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:
May. 27, 1980
Filed:
Mar. 16, 1978
Herbert Henkler, Battenberg, DE;
Roland Koenig, Ludwigshafen, DE;
Hermann Deichelmann, Ludwigshafen, DE;
Volker Koch, Ludwigshafen, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A magnetic domain storage device comprising a ferromagnetic, polycrystalline metal layer which is applied to a support and comprises areas of different coercivity, the areas of lower coercivity in the form of strip-shaped channels being surrounded by areas of higher coercivity; a system of electrical conductors, extending in planes arranged parallel and in close vicinity to the ferromagnetic layer for creating, propagating and detecting magnetic domains in the channels of lower coercivity; and a baseplate with electrical connections. The areas of lower coercivity follow a path similar to a spiral with its one end adjacent to the center of the support and the other end adjacent to a corner of the support and executing at least one full 360.degree. turn between both ends. The domain storage devices of this type are distinguished by a higher storage capacity.