Bubble memory with increased gap tolerance between propagation e

Details Bubble memory with increased gap tolerance between propagation e Bubble memory with increased gap tolerance between propagation e

1980-04-25

1982-06-01

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Guide structure

G11C 1908

Patent

active

043331637

ABSTRACT:
In a bubble memory, propagation elements are configured so that shorts between adjacent elements as a result of fabrication inaccuracies do not destroy their poles and create barriers to bubble propagation. In designing the bubble memory, the gaps can thus approach the resolution limit of the photolithography, resulting in a higher storage density and a reduced operating drive field. In one embodiment permalloy chevrons which overlie a garnet film have opposing side edges defining a gap therebetween which increases in width moving in a direction away from the poles.

REFERENCES:
patent: 3815107 (1974-06-01), Almasi
patent: 3940631 (1976-02-01), Bailey
patent: 4094004 (1978-06-01), Dimyan
patent: 4094006 (1978-06-01), Dimyan
patent: 4156935 (1979-05-01), Bullock
patent: 4176404 (1979-11-01), Dimyan et al.
IEEE Transactions on Magnetics--Vol--Mag--12, No. 6 Nov. 1976 pp. 651-653.

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