PRINTED CIRCUIT BOARD CONNECTION TO FEEDTHROUGH
An implantable electronic device includes a housing wall defining an interior surface and an exterior surface. A feedthrough assembly includes a body coupled to the housing and defining an aperture, and a pin at least partially disposed within the aperture and passing through the housing wall from the interior surface to the exterior surface such that the pin has an interior portion and an exterior portion. A printed circuit board (PCB) has a substantially rigid portion defining a plane and a substantially flexible portion. The flexible portion has a distal end and a proximal end. The proximal end is coupled to the substantially rigid portion. The flexible portion is coupled to the pin interior portion adjacent the distal end. The flexible portion defines a bend between the proximal end and the distal end. At least one line tangent to the flexible portion is substantially perpendicular to the plane.
1 . An implantable electronic device, comprising:
a housing having a wall including an interior surface and an exterior surface;
a feedthrough assembly including a body coupled to the housing and defining an aperture, and a pin at least partially disposed within the aperture and passing through the housing wall from the interior surface to the exterior surface such that the pin has an interior portion and an exterior portion;
a printed circuit board (PCB) having a substantially rigid portion defining a plane and a substantially flexible portion, the flexible portion having a distal end and a proximal end, the proximal end coupled to the substantially rigid portion, the flexible portion coupled to the pin interior portion adjacent the distal end, the flexible portion defining a bend between the proximal end and the distal end, with at least one line tangent to the flexible portion being substantially perpendicular to the plane.
2 . The implantable electronic device of claim 1 , wherein the flexible portion is coupled to the pin with a soldered joint.
3 . The implantable electronic device of claim 1 , wherein the soldered joint defines a standoff distance from the feedthrough body.
4 . The implantable electronic device of claim 1 , wherein the flexible portion comprises an electrically conductive element sandwiched between a first insulating layer and a second insulating layer.
5 . The implantable electronic device of claim 4 , wherein the conductive element is continuous with a conductor of the rigid portion.
6 . The implantable electronic device of claim 4 , wherein the conductive element defines an aperture for engaging the pin interior portion.
7 . The implantable electronic device of claim 1 , wherein the feedthrough body is welded to the housing.
8 . The implantable electronic device of claim 1 , wherein the feedthrough body is welded to the housing exterior surface.
9 . The implantable electronic device of claim 1 , wherein the feedthrough includes a capacitive filter disposed annularly about the feedthrough pin.
10 . The implantable electronic device of claim 1 , wherein the flexible portion defines a substantially U-shaped bend.
11 . The implantable electronic device of claim 10 , wherein the proximal end and the distal end are substantially parallel.
12 . The implantable electronic device of claim 10 , wherein the pin defines a pin axis that is substantially perpendicular to the PCB.
13 . The implantable electronic device of claim 10 , wherein the flexible portion includes a conductive layer disposed along a neutral strain axis of the bend.
14 . The implantable electronic device of claim 13 , wherein the conductive layer is sandwiched between a first insulating layer and a second insulating layer.
15 . A method of assembling an implantable electronic device, the method comprising:
providing a housing having an interior surface and an exterior surface;
providing a feedthrough assembly including a body defining an aperture, and a pin at least partially disposed within the aperture and passing through body;
coupling the feedthrough assembly to the housing, the pin extending through the housing to define an interior portion and an exterior portion;
providing a printed circuit board (PCB) having a substantially rigid portion defining a plane and a substantially flexible portion, a proximal end of the flexible portion coupled to the rigid portion;
coupling a distal end of the flexible portion to the interior portion of the pin;
rotating the rigid portion about an axis substantially perpendicular to the pin; and
forming a bend between the proximal end and the distal end, with at least one line tangent to the flexible portion being substantially perpendicular to the plane.
16 . The method of claim 15 , wherein the act of coupling the feedthrough assembly to the housing includes welding the feedthrough body to an exterior surface of the housing.
17 . The method of claim 15 , wherein the act of forming a bend includes forming a U-shaped bend.
18 . The method of claim 17 , wherein the act of forming a bend results in the proximal end and the distal end being substantially parallel.
19 . The method of claim 15 , further comprising engaging an aperture of the flexible portion with the pin, such that the pin is received within the aperture.
20 . The method of claim 19 , further comprising soldering the flexible portion to the pin.