Method of fabricating a superconductive flexible ceramic conductor having a high critical temperature

A method of fabricating a superconductive flexible conductor having a high Tc comprising the steps of applying a deposit of a superconductive ceramic of a thickness of 50 .mu.m to 300 .mu.m and of a concentration by volume of not less than 70% to a metal tape of a thickness lying in the range of 0.1 mm to 1 mm,

• passing a central zone of said deposit having a width of less than 10 mm relative to a tape travel direction, through an infrared laser beam having a diameter less than said width of said deposit at a speed of not less than 5 cm per minute and causing a surface temperature to be heated to not less than 1200.degree. C., thereby imparting to said deposit at said zone, a surface superconductive layer of a concentration by volume close to 100%, which is textured in the metal tape travel direction, and which is of a thickness lying in the range of 10 .mu.m to 100 .mu.m, which thickness is less than that of said deposit and
• annealing under oxygen said metal tape provided with said deposit and including said surface superconductive layer.