Field access bubble lattice file device

Static information storage and retrieval – Magnetic bubbles – Disposition of elements

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365 8, G11C 1908

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active

041258762

ABSTRACT:
A bubble lattice file comprising a plurality of propagate elements of magnetic film material positioned as an overlay over bubble supporting material with each element spaced from the bubble material such that a spacing gradient is formed between the element and the bubble material in the direction of the bubble propagation path. The elements comprising the main lattice memory file are arranged to support a hexagonal lattice of bubbles with one bubble propagation path in the form of rows and the other propagation path comprising accessing channels in the form of spaced apart columns. Utilizing the translation force on a bubble domain produced by the spacing gradient between the magnetic film and the bubble material, all bubbles in the lattice may be translated along the rows by a monopolar magnetic field applied in the row direction and when accessing is required, a monopolar field in the column direction is applied and all bubbles in equilibrium in the element of the rows which intersect the columns will move to the elements of the accessing channels and along its elements upon the continued application of the field ultimately exiting into a reading station. Concurrently, the read data may be reentered into the lattice at the entrance end of the columns.

REFERENCES:
patent: 3927398 (1975-12-01), Dimyan
patent: 4023150 (1977-05-01), Voegeli
patent: 4028685 (1977-06-01), Eggenberger et al.
patent: 4034357 (1977-07-01), Mehta et al.
Proceedings of the IEEE - Dec. 1973; pp. 1761-1762.

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