Bubble domain structuring in bubble domain memory plane

Details Bubble domain structuring in bubble domain memory plane Bubble domain structuring in bubble domain memory plane

1977-04-11

1978-09-12

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Disposition of elements

365 37, G11C 1908

Patent

active

041141911

ABSTRACT:
Defining the structuring of bubble domains in a magnetizable layer of a bubble domain memory plane is determined by modifying the magnetic characteristics of the magnetizable layer in the confinement area. The bubble domain memory plane is comprised of a non-magnetic Gadolinium Gallium Garnet (GGG) layer which is a supporting layer upon which is formed by the liquid phase epitaxy (LPE) method a plurality of magnetizable layers in each of which a bubble domain is capable of being generated and sustained. Upon the memory plane are formed, as by any of many well-known deposition techniques, a matrix array of a parallel set of horizontally oriented X drive lines and an orthogonally oriented parallel set of Y drive lines. Each X drive line, Y drive line intersection of the matrix array defines a memory area having four quadrants. In only one of the four quadrants is there provided a bubble domain supporting magnetizable layer, all other areas of the memory plane having no magnetizable layer or a magnetizable layer of an insufficient thickness to support bubble domains therein. Accordingly, in only one of the four quadrants of each of the memory areas is there a magnetizable layer of sufficient thickness to support a bubble domain thereat.

REFERENCES:
patent: 3715736 (1973-02-01), O'Donnell et al.
patent: 3717853 (1973-02-01), O'Donnell et al.
patent: 3790935 (1974-02-01), Luff
patent: 3913079 (1975-10-01), Rosier
patent: 4011550 (1977-03-01), Torok et al.

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