Process for the preparation of a shaped substrate for a coated conductor and coated conductor using said substrate

Process for preparing a shaped substrate with curved surface suitable in the production of coated conductors comprising the steps of:

• providing a textured substrate with planar surface with one or more textured buffer layer(s);
• subjecting the substrate covered with the initial buffer layer(s) to a shaping step, wherein in the shaping step the planar surface is deformed to a curved surface;
• and
• providing a textured additional buffer layer onto the initial buffer layer(s) by epitaxial growth.