Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1988-04-14
1989-10-17
Morgenstern, Norman
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
427 42, 427 531, 427 62, 427 39, B05D 306, B05D 512
Patent
active
048747416
ABSTRACT:
The present invention relates to a method of directly forming a thin, orientated layer, or film, of superconducting materials, suitably mixtures of Pervoskite-type superconducting oxides, on a support base, or substrate, by depositing the layer, or film, in an ionized oxygen atmosphere using a laser beam means. The present process is carried out at temperatures sufficiently high that the film adheres to the substrate, but sufficiently low that a superconducting layer is directly deposited the substrate. Preferably the process is carried out at a temperature less than about 450 degrees C. Temperatures as low as 400 degrees C. have been found useful.
REFERENCES:
Deposition of High Tc Superconductor Thin Films by Pulsed Laser Ablation; D. N. Mashburn et al.; Mat. Res. Soc. Symp. Proc., vol. 99.
High-Temperature Superconducting Y-Ba-Cu-O Thin Film by Using Ionized Cluster Beam Method; K. Yamanishi et al.; Mat. Res. Soc. Symp. Proc., vol. 99.
Formation and Processing of High Tc Superconductor Films with Pulsed Excimer Laser; Tomoji Kawai et al., Mat. Res. Soc. Symp. Proc., vol. 99.
Interface Effects of Laser Ablated and Sputtered High Tc Superconducting Thin Films; B. Dam et al., Mat. Res. Soc. Symp. Proc., vol. 99.
Laser Induced Deposition of YBa.sub.2 Cu.sub.3 O.sub.7-x Thin Films; H. S. Kwok et al., Mat. Res. Soc. Symp. Proc., vol. 99.
Superconducting Thin Films of (RE)Ba.sub.2 Cu.sub.3 (Ag)O.sub.7-x Prepared by Pulsed Laser Ablation; L. Lynds et al., Mat. Res. Soc. Symp. Proc., vol. 99.
Laser Deposited High Tc Superconducting Thin Films; T. Venkatesan; Solid State Technology/Dec. 1987.
Formation of Thin Superconducting Films by the Laser Processing Method; J. Narayan et al., Appl. Phys. Lett., vol. 51, No. 22, Nov. 1987.
Preparation of Y-Ba-Cu Oxide Superconductor Thin Films Using Pulsed Laser Evaporation from High Tc Bulk Material; D. Dijkkamp et al., Appl. Phys. Lett., vol. 51, No. 8,24, Aug. 1987.
Kwok Hoi-Sing
Shaw David T.
Witanachchi Sarath
Bueker Margaret
Dunn Michael L.
Morgenstern Norman
The Research Foundation of State University of New York
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