A new technique has been developed to remove flux quanta trapped in superconducting film. In 1984, one of the present authors proposed a micro heat flushing (μHF) method for achieving perfect magnetic shielding. In this method, a small area on a superconducting thin film is heated and turned into the normal state. The entire film surface is then swept over by the normal hot spot, which captures the trapped flux and carries it either to an unimportant region or out of the superconductor. It has been shown that the trapped flux movement follows the motion of the Ar laser beam exactly. By scanning the laser beam over the trapped flux quanta, the trapped flux is successfully moved to any desired location.
