Patent ID: 7618923
Filing Date: 2009-11-17
Classification: H01L,Y10T

Abstract:
1. A method for making a long superconductor, e.g. a tape or wire, by depositing at least one polycrystalline superconducting compound onto a metallic substrate or onto a buffer layer system on said substrate, characterized by the following steps fabricating said metallic substrate or said buffer layer system to consist of or to contain at least on its surface a microstructure of longitudinally oriented, long grains with a high aspect ratio, a=L treating said surface of said metallic substrate or top of said buffer layer to form grooves in a direction of current flow, and epitaxially growing said superconducting compound on said substrate or on a top layer of said buffer layer system to produce a percolation path of long superconducting grains being aligned longitudinally and exhibiting a high aspect ratio such that their projection, being characterized by a length L