Thin profile stacked layer contact

• US 9,166,321 B2
• Filed: 03/22/2011
• Issued: 10/20/2015
• Est. Priority Date: 03/22/2011
• Status: Active Grant

• Current Assignee: Cirtec Medical Corp., Qig Group LLC
• Original Assignee: Greatbatch Limited (Greatbatch Incorporated)
• Inventors: Smith, Alexander K., Kelsch, Daniel N.
• Primary Examiner(s): DIETRICH, JOSEPH M
• Application Number:
  US13/053,640
• Publication Number:
  US 20120245664A1
• Time in Patent Office: 1,673 Days
• Field of Search: 607/117, 607/119
• US Class Current: 1/1
• CPC Class Codes: A61N 1/3752 Details of casing-lead connections
• CPC Class Codes: H01R 13/111 co-operating with pins having a circular transverse section
• CPC Class Codes: H01R 2201/12 for medicine and surgery
• CPC Class Codes: H01R 24/58 Contacts spaced along longitudinal axis of engagement

Abstract

A connector is described herein that includes a plurality of layers patterned in two dimensions and joined in a stack with a bore there through. At least a subset of the plurality of layers are contact layers that include deflectable members (e.g., springs) that deflect in plane or out of plane upon insertion of a lead into the bore through the connector. The deflectable members form redundant electrical connections with the lead when the lead is inserted into the bore. For example, the connector can be incorporated into an implantable medical device (e.g., IPG). Moreover, methods of manufacturing a connector are set forth herein.

Claims

1. An electrical connector, comprising:

a plurality of layers with respective cylindrical apertures therethrough, wherein the plurality of layers are joined in a stack with the respective cylindrical apertures aligned to define a bore through the stack, wherein a lead is receivable in the bore; and

at least one of the plurality of layers being a contact block comprised of a conductive material that includes a plurality of individual thin deflector layers, w herein each one of said individual thin deflector layers comprises a plurality of integral deflectable members each having an end portion or flag extending into the bore of the contact block from a wall of the cylindrical aperture of the respective deflector layer, wherein the deflectable members end portions or tabs are deflected by the lead such that the deflectable members of all of said individual thin layers of the contact block act in concert to form an electrical connection with a given conductive portion of the lead when the lead is received in the bore.

2. The electrical connector of claim 1, wherein the deflectable members are deflectable in a plane.

3. The electrical connector of claim 1, wherein the deflectable members are deflectable out of a plane.

4. The electrical connector of claim 1, wherein the deflectable members and a remainder of the contact layer are contiguous.

5. The electrical connector of claim 1, wherein the deflectable members are cantilevered beams.

6. The electrical connector of claim 1, wherein the deflectable members are cantilevered spirals.

7. The electrical connector of claim 1, wherein the deflectable members are cantilevered serpentine structures.

8. The electrical connector of claim 1, wherein the deflectable members are simply supported beams that comprise flags.

9. The electrical connector of claim 8, wherein the simply supported beams are twisted by the flags being displaced by the lead when the lead is received in the bore.

10. The electrical connector of claim 1, wherein the deflectable members of the contact layer extend into an aperture through the contact layer.

11. The electrical connector of claim 1, wherein a thickness of the contact layer is less than 0.006 inches.

12. The electrical connector of claim 1, wherein a thickness of the contact layer is less than 0.005 inches.

13. The electrical connector of claim 1, wherein said contact block further comprises at least two spacer layers, wherein at least one of the plurality of deflector layers is positioned between and adjacent to the two spacer layers, and the two spacer layers provide space for the deflectable members of the adjacent deflector layers to move within the respective apertures through the two spacer layers.

14. The electrical connector of claim 1, wherein at least one of the plurality of layers is a stop layer that limits out of plane motion of the deflectable members of a contact layer.

15. The electrical connector of claim 1, wherein at least one of the plurality of layers is an outer layer that makes contact with the lead as it is inserted into the bore to align the lead for insertion.

16. The electrical connector of claim 1, wherein the plurality of layers are made of a conductive material.

17. The electrical connector of claim 16, wherein the conductive material is one of stainless steel, titanium, nickel, chromium, carbon, zirconium, niobium, molybdenum, palladium, hafnium, tantalum, tungsten, iridium, platinum, gold, or an alloy thereof.

18. The electrical connector of claim 1, wherein the contact layer is made of a conductive material and at least one of the plurality of layers other than the contact layer is made of a non-conductive material.

19. The connector of claim 1, wherein said contact block further comprises at least one additional layer provided between two of said individual deflector layers, said one additional layer being comprised of said conductive material without having any of the deflectable members.

20. The connector of claim 1, wherein said contact block further comprises at least one additional layer provided next to at least one of said individual deflector layers, said one additional layer being comprised of said conductive material without having any of the deflectable members and having a cylindrical aperture smaller than apertures formed in the individual deflector layers.

21. A medical system, comprising:

a lead with a proximal end and a distal end, wherein the proximal end includes a plurality of inline contact portions separated by insulator portions, and the distal end at least one of includes, or is coupled to, a plurality of electrodes; and

an implantable medical device, comprising;

a housing that is hermetically sealed to provide an enclosure for at least one of control circuitry, a power supply, or a charging coil; and

a header that includes a connector comprised of a plurality of contact blocks that are electrically connected to the at least one of the control circuitry, the power supply, or the charging coil, wherein the connector defines a bore through the contact blocks in which the lead is receivable to form electrical connections between the contact portions of the lead and the contact blocks, the contact blocks each include a plurality of stacked and joined layers with respective cylindrical apertures there through to define the bore, and at least a plurality of the stacked and joined layers of each of the contact blocks being a conductive contact layer that includes integral deflectable members each having an end portion or flag extending from a wall of the cylindrical aperture of the conductive contact layer into the bore that is deflected by the lead and forms electrical connections with the contact portions of a pin on the lead when the lead is received in the bore such that for each contact portion of the pin, a plurality of layers that include integral deflectable members are arranged, each separated by at least one conductive layer not comprising deflectable members, for working in concert for contacting any given contact portion.

22. The medical system of claim 21, wherein the implantable medical device is an Implanted Pulse Generator (IPG).

23. The medical system of claim 21, wherein the deflectable members are at least one of cantilevered beams, cantilevered spirals, cantilevered serpentine structures, or simply supported beams that comprise flags.

24. The medical system of claim 21, wherein the plurality of stacked and joined layers of each of the contact blocks is made of a conductive material.

25. The medical system of claim 24, wherein the conductive material is one of stainless steel, titanium, nickel, chromium, carbon, zirconium, niobium, molybdenum, palladium, hafnium, tantalum, tungsten, iridium, platinum, gold, or an alloy thereof.

26. The medical system of claim 21, wherein the plurality of contact blocks are separated by seals.

27. The medical system of claim 21, wherein contact layers from the plurality of stacked and joined layers are made of a conductive material, and at least a subset of other layers from the plurality of stacked and joined layers are made of a non-conductive material.

28. A method of manufacturing, comprising:

fabricating a plurality of layers of a connector, wherein the plurality of layers include respective cylindrical apertures there through and at least a subset of the plurality of layers are conductive contact layers that include a plurality of deflector layers each having integral deflectable members patterned in two dimensions, said deflectable members each having an end portion or flag extending into a bore formed by the apertures from a wall of the apertures of the contact layer;

stacking the plurality of layers with the respective apertures aligned to define the bore through a stack of the plurality of layers such that a plurality of deflector layers are stacked and arranged in concert to contact a common conductive contact portion on a pin; and

joining the stack of the plurality of layers to yield at least a portion of the connector with the bore there through.

29. The method of claim 28, further comprising fabricating the plurality of layers of the connector via employing at least one of wire electric discharge machining (EDM), laser cutting, or photolithography.

30. The method of claim 28, wherein the plurality of layers that are fabricated further include one or more of stop layers, outer layers, or spacer layers.

31. The method of claim 28, wherein each of the contact layers are stacked between and adjacent to two spacer layers.

32. The method of claim 28, further comprising joining the stack of the plurality of layers at least one of mechanically, with adhesives, or through bonding.

33. The connector of claim 28, wherein each adjacent pair of said plurality of deflector layers are stacked and arranged in concert with at least one additional conductor layer provided there between, each of the additional conductive layers having a cylindrical aperture without integral deflectable members.

34. An electrical connector, comprising:

a plurality of contact blocks each associated with a respective contact portion of a pin and having a bore therethrough, wherein said contact blocks are separated from each other by an insulating component and wherein each contact block is comprised of;

a plurality of deflector layers, each deflector layer being comprised of a conductive material that includes a plurality of integral deflectable members each having an end portion or flag extending into a bore of the deflector layer, wherein the deflectable members end portions or tabs are deflected by the pin such that the deflectable members of all of said deflector layers of the contact block act in concert to form an electrical connection with the associated contact portion of the pin when the pin is received in the bore, and

at least one separator layer, each separator layer being configured without deflectable members and having a bore to receive the associated contact portion of the pin.