Ion implanted contiguous disk magnetic bubble devices: Projections of performance

A critical analysis is made of the contiguous disk magnetic bubble technology. First, an analysis is made of existing components and devices. Factors such as current density, power dissipation, and frequency of operation are considered. Then, having established the present status of these components, scaling rules for the materials and components are derived. Using these scaling rules projections are made of the performance of devices which are scaled to higher density. It is shown that the existing device components have sufficiently low current densities and power dissipation that 4-μm period storage devices operating at frequencies up to 200 kHz are feasible. Furthermore, scaling rules indicate that 2-μm period devices may also be expected to operate with similar power dissipation and no problems with electromigration. Contiguous disk devices are thus projected to surpass conventional Permalloy bubble devices by a factor of 16 in density and to offer a reduction in power dissipation. Performance will be at least equal to that of conventional devices and will be limited by the rotating field drive circuitry.