Improved feedthrough for automated external wiring

Abstract

The present invention relates to an implantable medical device (1), comprising: a housing (2), an electrical feedthrough (3) arranged on the housing (2), wherein the electrical feedthrough (3) comprises a first electrical insulator (30), a flange (31) connected to the insulator (30) and a first plurality of feedthrough pins (32) extending through the first electrical insulator (30) and being arranged in a single row along a first direction (D), a wiring assembly comprising plastic body (40) and a plurality of electrical conductors (41) being supported by the plastic body (40) and being connected to the feedthrough pins (32), and a protrusion (33, 330) protruding from the flange (31), wherein the plastic body (40) comprises a connecting member (42) that engages with the protrusion (33) to connect the plastic body to the flange (31).

Description

[0001] Applicant: BIOTRONIK SE & Co. KG

[0002] Date: 04.09.2025

[0003] Our Reference: 23.084P-WO

[0004] Improved feedthrough for automated external wiring

[0005] The present invention relates to an implantable medical device and to a method for an assembly of such an implantable medical device.

[0006] Current implantable medical devices typically have a two-piece titanium housing and an electrical feedthrough that are welded together after the internal structure of the implantable medical device is assembled. The pins of the feedthrough are connected to the electrode terminals via individual external wiring strips. Known feedthroughs have two rows of pins offset from each other. The outer wiring conductors (e.g., ribbons), which have a sleeve formed at the end, are manually slid onto the pins and then connected to the pins by laser spot welding. The outer wiring conductors and the electrode connections are then encapsulated with a plastic material, e.g., an epoxy resin, thereby forming the header. To improve the bonding behavior of the resin header to the housing, anchors are attached to the housing by means of resistance welding. These provide a mechanical anchorage between the housing and the header.

[0007] Regardless of the connection method (laser spot welding, resistance welding, bonding), a sufficient accessibility of the feedthrough pins is necessary for automated external wiring. Particularly, each of the feedthrough pins has to be accessible from the same two sides, wherein particularly the two sides oppose each other. This is not given by the staggered pin rows of known feedthroughs. For resistance welding and bonding, accessibility for the appropriate tool is necessary. For laser spot welding, a technical zero gap must be ensured via so-called hold-downs. Within the automation, no changes in the orientation of the device are desired between the assembly of the outer wiring strips and the connection to the feedthrough pins. This would mean a complex and non-value-adding process step within the manufacturing sequence. Furthermore, the handling of the individual outer wiring conductors has a disadvantage in the case of automation. On the one hand, the individual assembly increases the cycle time, and on the other hand, the positioning of the conductors is not ensured during transport from the assembly cell to the welding cell. This may lead to incorrect positioning before the welding process.

[0008] Further, welding the anchors to the housing requires a process step within the production flow that requires time and resources for equipment development, monitoring and maintenance.

[0009] Based on the above, the problem to be solved by the present invention is to provide an implantable medical device having a feedthrough design that enables automated external wiring and ensures mechanical anchoring between the feedthrough and the header.

[0010] This problem is solved by an implantable medical device having the features of claim 1. Preferred embodiments of this aspect of the present invention are stated in the dependent claims and are described below. A further aspect of the present invention relates to a method for assembling such an implantable medical device.

[0011] According to claim 1 an implantable medical device is disclosed, wherein the implantable medical device comprises:

[0012] - a housing,

[0013] - an electrical feedthrough connected to the housing, wherein the electrical feedthrough comprises a first electrical insulator, a flange connected to the first electrical insulator and a first plurality of feedthrough pins extending through the first electrical insulator and being arranged in a single row along a first direction,

[0014] - a wiring assembly comprising plastic body and a plurality of electrical conductors (e.g. wiring ribbons) being supported by the plastic body, wherein each of the first plurality of feedthrough pins is to an electrical conductor of the plurality of electrical conductors in an electrically conducting fashion, and

[0015] - a protrusion protruding from the flange, wherein the plastic body comprises a connecting member that engages with the protrusion to connect the plastic body to the flange.

[0016] 23.084P-WO |04.09. 2025 According to an embodiment of the implantable medical device, the latter comprises a circuit arranged in an interior space enclosed by the housing, wherein particularly the circuit is connected via the feedthrough pins of the electrical feedthrough to the electrical conductors.

[0017] Furthermore, according to yet another embodiment, the plastic body is an injection molded plastic body, wherein particularly the electrical conductors are partially embedded in the plastic body.

[0018] Further, in an embodiment, for engaging with the protrusion, the protrusion is configured to guide the connecting member in a mounting direction running orthogonal to said first direction.

[0019] According to a further embodiment, for guiding the connecting member, the protrusion comprises a guiding portion extending along the mounting direction and configured to slide in a groove of the connecting member upon engagement of the connecting member with the protrusion. Particularly, the groove extends in the mounting direction.

[0020] In a further embodiment, the protrusion comprises a hole, particularly a through-hole, wherein for engaging with the protrusion, the connecting member is configured to slide along the protrusion by being inserted with an insertion portion of the connecting member into the hole in the mounting direction. Particularly, said insertion portion can be a pin, such as a cylindrical pin.

[0021] According to yet another embodiment, the connecting member comprises a latching lug configured to engage behind an edge of the protrusion to secure the connecting member on the protrusion.

[0022] Furthermore, in an embodiment, the connecting member comprises a further latching lug arranged opposite the latching lug so that the insertion portion (e.g., pin) is arranged between the two latching lugs. Particularly, the further latching lug is configured to engage behind a

[0023] 23.084P-WO |04.09. 2025 further edge of the protrusion that is arranged opposite the edge of the protrusion behind which the latching lug engages to secure the connecting member on the protrusion.

[0024] In an embodiment, the electrical feedthrough comprises a second electrical insulator arranged besides the first electrical insulator in the first direction and a second plurality of feedthrough pins of the electrical feedthrough extending through the further electrical insulator and being also arranged in a single row along the first direction, wherein each of the second plurality of feedthrough pins is connected to an electrical conductor of the plurality of conductors of the wiring assembly in an electrically conductive fashion.

[0025] Further, according to an embodiment, the implantable medical device comprises a further protrusion protruding from the flange, wherein the plastic body comprises a further connecting member that is configured to engage with the further protrusion to connect the plastic body to the flange. Particularly, in an embodiment, for engaging with the further protrusion, the further protrusion is configured to guide the further connecting member in the mounting direction. Furthermore, in an embodiment, the further connecting member comprises a latching lug configured to engage behind an edge of the further protrusion to secure the connecting member on the further protrusion. Furthermore, according to yet another embodiment, the electrical insulator is arranged between the two protrusions. The feedthrough may comprise two separate electrical insulators (first and second insulator, see above). Particularly, both insulators are arranged between the two opposing protrusions of the flange.

[0026] Furthermore, according to an embodiment the (e.g., single) protrusion of the flange of the feedthrough is arranged between the first electrical insulator and the second electrical insulator with respect to the first direction. This arrangement is particularly useful in case of the protrusion that comprises the hole for receiving the insertion portion (e.g., pin) of the connecting member (see also above).

[0027] According to yet another embodiment of the invention, the implantable medical device comprises a connector assembly, the connector assembly comprising at least one connector, particularly in form of a plug socket, particularly for receiving a plug of an electrode lead,

[0028] 23.084P-WO |04.09. 2025 the connector being electrically connected to at least one feedthrough pin via an electrical conductor of said plurality of electrical conductors of the wiring assembly. In one embodiment, the connector assembly comprise an IS-l / DF-1 connector. In one embodiment, the connector assembly comprises an IS-4 / DF-4 connector. In one embodiment, the connector assembly comprises an IS-l / DF-1 connector and an IS-4 / DF-4 connector. In one embodiment, the connector assembly comprises two IS-l / DF-1 connectors and an IS-4 / DF- 4 connector. In one embodiment, the connector assembly comprises an IS-l / DF-1 connector and two IS-4 / DF-4 connectors.

[0029] Furthermore, in an embodiment, the plastic body comprises a fixation member for fixing the connector assembly of a part thereof with respect to the plastic body and housing.

[0030] In an embodiment, the fixation member is inserted into a recess of the connector assembly. Alternatively, the fixation member may be configured to at least partially encompass a portion of the connector assembly.

[0031] Furthermore, according to an embodiment of the implantable medical device, the latter comprises a ground pin connected to the flange of the electrical feedthrough.

[0032] Furthermore, according to yet another embodiment of the implantable medical device, the flange of the electrical feedthrough comprises a flat elevated surface portion forming a suction surface for a vacuum gripper for an SMD process.

[0033] According to a further embodiment of the implantable medical device, the wiring assembly (the plastic body and the plurality of electrical conductors, particularly wiring ribbons) and the connector assembly are embedded in the header body, wherein particularly the header body is formed out of a plastic material, particularly an epoxy resin. Particularly, the wiring assembly, the connector assembly, and the header body form components of a header that is connected to the housing and is configured to provide an electrical connection via the feedthrough to the circuit accommodated in the housing, e.g. to connect an electrode lead via the connector (e.g. plug socket) of the connector assembly and the electrical feedthrough to the circuit.

[0034] 23.084P-WO |04.09. 2025 Furthermore, in an embodiment, the header body is anchored to the flange via the at least one protrusion of the flange of the electrical feedthrough.

[0035] Further, in an embodiment, the header body is formed out of a plastic material, particularly an epoxy resin. Particularly, the plastic material may embed the protrusion(s) and portions of the plastic body connected thereto so that the protrusion(s) may serve as an anchor of the header body / header.

[0036] According to yet another aspect of the present invention, a method for assembling an implantable medical device is disclosed, the method comprising the steps of: providing a housing of an implantable medical device, the housing comprising an electrical feedthrough arranged on the housing, wherein the electrical feedthrough comprises a first electrical insulator, a flange connected to the insulator, feedthrough pins extending through the first electrical insulator and being arranged in a single row along a first direction, and at least one protrusion, connecting a wiring assembly comprising a plastic body a plurality of electrical conductors (e.g., wiring ribbons) being supported by the plastic body by engaging a connecting member of the plastic body with the protrusion of the flange of the electrical feedthrough, and electrically connecting each of the plurality of feedthrough pins to an electrical conductor of the plurality of the electrical conductors.

[0037] Particularly, when the plastic body is connected to the protrusion as intended, each electrical conductor contacts an associated feedthrough pin.

[0038] According to an embodiment of the method, the method comprises the further step of connecting the respective electrical conductor to the associated feedthrough pin by soldering or welding (particularly laser welding or resistance welding). Particularly this is possible by having the feedthrough pins arranged in a single row so that one feedthrough pin does not block access to another feedthrough pin.

[0039] 23.084P-WO |04.09. 2025 Furthermore, according to yet another embodiment of the method, the method comprises the further step of fixing a connector assembly (as disclosed in the above-described embodiments) with respect to the housing by a fixation member of the plastic body (see e.g., above).

[0040] According to a further embodiment of the method, the method comprises the further step of arranging the housing, the wiring assembly (the plastic body and the plurality of electrical conductors), and the connector assembly with respect to a mold so that the mold that is partially delimited by a surface of the housing comprising the electrical feedthrough. This allows potting of a header body connected to said surface of the housing by means of filling a resin into the mold and curing the resin.

[0041] According to yet another embodiment of the method, the method comprises the further step of forming a header body by filling the mold with a plastic material, particularly an epoxy resin, to connect the header body to the surface via the protrusion(s) serving as an anchor, wherein the connector assembly, the wiring assembly, and the feedthrough pins are embedded in the header body (also termed resin header body).

[0042] Further, with respect to the method according to the invention, reference is also made to the features and embodiments of the implantable medical device according to the invention, wherein said features and embodiments can also be used to further characterize the method according to the present invention.

[0043] In the following, embodiments of the present invention, as well as further features and advantages of the present invention shall be described with reference to the Figures, wherein

[0044] Fig. 1 shows an electrical feedthrough of an embodiment of an implantable medical device according to the present invention,

[0045] Fig. 2 shows an electrical feedthrough of a further embodiment of an implantable medical device according to the present invention,

[0046] 23.084P-WO |04.09. 2025 Fig. 3 shows a housing of an embodiment of an implantable medical device according to the invention, wherein the feedthrough of Fig. 1 is mounted to the housing, and wherein the feedthrough comprises two protrusions, in particular, to connect a plastic body to the housing that carries electrical conductors that shall be connected to the feedthrough pins,

[0047] Fig. 4 shows an exploded view of components of a header of an embodiment of an implantable medical device according to the present invention, wherein the implant comprises the housing and feedthrough shown in Figs. 1 and 3, wherein particularly the plastic body carrying electrical conductors is fastened to the housing via said two opposing protrusions of the flange of the feedthrough,

[0048] Fig. 5 shows a detail of the embodiment shown in Fig. 4,

[0049] Fig. 6 shows a housing of a further embodiment of an implantable medical device according to the invention, wherein the feedthrough of Fig. 1 is modified in that a single protrusion is formed on the flange of the feedthrough,

[0050] Fig. 7 shows an exploded view of a further embodiment of an implantable medical device according to the present invention, wherein here the flange comprises a single protrusion for connecting the plastic body carrying electrical conductors to the housing (before potting of a plastic header body), and

[0051] Fig. 8 shows a detail of the embodiment shown in Fig. 7.

[0052] Fig. 1 shows in conjunction with Figs. 2 and 3 an implantable medical device 1. The device 1 can comprise, inter alia, a hermetically sealed housing 2, an electrical feedthrough 3 and a circuit (not shown) accommodated in an interior space defined by the housing 2. The electrical feedthrough 3 comprises a plurality of feedthrough pins 32 that may be soldered or plugged on an internal end to a circuit arranged in an interior space enclosed by the housing. The feedthrough 3 further comprises a flange 31, and one or more (e.g., ceramic)

[0053] 23.084P-WO |04.09. 2025 electrical insulators 30 being hermetically joined to the flange. The feedthrough pins 32 extend through and are hermetically joined with insulator(s) 30 and are arranged to provide sufficient accessibility for connecting an external end to an external wiring 41 to the pins 32. Particularly, the pins 32 are brazed (e.g., with a gold solder) to the insulator(s) 30, wherein particularly the insulator(s) 30 is in turn brazed (e.g., with a gold solder) to the flange 31. Corresponding to the arrangement of the pins 32, the feedthrough insulator(s) 30 are designed to serve as electrical insulation between the pins 32 and the flange 31. The flange 31 comprises at least one, particularly two, protrusions 33 that serve, on the one hand, as a mechanical interlock between the feedthrough 3 and a plastic header body (e.g., made from an epoxy resin) and, on the other hand, as a receptacle for a plastic body 40 (cf. Figs. 4 and 7) of a wiring assembly 40a in which electrical conductors 41 (e.g. in form of external wiring ribbons) are embedded, e.g. by means of injection molding. The flange 31 may be produced either by metal injection molding or by classical ablative manufacturing processes.

[0054] As shown in the embodiments of Figs. 1 and 2, the feedthrough pins 32 are preferably arranged linearly in a row, i.e., side by side in a first direction D. Further, as indicated in Fig. 1, the flange 31 may comprise a plateau 35 that can be used as a suction surface for a vacuum gripper in an SMD process. According to Fig. 2, a ground pin 320 may be provided that sits offset from the feedthrough pins 32 and is soldered directly to the flange 31.

[0055] Furthermore, the feedthrough 3 shown in Fig. 1 and 3 may be used in conjunction with the components 40a, 50 shown in Figs. 4 and 5. According thereto, the flange 31 of the feedthrough 3 may comprise two opposing protrusions 33 that may form slider geometries, that - on the one hand - provide a mechanical anchorage between the feedthrough 3 and a plastic header body and - on the other hand - form a receptacle for the plastic body 40 of the wiring assembly 40a that holds electrical conductors 41, particularly in the form of external wiring ribbons 41, which may be overmolded in the plastic body 40. The electrical conductors 41 are held in a manner by the plastic body 40 so that the electrical conductors 41 may contact the feedthrough pins 32 on their external end and may further contact electrical contacts 52 of connectors 51 of a connector assembly 50 on the other end, which connector assembly 50 may in turn be fixed to the plastic body 40. In this way, the connectors 51 (e.g., for receiving electrode lead plugs) of the connector assembly 50 may be electrically

[0056] 23.084P-WO |04.09. 2025 connected via the electrical contacts 52 of the connector assembly 50, the electrical conductors 41 and the feedthrough pins 32 to the circuit accommodated by the housing 2 of the implantable medical device 1.

[0057] The plastic body 40 of the wiring assembly 40a comprises two connecting members 42 that are configured to engage with the protrusions 33 to fix the plastic body 40 to the flange 31 of the feedthrough 3. Particularly, the protrusions 33 are formed such on the flange 31 that the insulators 30 are arranged between the opposing protrusions 33. Furthermore, for engaging with the protrusions 33, the respective protrusion 33 is configured to guide the associated connecting member 42 in a mounting direction M running orthogonal to said first direction D. Particularly, for guiding the respective connecting member 42, the associated protrusion 33 comprises a guiding portion 33b extending along the mounting direction M and configured to slide in a groove 42a of the connecting member 42 upon engagement of the connecting member 42 with the protrusion 33. Furthermore, for securing the respective connecting member 42 on the respective protrusion 33, the respective connecting member 42 comprises a latching lug 43 that engages behind an edge 33a of the respective protrusion 33.

[0058] Furthermore, while the plastic body 40 may be fixed with respect to the flange 31 by means of the protrusions 33, the connector assembly 50 may be fixed with respect to the flange 31 / housing 2 by engaging with a fixation member 45 of the plastic body 40. As indicated in Fig. 4, the fixation member 45 may be configured to be inserted into a corresponding recess of the connector assembly 50.

[0059] According to a further embodiment shown in Figs. 7 and 8, the flange 31 may comprise a single protrusion 330 that may be arranged between the two opposing insulators 30 with respect to the first direction D. The protrusion 330 comprises a receiving hole 331, particularly a through-hole 331, that serves, on the one hand, as a mechanical anchorage between the feedthrough 3 and an adjacent resin header body and, on the other hand, as a receptacle for holding the plastic body 40 which in turn holds the electrical conductors 41 being overmolded in plastic body 40.

[0060] 23.084P-WO |04.09. 2025 Particularly, for engaging with the protrusion 330, the connecting member 42 is configured to slide along the protrusion 330 by being inserted with an insertion portion 42b of the connecting member 42 (particularly in form of a cylindrical pin 42b) into the hole 331 in the mounting direction M. Furthermore, in order to secure the connecting member 42 to the protrusion 330 the connecting member 42 comprises two latching lugs 43, 44 on either side of the insertion portion 42b, wherein each lug 43, 44 is configured to engage behind an edge 330a, 330b of the protrusion 330.

[0061] The connector assembly 50 in turn is fixed to the flange 31 / housing 2 via a fixation member 45 of the plastic body 40 that can encompass at least a portion of the insert 50.

[0062] As already stated above, the connector assembly 50 comprises one or more connectors 51 configured to receive a plug of an electrode lead. For example, the connector assembly 50 may comprise one or two IS-l / DF-1 connectors 51, as shown Figs. 4 (one IS-l / DF-1 connector 51) and 7 (two IS-l / DF-1 connectors 51). Additionally or alternatively, the connector assembly 50 may comprise one or two IS-4 / DF-4 connectors 51, as shown in Figs. 4 (two IS-4 / DF-4 connectors) and 7 (one IS-4 / DF-4 connector). Furthermore, the connector assembly 50 may comprise both one or two IS-l / DF-1 connectors 51 and one or two IS- 4 / DF-4 connectors 51.

[0063] The above-described embodiments (Figs. 4 and 5 as well as Figs. 7 and 8) allow efficient connecting of the electrical conductors 41 to the feedthrough pins 32 due to the fact that the electrical conductors 41 are configured to mechanically contact the pins 32 when the plastic body 40 is connected to the flange 31 as described above in conjunction with Figs. 4 and 5 and Figs. 7 and 8. On the other hand, when the connector assembly 50 is aligned and / or fixed to the housing 2 / feedthrough 3 via the plastic body 40, the electrical conductors 41 also contact the electrical contacts 52 of an connector 51 of the connector assembly 50 that provide an electrical connection to the connectors 51 that may be sockets for receiving electrode lead plugs.

[0064] Particularly, as shown in Figs. 4 and 7, the elastic body 40 may comprise opposing struts 420 extending along one another, wherein sections of the electrical conductors 41 may

[0065] 23.084P-WO |04.09. 2025 extend between these struts 420 and may contact annular (e.g., of an IS-4 / DF-4 connector) or flat (e.g., of an IS-l / DF-1 connector) electrical contacts 52 provided on connectors 51 of the connector assembly 50.

[0066] Particularly, in the embodiments described above, electrical connections may be made by laser welding the electrical conductors 41 to the feedthrough pins 32 and to the electrical contacts 52 provided on a connector 51 of the connector assembly 50. Alternatively, the electrical connections between the electrical conductors 41 and the feedthrough pins 32 may be made by resistance welding.

[0067] Thus, prior to the step of potting a plastic header body, particularly made from an epoxy resin, to embed the plastic body 40, insert 50, electrical conductors 41 and feedthrough pins 32 therein, all electrical connections may be made in an efficient manner.

[0068] Due to the fact that the plastic body 40 is connected to the protrusions 33, 330, forming the header resin body around the plastic body 40 also anchors the resin header body to be formed (not shown in Figs. 4 and 7) to the flange 3 / housing 2.

[0069] The present invention offers the advantage of an accessibility of the feed-through pins that enables automated external wiring. This paves the way to fully automated production of active implants, which will save costs and increase quality in the long term. By integrating the mechanical anchoring between the feedthrough and the resin header into the flange design, the process of anchor welding can be completely eliminated. This saves both costs and resources.

[0070] 23.084P-WO |04.09. 2025

Claims

Claims1. An implantable medical device (1), comprising:- a housing (2),- an electrical feedthrough (3) arranged on the housing (2), wherein the electrical feedthrough (3) comprises a first electrical insulator (30), a flange (31) connected to the first insulator (30) and a first plurality of feedthrough pins (32) extending through the electrical insulator (30) and being arranged in a single row along a first direction (D),- a wiring assembly (40a) comprising a plastic body (40) and a plurality of electrical conductors (41) being supported by the plastic body (40), wherein each of the first plurality of feedthrough pins (32) is connected to an electrical conductor (41) of the plurality of electrical conductors (41), and- a protrusion (33, 330) protruding from the flange (31), wherein the plastic body (40) comprises a connecting member (42) that engages with the protrusion (33) to connect the plastic body to the flange (31).

2. The implantable medical device according to claim 1, wherein for engaging with the protrusion (33), the protrusion (33) is configured to guide the connecting member (42) in a mounting direction (M) running orthogonal to said first direction (D).

3. The implantable medical device according to claim 2, wherein the protrusion (33) comprises a guiding portion (33b) extending along the mounting direction (M) and configured to slide in a groove (42a) of the connecting member (42).

4. The implantable medical device according to claim 1 or 2, wherein the protrusion (330) comprises a hole (331), and wherein for engaging with the protrusion (330) the connecting member (42) is configured to slide along the protrusion (330) by being inserted with an insertion portion (42b) of the connecting member (42) into the hole (331) in the mounting direction (M).23.084P-WO |04.

09. 20255. The implantable medical device according to one of the claims 1 to 4, wherein the connecting member (42) comprises a first latching lug (43) configured to engage behind an edge (33a, 330a) of the protrusion (33, 330) to secure the connecting member (42) on the protrusion (33, 330).

6. The implantable medical device according to claim 5, wherein the connecting member (42) comprises a second latching lug (44) arranged opposite the first latching lug (43) so that the insertion portion (42b) is arranged between the first latching lug (43) and the second latching lug (44).

7. The implantable medical device according to one of the preceding claims, wherein the electrical feedthrough (3) comprises a second electrical insulator (30) arranged adjacent the first electrical insulator (30) in the first direction (D), wherein a second plurality of feedthrough pins (32) of the electrical feedthrough (3) extend through the further electrical insulator (30) and are arranged in a single row along the first direction (D), and each of the second plurality of feedthrough pins (32) is connected to an electrical conductor of the plurality of electrical conductors (41) of the wiring assembly (40a),8. The implantable medical device according to claim 7, wherein the protrusion (330) is arranged between the first electrical insulator (30) and the second electrical insulator (30) with respect to the first direction (D).

9. The implantable medical device according to one of the preceding claims, wherein the implantable medical device (1) comprises a connector assembly(50), the connector assembly (50) comprising at least one connector (51), particularly for receiving a plug of an electrode lead, the connector (51) being electrically connected to at least one feedthrough pin (32) via an electrical conductor of said plurality of electrical conductors (41).23.084P-WO |04.

09. 2025- 15 -10. The implantable medical device according to claim 9, wherein the plastic body (40) comprises a fixation (45) member for fixing a position of the connector assembly (50) with respect to the housing (2).

11. The implantable medical device according to claim 10, wherein the fixation member (45) is inserted into a recess of the connector assembly (50), or wherein the fixation member (45) is configured to at least partially encompass a portion of the connector assembly (50).

12. The implantable medical device according to one of the preceding claims, wherein wiring assembly (40a) and the connector assembly (50) are embedded in a header body.

13. The implantable medical device according to one of the preceding claims, wherein the header body is anchored to the flange (31) via the at least one protrusion (33, 330).

14. The implantable medical device according to one of the preceding claims, wherein the header body is formed out of a plastic material, particularly an epoxy resin.

15. A method for assembling an implantable medical device, particularly according to one of the preceding claims, comprising the steps of providing a housing (2) of an implantable medical device (1), the housing (2) comprising an electrical feedthrough (3) arranged on the housing (2), wherein the electrical feedthrough (3) comprises a first electrical insulator (30), a flange (31) connected to the insulator (30), the feedthrough pins (32) extending through the first electrical insulator (30) and being arranged in a single row along a first direction (D), and at least one protrusion (33), connecting a wiring assembly (40a) comprising a plastic body (40) and a plurality of electrical conductors (41) being supported by the plastic body (40) by engaging a connecting member (42) of the plastic body (40) with the protrusion (33), and electrically connecting each of the first plurality of feedthrough pins (32) to an electrical conductor of the plurality of the electrical conductors (41).23.084P-WO |04.

09. 2025

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