Patent ID: 6172009
Filing Date: 2001-01-09
Classification: H01L,Y10S

Abstract:
A method for preparing a rare earth-barium-copper oxide superconductor film, comprising:providing a metal oxyfluoride film on a substrate, said metal oxyfluoride film having a thickness greater than or equal to about 0.5 .mu.m and comprising the constituent metallic elements of a rare earth-barium-copper oxide superconductor in substantially stoichiometric proportions; andconverting the metal oxyfluoride into the oxide superconductor at a rate of conversion selected by adjusting a reaction parameter selected from the group consisting of temperature, P.sub.H2O and combinations thereof, such that an oxide superconductor film having a transport critical current density of greater than or equal to about 10.sup.5 A/cm.sup.2 at 77 K, zero field is obtained.