Magnetic bubble memory device

Details Magnetic bubble memory device Magnetic bubble memory device

G - Physics

11

C

352/37.2

G11C 19/08 (2006.01)

Patent

CA 1238111

ABSTRACT OF THE DISCLOSURE This invention provides a magnetic bubble memory device comprising a magnetic layer in which magnetic bubbles can be moved and a bubble propagation path defined by a pattern of magnetically soft elements, each of the pattern elements having an asymmetrically crooked or curved shape with an entrance-side segment and an exit-side segment having different lengths. The pattern elements are arranged on the surface of the magnetic layer at a predetermined period in such a manner that the exit-side segment of one of the adjacent pattern elements is opposed to the outer side of the entrance- side segment of the other pattern element, with a gap therebetween. The difference in length between the entrance-side segment and the exit-side segment of the pattern element is 10 to 25% of the height of the pattern element. This bubble propagation pattern has a geometry which is favourable for gaining an increase in density and which can provide a high propagation characteristic.

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