A magnetic bubble memory has a reading zone with thin detection elements, coated with an insulating layer which carries thick bubble propagation patterns of high magnetic permeability material, and a bubble stretching zone also including {HEAD ~ thick propagation patterns} of {TAIL ~ shapes} such that the rotating field of the device causes the bubbles to progress along the patterns 
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A magnetic bubble memory has a reading zone with thin detection elements , coated with an insulating layer which carries thick bubble propagation patterns of high magnetic permeability material , and a bubble stretching zone also including { HEAD ~ thick propagation patterns } of { TAIL ~ shapes } such that the rotating field of the device causes the bubbles to progress along the patterns
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