METHOD FOR BUILDING PERIODIC MICROSTRUCTURES AROUND HTSC FILMS POSSESSING JOSEPHSON PROPERTIES Russian patent published in 2006 - IPC H01L39/22 

FIELD: building two-dimensional periodic microstructures around high-temperature superconductor films.

SUBSTANCE: proposed method intended for producing loose couplings in the form of two-dimensional periodic microstructures possessing Josephson properties used in high-sensitivity systems of HTSC film SQUID-magnetometers, for instance to produce high-sensitivity magnetic-flux sensors and electric-field detectors for magnetocardiogram recording units in medicine, geophysics, environment control, in oil industry to check oil products for paramagnetic impurities, and the like involves building of periodic microstructures around HTSC films possessing Josephson properties. To this end high-temperature superconductor is applied to substrate and loose-coup[ling regions are formed thereon in the course of HTSC film evaporation at the same time organizing rarefaction and compression regions within substrate to produce impact on film growth process. Periodic rarefaction and compression regions can be organized in substrate by laser-beam ultrasonic pulse, for instance that of nanosecond length, that excites acoustic standing wave of about 45 - 90 μm in length; in the process opposite side of substrate is acted upon by ultrasonic pulse. Provision is made to prevent parasitic loose couplings with critical currents lower than that of bridges in compression region of superconducting components and for dispensing with large units whose substructure has disoriented crystals forming Josephson structures of Dyem bridge type at crystal-to-crystal interface or on embedded microscopic particles of non-superconducting phase YBaCuO.

EFFECT: facilitated manufacture, enhanced operating stability of mentioned components, enhanced reliability and reproducibility of their characteristics.

6 cl, 7 dwg