The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 31, 1991
Filed:
Sep. 11, 1989
Kazumasa Takagi, Tokyo, JP;
Tokuumi Fukazawa, Tachikawa, JP;
Yoshimi Kawanami, Fuchu, JP;
Yuuichi Madokoro, Kokubunji, JP;
Katsuki Miyauchi, Hino, JP;
Toshiyuki Aida, Chofu, JP;
Yukio Honda, Fuchu, JP;
Masaaki Futamoto, Kanagawa, JP;
Masahiko Hiratani, Akishima, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A weak-link Josephson junction is of the type employing a thin film of an oxide superconductor, in which a crystal grain boundary produced reflecting an artificial crystal defect is utilized as the weak-link junction. The crystal grain boundary is formed concretely by a method in which atoms of different species are deposited on the predetermined part of the surface of a substrate, the predetermined part of the surface of a substrate is disturbed, or parts of different crystal face orientations are formed at the surface of a substrate, whereupon the superconducting thin film is epitaxially grown on the substrate, or by a method in which the predetermined part of the superconducting thin film, epitaxially grown on a substrate, is diffused with atoms of different species hampering a superconductivity, or the predetermined part of the superconducting thin film is disturbed, whereupon the superconducting thin film is annealed.