Processes for producing a sleeve for an electrode for medical applications

A method of producing a sleeve for a ring electrode for electrophysiological and neuro-medical applications from a metallic tape, wherein the tape and the sleeve fabricated from the tape consist of a biocompatible metal or a biocompatible metallic compound, the method comprising:

• punching into the tape to define repetitive structures, wherein the repetitive structures each comprise at least one surface that is connected by at least one fin to at least one external strip, wherein at least the at least one external strip connects the repetitive structures to each other on a margin;
• subsequently forming a sleeve mold from a multiple of the at least one surfaces of the repetitive structures through multiple reforming steps by deep-drawing;
• and
• punching off the sleeve mold such that the sleeve is formed comprising a first tube-shaped region with a larger diameter and a second tube-shaped region with a smaller diameter, wherein the first region with the larger diameter comprises a larger external diameter and internal diameter than the second region with the smaller diameter, and the two regions are connected to each other such that the sleeve forms a continuous tube characterized in that the second region with the smaller diameter has a circumferential flange formed in it for attaching a coil or a wire by welding, wherein the external diameter of the flange is at least 0.1 mm larger than the external diameter of the second region.