G - Physics – 11 – C
Patent
G - Physics
11
C
352/37.2
G11C 11/14 (2006.01) G11C 19/08 (2006.01)
Patent
CA 1151291
A CLOSE-PACKED BUBBLE PROPAGATION DEVICE Abstract A close-packed magnetic bubble propagation device includes a pattern having a plurality of propagation elements positioned in at least four adjacent rows. These elements are spaced to provide a period or spac- ing of bubbles in these rows of less than three bubble diameters. Upon application of a rotating in-plane field to the elements, bubbles in adjacent rows move in opposite directions. A preferred embodiment of this propagation device has at least two storage loops which contain at least four adjacent horizontal rows of propagation elements. A preferred device utilizing this pattern has at least two storage loops and an access path which passes through each of the loops. An electrical conductor is associated with the propagation elements in the access path so that the passing of a current through the conductor together with the appli- cation of an in-plane rotating field to the elements causes bubbles associated with the elements in the access path to move along the access path. Preferably, the pattern is surrounded by an array of confinement elements which confine the bubbles to the storage loops and the access path. SA978015
336147
Barrett B.p.
International Business Machines Corporation
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