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 hollow-cylindrical inner lining having an inner lining length which corresponds to a multiple of a lead length of the lead for the medical device;
• b) providing a plurality of electrically conductive channels, wherein each of the channels is formed by at least one insulated conductor comprising an electrical conductor and an insulating layer;
• c) spirally winding the electrically conductive channels around the inner lining to provide an uninsulated cable having a cable length which corresponds to a multiple of the lead length;
• d) cutting the uninsulated cable to a length which corresponds to the lead length, to provide an uninsulated lead cable;
• e) sheathing the uninsulated lead cable with a shrink tube;
• f) heating the shrink tube to provide an insulated lead cable having the shrunk shrink tube as an outer insulation;
• g) providing a plurality of electrodes;
• h) creating a plurality of contact openings near a distal end of the insulated lead cable, wherein, in order to create a contact opening, parts of the outer insulation 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 contacted via each of the contact openings;
• i) electrically contacting the plurality of electrodes with the plurality of electrically conductive channels via the plurality of contact openings, wherein each of the electrodes is selectively electrically connected to at least one of the electrically conductive channels via one of the contact openings.