Abstract: In magnetic bubble domain chips using layers of crystalline material having in-plane magnetization for propagation, hard bubble suppression, etc., asymmetric propagation often results due to crystalline anisotropies in the layer of in-plane magnetization. In these chips, different propagation margins result for propagation in different directions with respect to the crystalline axes of the in-plane layer. In the present magnetic chip, a plurality of shift registers is provided for movement of bubble domains in a plurality of directions, all of which provide good propagation margins. The registers are aligned in particular directions with respect to the directions of easy stripout of bubble domains in order to avoid the problem of asymmetric propagation. Examples are shown using ion implanted contiguous element propagation patterns organized in a major/minor loop type of storage organization.

Abstract: An improved ion implanted propagation structure for movement of magnetic bubble domains in a storage medium which comprises an additional magnetic layer capable of ion implantation in combination with a bubble domain storage layer in which the bubble domains exist and are moved by the ion implanted layer in response to the reorientation of a magnetic field in the plane of the ion implanted layer. The ion implanted layer (drive layer) can be in intimate contact with the storage layer and exchange coupled thereto, or can be separated from the storage layer by a non-magnetic spacer. The ion implanted layer can comprise different geometry propagation elements and its thickness, 4.pi.M, and other magnetic properties are generally selected to provide flux matching of a charged wall in the ion implanted layer with the flux emanating from the bubble domains to be moved. The charged wall is coupled to the bubble domain by exchange coupling and/or magnetostatic coupling. SUBACKGROUND OF THE INVENTION1.

Abstract: A dynamic pattern display and optical data processing system is provided including magnetic bubble devices which may be operated in real-time to produce a multi-tone (gray scale) two dimensional pattern. The display pattern is obtained by directing a light beam, which in certain applications may be linearly polarized, through a plurality of two-dimensional magnetic bubble arrays combined in a stack arrangement. Each magnetic bubble array constitutes a layer which differs in thickness from the other magnetic bubble layers. Each magnetic bubble array is also electronically driven by its own bubble propagating circuit which produces, in most embodiments, a different "local transmissivity" which is determined by whether a bubble or an empty space is propagated to the location. The degree of transmitted intensity is an exponential function of the number of magnetic bubble layers, thus n layers provides 2.sup.n steps of transmitted intensity and a four layer structure provides a sixteen tone gray scale display.