The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 26, 2003
Filed:
May. 30, 2002
John A. Smith, Nashua, NH (US);
Michael I. Cima, Winchester, MA (US);
Neville Sonnenberg, Newton, MA (US);
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
An oxide superconductor article is provided having an oxide superconductor film having a thickness of greater than 0.5 microns disposed on a substrate, said article having a transport critical current density (J ) of greater than or equal to about 10 A/cm at 77K, zero field. The oxide superconductor film is characterized by high J and high volume percent of c-axis epitaxial oxide grains, even with thicknesses of up to 1 micron. The oxide superconductor article is prepared by providing a metal oxyfluoride film, said metal oxyfluoride film comprising the constituent metallic elements of an oxide superconductor in substantially stoichiometric proportions; and converting 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 , P , and time and combinations thereof, such that an oxide superconductor film having a transport critical current density of greater than or equal to about 10 A/cm at 77K, zero field is obtained.