Electrical interconnection system between an intrinsically extensible conductor and a not intrinsically extensible one

An implantable system of electrical interconnection between an intrinsically extensible conductor and a not intrinsically extensible one, or between two extensible conductors, comprising:

• an interconnection board comprising a rigid or flexible non-extensible planar substrate, on a first functionalized face of which is present at least one conductive track, each in electrical contact, at one end thereof, with at least one conductor external to the system, which may be rigid, elastic, or in its turn extensible;
• an elastic and extensible substrate on a second functionalized face of which is present at least one extensible conductive structure, wherein the elastic and extensible substrate and the at least one extensible conductive structure are extensible in a plane parallel to the first and second functionalized faces;
• and
• at least one deposit of an adhesive, elastic, and electrically insulating material, interposed between said interconnection board and said elastic and extensible substrate, which adheres to said first and second functionalized faces at least in part of their zones free from said at least one conductive track and said at least one extensible conductive structure, establishing adhesion between said interconnection board and said elastic and extensible substrate while allowing relative motion thereof and ensuring electrical contact between said at least one conductive track and said at least one extensible conductive structure upon the relative motion.