Method of producing high-temperature superconductor thin film de

Details Method of producing high-temperature superconductor thin film de Method of producing high-temperature superconductor thin film de

1996-09-11

1998-12-08

Arbes, Carl J.

Metal working

Method of mechanical manufacture

Watch or clock making

505725, H05K 302

Patent

active

058453954

ABSTRACT:
A high-temperature superconductor (HTS) thin film device such as a patch antenna or a microstrip line is produced by using a substrate of a low-permittivity material such as polytetrafluoroethylene in which fine particles of glass fiber are dispersed. Initially a HTS film is deposited on a conventional MgO or SrTiO.sub.3 substrate by sputtering or laser ablation. The low-permittivity substrate is bonded to the HTS film on the oxide substrate with an adhesive, and then the oxide substrate is removed by grinding or abrasion. After that the HTS film on the low-permittivity substrate is patterned. Since the low-permittivity substrate is small in the degree of wavelength shortening, current density in the HTS film reduces and therefore power loss of the device decreases.

REFERENCES:
patent: 4956335 (1990-09-01), Agostinelli et al.
patent: 5326747 (1994-07-01), Inada et al.
patent: 5672569 (1997-09-01), Nakamura et al.
K. Suzuki; "Recent Progress of High-Tc Superconductive Microwave Devices"; Technical Report of IEICE, Apr. 1995, pp. 1-6.
H. Chaloupka et al.; "Miniaturized High-Temperature Superconductor Microstrip Patch Antenna"; IEEE Transactions on Microwave Theory and Techniques, vol. 39, No. 9, Sep. 1991, pp. 1513-1521.
Research Disclosure 338110, Jun. 10, 1992.

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