High-density magnetic bubble memory device

Details High-density magnetic bubble memory device High-density magnetic bubble memory device

1984-03-19

1986-10-14

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Guide structure

G11C 1908

Patent

active

046176446

ABSTRACT:
A high-density magnetic bubble memory device using magnetic bubbles having a diameter not larger than 2 .mu.m comprises a magnetic layer capable of sustaining the bubbles therein, and a propagation pattern formed in or on a surface of the magnetic layer. In the device, a relation H/d.ltoreq.0.8 is satisfied wherein H is the thickness of the magnetic layer and d the diameter of the bubble. When the propagation pattern is made of a permalloy, h/d (h: bubble height in that case) is not larger than 0.8. When the propagation pattern is formed through ion implantation, h'/d (h': bubble height in that case) is not larger than 0.6.

REFERENCES:
patent: 4070658 (1978-01-01), Giess et al.
patent: 4237544 (1980-12-01), Bonyhard
IBM Journal of Research & Development--vol. 25, No. 4, Jul. 1981; pp. 295-302.
IEEE Transactions on Magnetics--vol. MAG-16, No. 1, Jan. 1980, pp. 93-98.

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