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:
Aug. 16, 1988
Filed:
Dec. 12, 1985
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
The superconducting memory device comprises a thin type-II superconductor film for storing an Abrikosov vortex, a write control line for generating the vortex in the superconductor film, and a vortex detector for detecting a polarity of the vortex stored in the film. The vortex detector includes a Josephson junction and a read control current line. The Josephson junction comprises a base electrode, a counter electrode and a tunnel barrier region sandwiched between the base electrode and the counter electrode. By utilizing a fact that a shift direction of the threshold characteristics of the vortex detector corresponds to the polarity of the vortex stored in the superconductor film, a flux crossing the tunnel barrier region of the Josephson junction due to the stored vortex is detected by the read control line.