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. 22, 1978
Filed:
Feb. 20, 1976
Herbert Henkler, Ludwigshafen, DE;
Hermann Deichelmann, Ludwigshafen, DE;
Roland Koenig, Ludwigshafen, DE;
Volker Koch, Ludwigshafen, DE;
Bernd Roeger, Limburgerhof, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A magnetic thin film storage device of simplified design working on the shift register principle and comprising a flat support to which a ferromagnetic layer has been applied, which layer contains regions of different coercivity, lower-coercivity regions being surrounded by regions of higher coercivity, and also comprising electric conductors extending in planes which are parallel to the support, the conductors serving to produce the magnetic fields required to propagate magnetic domains into the lower-coercivity regions, at least one group of channels being provided which terminate in the same enlarged lower-coercivity area, and the magnetic domains contained in the channels terminating in the said enlarged area being propagated individually and consecutively into that enlarged area. The components of thin-film storage devices of this type can be easily brought into register with the aid of mechanical stops or similar devices and their production can thus be largely automated; besides, the risk of random errors occurring in the flow of data can be substantially reduced, owing to the particularly simple geometric shape of the channels.