding on contact members
• CPC Class Codes: Y10S 439/909 Medical use or attached to human body

Abstract

An apparatus and method of electrically connecting components of an implantable medical device are disclosed. One embodiment is an apparatus having at least one electrical connector comprising a tab section and a housing at least partially enclosing the electrical connectors, wherein the housing is molded into sealing engagement with the electrical connectors and the tab section is capable of removal from the electrical connector after the housing is molded.

Claims

1. An electrical connector in combination with an implantable medical device (IMD), for establishing permanent electrical communication between internal components of the IMD wherein said internal components couple to deployable medical electrical leads, comprising:

a molded housing of insulating material adapted to sealingly couple to a surface of the IMD, said housing comprising a plurality of contact pad-receiving interlocking structures;

a metallic insert having each of a plurality of wire contact pads sealingly secured to one of the plurality of contact pad-receiving interlocking structures of the molded housing wherein said insert includes a manually removable tab attached to the plurality of wire contact pads of the stamped insert so the removable tab and wire contact pads are in common electrical communication, and wherein the wire contact pads are sized to receive an end portion of an electrical wire; and

means formed in said molded housing adapted for guiding the end portion of the electrical wire to each wire contact pad.

2. A connector of claim 1, wherein the insulating material comprises moldable plastic and wherein the means formed in said molded housing further comprises at least one aperture.

3. A connector of claim 1, wherein the insulating material comprises one of the group:

a glass material, a resin-based material, a thermoplastic material.

4. A connector of claim 1, wherein the metallic insert comprises a set of thin, spaced apart members.

5. The connector of claim 1, wherein the manually removable tab comprises a scribed line disposed on a surface of the manually removable tab.

6. An apparatus in combination with an implantable medical device (IMD), for permanently connecting electrically-conducting components of the IMD so that deployable medical electrical leads can be coupled thereto, comprising:

at least one electrical connector comprising a tab section and a plurality of spaced-apart electrically conducting wire bonding pads in common electrical communication; and

a non-conductive housing at least partially enclosing the plurality of spaced-apart electrically conducting wire bonding pads of the at least one electrical connector, wherein said non-conductive housing comprises a plurality of structures adapted to mechanically interlock and individually retain each of the spaced-apart electrically conducting wire bonding pads, and wherein the at least one electrical connector is adapted to assist manual separation of the tab section from the plurality of spaced-apart electrically bonding pads, and wherein the wire bonding pads comprise a substantially flat wire-receiving portion.

7. An apparatus according to claim 6, wherein the apparatus is adapted to provide electrical connection between a plurality of electrical components internal and external to the implantable medical device.

8. An apparatus according to claim 6, wherein the at least one electrical connector comprises a series of electrical connectors temporarily attached by the tab section and thereby temporarily commonly electrically coupled together.

9. An apparatus according to claim 8, wherein the series of electrical connectors are adapted to be manually segmented into discrete components.

10. An apparatus according to claim 6, wherein the apparatus is a component of a header assembly for an IMD.

11. An apparatus according to claim 6, wherein the housing further comprises one of an wire-admitting aperture and a wire-guiding groove feature adjacent one of the wire bonding pads.

12. An apparatus according to claim 6, wherein the housing comprises moldable plastic.

13. An apparatus according to claim 6, wherein the housing comprises one of the group:

a glass material, a resin-based material, a thermoplastic material.

14. An apparatus according to claim 6, wherein the at least one electrical connector conducts electrical signals between a plurality of contact surfaces on each electrical connector, wherein the housing provides isolation between the at least one electrical connector and the spaced-apart electrically conducting wire bonding pads.

15. An apparatus according to claim 14, wherein a plurality of electrical wires which couple to a similar plurality of electrical components are welded to the plurality of electrical contacts.

16. An apparatus according to claim 6, wherein the at least one electrical connector comprise an electrically conductive metallic material.

17. An apparatus according to claim 6, wherein the at least one electrical connector comprise a base metal.

18. An apparatus according to claim 17, wherein the metal comprises one of the group:

a gold material, a nickel material, and alloys thereof.

19. An apparatus according to claim 6, wherein the implantable medical device comprises at least one of a pacemaker, a cardioverter, a defibrillator, a neural stimulator, and a drug administering device.

20. A feedthrough arrangement in combination with an implantable medical device (IMD), for establishing permanent electrical communication between internal circuits of the IMD and at least one removeable remote electrical component, comprising:

a plurality of spaced-apart electrical contacts for conducting electrical signals communicated through a plurality of elongated conductors in common electrical communication with a removable tab portion;

a molded housing comprising an electrical insulating material, the molded housing enclosing a portion of the plurality of electrical contacts, the housing disposed in sealing engagement with said portion of the plurality of electrical contacts, the housing further comprising a plurality of apertures, wherein the plurality of apertures are adapted for receiving wire-bonded electrical wires for permanent connection with the plurality of electrical contacts; and

wherein the feedthrough arrangement is a component of the IMD.

21. A feedthrough arrangement according to claim 20, wherein the housing comprises one of:

a moldable plastic material, a thermoplastic material, a resin-based material.

22. A feedthrough arrangement according to claim 20, wherein the housing comprises one of:

a glass material, a ceramic material, a dielectric material.

23. A feedthrough arrangement according to claim 20, further comprising:

the housing having an opening and the housing defining a first side of the housing; and

wherein the plurality of electrical contacts extend from the first side of the housing to a second side of the housing.

24. A feedthrough arrangement according to claim 20, wherein the plurality of apertures extend from a first side of the housing to a second side of the housing.

25. A feedthrough arrangement according to claim 23, wherein the plurality of electrical contacts conduct electrical signals between the first side and the second side and the housing provides isolation between the first and second sides.

26. A feedthrough arrangement according to claim 25, wherein the plurality of electrical contacts are welded to the electrical wires that are disposed through the plurality of apertures.

27. A feedthrough arrangement according to claim 20, wherein the plurality of electrical contacts comprise a metal.

28. A feedthrough arrangement according to claim 20, wherein the plurality of electrical contacts comprise a geometrically shaped member.

29. A feedthrough arrangement according to claim 28, wherein the plurality of electrical contacts comprise a base metal and wherein said base metal is chosen from the group comprising:

a gold material, a nickel material, and alloys of the gold material and the nickel material.

30. A feedthrough arrangement according to claim 20, wherein the housing and the plurality of electrical contacts are disposed within a header module of an IMD.

31. A feedthrough arrangement according to claim 30, wherein the IMD comprises at least one of:

a pacemaker, a cardioverter, a defibrillator, a neural stimulator, and a drug administering device.

32. An electrical connector in combination with an implantable medical device (IMD), for permanently coupling a plurality of elongated electrical wires to circuitry disposed within the IMD comprising:

an insert member comprising a plurality of electrical contact pads and a connecting tab severably connected to the plurality of electrical contact pads; and

an electrically insulative housing, the housing comprising discrete interlocking structures in contact with and retaining each of the plurality of electrical contact pads;

wherein each of the contact pads of the electrical connector is a component in the IMD.

33. An electrical connector according to claim 32, wherein the connecting tab is readily manually detachable from the plurality of electrical contacts.

34. An electrical connector according to claim 32, wherein the plurality of electrical contact pads provide electrical communication between components operatively coupled to the IMD.

35. An electrical connector according to claim 32, wherein the electrically insulative housing comprises a moldable plastic material.

36. An electrical connector according to claim 32, wherein the electrically insulative housing comprises one of a glass material and a ceramic material.

37. An electrical connector according to claim 32, wherein the electrically insulative housing comprises a plurality of apertures capable of communicating electrical wires through the plurality of apertures and to the plurality of electrical contacts.