Process for the preparation of a shaped substrate for a coated conductor

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

• first providing a textured substrate with planar surface and an initial texture with one or more first textured buffer layer(s), said first textured buffer layer(s) adopting said initial texture of the substrate;
• subjecting the substrate, covered with the first initial buffer layer(s), to a shaping step, wherein, in the shaping step, the planar surface of said substrate is deformed to a curved surface wherein the substrate is shaped to have any one of a round, an elliptical or a polygonal cross sectional area;
• and
• after shaping said substrate, providing a second additional buffer layer onto the first buffer layer(s) by epitaxial growth, wherein said second buffer layer obtains said initial texture of said substrate.