Very thin films of a superconducting material are applied to a metal strip in a continuous process by a technique called chemical solution deposition. This process involves coating the tape with a thin layer of a solution using a special printing head. The applied solution then dries to form a film.
In contrast to other, physical methods, the chemical process requires neither a vacuum nor a clean room environment. This provides a decisive advantage for the production costs of the superconducting wires.