Magnetic bubble memory device

Details Magnetic bubble memory device Magnetic bubble memory device

1981-07-14

1983-11-15

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Plural interacting paths

365 36, 365 41, G11C 1908

Patent

active

044159889

ABSTRACT:
A magnetic bubble memory device comprises: a magnetic layer which has a first region having the easy axis of magnetization extending in a certain direction and a second region surrounding said first region and having the easy axis of magnetization substantially perpendicular to that of the first region, said first region defining at least one major loop pattern for propagation of information bubbles and a plurality of minor loop patterns for storage of information bubbles; and an electrical conductor pattern deposited on said magnetic layer in a region in which the major loop pattern and the minor loop patterns are opposed to each other, thereby constructing a transfer gate. The major loop pattern is provided, at the portions thereof substantially opposed to the ends of the minor loop patterns in the transfer gate, with gaps through which the bubbles are transferred between the major loop pattern and the minor loop patterns. The transfer gate is driven by means of a convex-shaped pulse of transfer current.

REFERENCES:
patent: 4176404 (1979-11-01), Dimyan et al.
patent: 4249249 (1981-02-01), Bonyhard et al.
patent: 4283776 (1981-08-01), Nelson
Journal of Applied Physics-vol. 53; No. 3 Mar. 1981, pp. 2377-2379.

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