Magnetic bubble device

Details Magnetic bubble device Magnetic bubble device

1984-07-24

1986-05-13

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Guide structure

365 38, G11C 1908

Patent

active

045890943

ABSTRACT:
A magnetic bubble device includes ion-implanted bubble propagation tracks of meandering cord-like configuration to assure improved bubble propagation characteristic. Amplitude of a region in which inplane magnetization layer is absent or alternatively thickness thereof is smaller than that of other region, as measured in the direction perpendicular to the bubble propagating direction, is not greater than 7/8 of a pitch of the meandering pattern in the bubble propagating direction. The amplitude is more preferably selected so as to meet the condition that 1/4.ltoreq.W/P.ltoreq.3/4 for assuring much stabilized bubble propagating operation.

REFERENCES:
patent: 3518643 (1970-06-01), Perneski
patent: 3534346 (1970-10-01), Bobeck
patent: 3540019 (1970-11-01), Bobeck et al.
patent: 4402060 (1983-08-01), Best et al.
patent: 4403304 (1983-09-01), Gergls
patent: 4403305 (1983-09-01), Keefe et al.

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