Method for producing a bi- or multipolar lead

A method for producing a bi- or multipolar lead for a medical device, comprising the method steps of:

• a) providing a cable, comprising
• an outer insulation,
• an inner lumen, wherein the inner lumen is arranged coaxially with respect to the outer insulation and extends in a longitudinal direction from a proximal end to a distal end of the cable, and
• at least one electrically conductive channel, wherein the at least one electrically conductive channel is arranged between the outer insulation and the inner lumen of the cable, and, wherein the at least one electrically conductive channel is formed by at least one insulated conductor which comprises an electrical conductor and an insulating layer;
• b) providing at least one conductive paste;
• c) creating at least one contact opening in the proximity of the distal end of the cable, wherein, in order to create the contact opening, parts of the outer insulation are removed and parts of the insulating layer of at least one of the electrically conductive channels are removed so that the at least one electrically conductive channel can be selectively electrically contacted via the contact opening, wherein the contact opening comprises a contact opening cross-sectional area;
• d) filling the contact opening with the conductive paste, wherein a filled conductive paste volume of the conductive paste comprises 105% to 200% of a capacity volume of the contact opening in order to create a projection of the conductive paste protruding from the contact opening;
• e) providing at least one electrode, wherein the electrode comprises a contact surface with a contact cross-sectional area, wherein the contact cross-sectional area is larger than the contact opening cross-sectional area;
• f) positioning the electrode at the position of the contact opening, wherein the contact surface is oriented in the direction of the contact opening;
• g) moving the positioned electrode in the direction of the contact opening so that the projection of the conductive paste is introduced during the movement between the outer insulation and a part of the contact surface which projects beyond the contact opening;
• h) curing the conductive paste to fix the electrode in an electrically conductive manner to the electrically conductive channel.