High Density Magnetic Bubble Memory Techniques

Several material compositions have been investigated with the goal of obtaining a material suitable for operation in devices requiring bubble domain diameters of approx 1 micrometer. An YSmTmGaIG composition has shown attractive material properties and has been submitted for device evaluation. Analy...

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Bibliographic Details
Main Authors: Besser,P J, Heinz,D M, Kobayashi,T, Chen,T
Format: Report
Language:English
Subjects:
BUBBLE MEMORIES
CALCIUM
CHIPS(ELECTRONICS)
Computer Hardware
Electricity and Magnetism
ERBIUM
GARNET
GERMANIUM
HIGH DENSITY
IRON
MAGNETIC DOMAINS
MAGNETIC MATERIALS
PE61102F
SAMARIUM
Self biased materials
WUAFAL2305R261
YTTRIUM
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Summary:Several material compositions have been investigated with the goal of obtaining a material suitable for operation in devices requiring bubble domain diameters of approx 1 micrometer. An YSmTmGaIG composition has shown attractive material properties and has been submitted for device evaluation. Analysis of self-biased structures has been performed. The results show a dependence of the effective bias field on the quality factor q. This analysis has provided improved criteria for selection of the optimum parameters for temperature stable self-biased materials/devices. Component designs for a hybrid decoder chip and a wafer level integration approach to a high capacity chip have been completed. A test chip incorporating several versions of the components has been submitted for fabrication and evaluation. A conceptual study of a 10 to the 12th power bit data storage system has been initiated. (Author)