Magnetic-bubble memory device

Details Magnetic-bubble memory device Magnetic-bubble memory device

1983-07-14

1986-11-25

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Guide structure

G11C 1908

Patent

active

046252975

ABSTRACT:
A magnetic-bubble memory device having a bubble propagation track, defined by patterns of magnetically soft material, along which magnetic bubbles propagate in response to an in-plane rotating magnetic drive field. The bubble propagation track has a first track and a second track interconnected by a turn and defined by known hook-shaped wide-gap patterns or by modified wide-gap patterns. The turn includes a crooked bar-shaped pattern. An end portion of the last pattern of the first track is positioned opposite the inner edge of the crooked bar-shaped pattern, and an end portion of the crooked bar-shaped pattern is positioned adjacent to the first pattern of the second track. Such a bubble propagation track makes it possible to realize a 4 .mu.m period, 4 Mb bubble memory.

REFERENCES:
patent: 4355373 (1982-10-01), Bobeck
patent: 4357682 (1982-11-01), Shapiro
patent: 4486858 (1984-12-01), Yanase et al.

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