Patent ID: 8389045
Filing Date: 2013-03-05
Classification: C23C,H01L,Y10T

Abstract:
1. A method for producing an oxide superconductor, comprising: mixing a methanol solution comprising fluorocarboxylate salts of metal M, barium, and copper at an atomic ratio of metal M:Ba:Cu of approximately 1:2:3 with an organic substance having a ratio of fluorine/(fluorine and hydrogen) of 75 mol % or more to form a coating solution; coating the coating solution on a substrate to form a gel film; and calcining, firing and oxygen-annealing the gel film to form a film of an oxide superconductor, wherein metal M is selected from the group consisting of yttrium and a lanthanoid metal, provided that cerium, praseodymium, and promethium are excluded, and wherein the organic substance contains a fluorocarboxylic acid group, in which at least one hydrogen atom is bonded to an organic chain of the fluorocarboxylic acid group.