Fabrication of patterned lines of high T.sub.c superconductors

Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k

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505737, 505742, 427 431, 427 531, 427 62, 427 63, 427226, 427314, B05D 512, B05D 302, B05D 306

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049978098

ABSTRACT:
A method for producing a patterned layer of high T.sub.c oxide superconductor is provided in which patterning is accomplished prior to the attainment of a superconducting state in the layer. A solution containing precursor components of the desired oxide superconductor is sprayed onto a substrate and dried to provide a layer thereon. This layer is then irradiated in selected areas to convert the irradiated layers to an intermediate oxide state, the nonirradiated areas being unchanged. The nonirradiated areas are then dissolved away, leaving a pattern of oxide material. This oxide material is then converted to a high T.sub.c superconducting state, as by annealing in an oxygen atmosphere. This provides the patterned layer of high T.sub.c oxide superconductor. An example of a such a superconductor is a mixed copper oxide, such as Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.7-x.

REFERENCES:
patent: 3801366 (1974-04-01), Lemelson
patent: 4395436 (1983-07-01), Bianchi et al.
Kawai et al., Jap. J. of App. Phys., vol. 26, No. 10, Oct. 1987, pp. L1740-L1742.

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