Conductorless transfer for magnetic bubble memories
AssigneeBell Telephone Laboratories, Incorporated
InventorHerbert M. Shapiro
Life of this patent
Estimating the term…
Abstract
A conductorless transfer is provided for a large-gap tolerant Permalloy pattern for moving magnetic bubbles. The transfer capitalizes on the symmetry of the elements for enabling a field reversal to achieve transfer.
Claims7
A magnetic bubble memory including a layer of magnetic material in which magnetic bubbles having a minimum diameter d can be moved, and propagations means for moving bubbles in said layer synchronously along at least first and second paths responsive to a magnetic field reorienting in a first direction in the plane of said layer, said propagation means including a pattern of magnetic elements spaced apart distances large compared with d and defining at least a first transfer position for moving bubbles between said first and second paths in response to reorientation of said field in a second direction.
A magnetic bubble memory (10) including a layer of magnetic material in which magnetic bubbles having a minimum diameter d can be moved, and propagation means (1.sub.1 . . . 1.sub.k ML and 30) for moving bubbles in the layer synchronously along at least first and second paths (ML and L.sub.3 of FIG. 2) responsive to a magnetic field reorienting in a first direction in the plane of the layer, the memory being CHARACTERIZED BY a pattern of magnetically soft elements (FIGS. 2 and 3) spaced apart distances large compared with d and defining at least a first transfer position (P.sub.2 to P.sub.T on elements 45 and 46 in FIG. 2) for moving bubbles between the first and second paths (ML and L.sub.3) in response to a reorientation of the magnetic field in a second direction.
Dependencies are inferred from the claim text.