Static information storage and retrieval – Magnetic bubbles – Guide structure
Patent
1987-08-21
1990-04-03
Moffitt, James W.
Static information storage and retrieval
Magnetic bubbles
Guide structure
365 34, 365 38, G11C 1908
Patent
active
049146262
ABSTRACT:
An improved magnetic bubble memory device includes a continuous propagator overlay on a sheet of magnetic material. The propagator overlay being adapted to reduce the statistical switching effects and overall coercivity of the propagator overlay. The propagator overlay consists of multiple layers of soft magnetic material being alternately arranged with non-magnetic material, in a geometric pattern specified so as to produce domain walls only internal to the pattern boundary, the soft magnetic material being chosen for its initial low coercivity characteristics and having characteristics approaching zero magneto-striction.
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