The present invention relates to a thin film (301) for a lead (300), especially for a lead (300) for brain applications, preferably for a lead (300) for a neurostimulation and/or neurorecording system, whereby the thin film (301) comprises a proximal end (310) and a distal end (304), whereby the thin film (301) further comprises at least one extension means (320) at the distal end (304). Furthermore, the present invention relates to a lead, a probe and a neurostimulation and/or neurorecording system.