G - Physics – 11 – C
Patent
G - Physics
11
C
352/37.2
G11C 19/08 (2006.01)
Patent
CA 1207444
ABSTRACT OF THE DISCLOSURE A magnetic-bubble memory device having a bubble propa- gation track, defined by patterns of magnetically soft mater- ial, along which magnetic bubbles propagate in response to an in-plane rotating magnetic drive field. The bubble propagation track has a first track and a second track interconnected by a turn and defined by known hook-shaped wide-gap patterns or by modified wide-gap patterns. The turn includes a crooked bar- shaped pattern. An end portion of the last pattern of the first track is positioned opposite the inner edge of the crooked bar-shaped pattern, and an end portion of the crooked bar-shaped pattern is positioned adjacent to the first pattern of the second track. Such a bubble propagation track makes it possible to realize a 4 µm period, 4 Mb bubble memory.
432330
Fujitsu Limited
Mcfadden Fincham
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