Glass film with specially formed edge, method for producing same, and use thereof

A method for producing a glass film having at least one stepped longitudinal edge, comprising the steps of:

• drawing a glass film having a heated portion with a viscosity of less than 109 dPa·s so that a drawn glass film is thinner than the glass film;
• and
• heating the drawn glass film, via a laser, at least at one additional point, the at least one additional point being located in an edge region of the drawn glass film, wherein the drawn glass film has a viscosity at a site of laser focus of not more than 109 dPa·s before the laser is switched on and wherein the heating is sufficient to form a notch at the at least one additional point, the notch being parallel to a drawing direction,
• wherein the notch has a convex curvature at a shoulder defined at a quality portion of the drawn glass film to a wall region of the notch and has a concave curvature defined at a transition from the wall region to a bottom of the notch.