Patent ID: 7625843

Claim:
A method of preparing a precursor solution for depositing an organic metal using a superconducting oxide comprising: a) dissolving a superconducting raw material powder comprises REBa 2 Cu 3 O 7-x , wherein in RE is at least one rare earth element, in a TFA solution and then heating the resultant solution; b) applying the solution onto a substrate; c) elevating the substrate temperature to evaporate the solution if the powder is completely dissolved and the solution becomes clear, and continuously heating the solution until it is in the form of a compound in a viscous jelly state; d) stop heating the TFA acid aqueous solution when the solution loses fluidity completely and cooling the solution; and e) dissolving the REBa 2 Cu 3 O 7-x compound in the jelly state, hardened at a room temperature, in an organic solvent, to provide a superconducting raw material powder-TFA precursor solution.