U.S. Philips Corporation

Franciscus Antonius Kuijpers

Antonius G Verhulst

Willem Frederik Druyvesteyn

Evert H Dekker

Adrianus Wilhelmus Van Den Enden

Antonius Henricus Roovers

A magnetic bubble domain memory system having a first bubble domain path composed of Permalloy pattern elements, and a second bubble domain path composed of a current conductor is disclosed. Separate drives are associated with each of the paths, so the advantages of both types of domain propagation can be combined on a single memory chip. The first and second paths are interconnected, so transfer of domains between paths is possible.

Magnetic domain device

A storage device comprising a main magnetic field generator, a rotary magnetic field generator and a number of plates of magnetic material which are arranged transverse to the main magnetic field and in which magnetic domains can be formed and transported along a domain guide structure consisting of discrete element. The domain guide structure comprises a switching device incorporating diverging switches which are arranged according to four orientations which correspond to corresponding orientations of discrete elements of said domain guide structure. The domain guide structures comprise diverging switches which may be arranged to be shifted with respect to each other over one or more discrete elements of the domain guide structure in different plates, each plate having a specific rotary magnetic field sequence.

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Eindhoven, Netherlands

Franciscus Antonius Kuijpers