Current controlled disk replicator

Details Current controlled disk replicator Current controlled disk replicator

1978-05-04

1980-10-21

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Generators

365 34, G11C 1908

Patent

active

042298075

ABSTRACT:
A magnetic bubble domain chip having two levels of metallurgy fabricated in a single masking step and including a replicate type bubble generator. The bubble generator includes a magnetic disk which holds a seed domain during reorientation of a magnetic drive field in the plane of the magnetic bubble material, and a conductor located at the leading, i.e., cutting, edge of the magnetic disk. Current in the conductor is used to assist the splitting operation whereby a new domain is split from the stretched seed domain. The conductor includes a first portion having a relatively wide cross-section where most of the current flows through a highly conductive material, such as gold. In the area of the generator, the conductor is narrow and the current path is through the magnetic material comprising the disk. Use of the magnetic material as a conductor path reduces problems due to electromigration and the generator is particularly suitable for use in providing magnetic bubble domains having diameters 2 microns and less.

REFERENCES:
patent: 3925769 (1975-12-01), George
patent: 4079359 (1978-03-01), Gergis
IBM Technical Disclosure Bulletin-vol. 19, No. 7, Dec. 1976, pp. 2751-2752.

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