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Meaning of BUBBLE MEMORY

 
Computing Dictionary
 
 Definition: 

A storage device built using materials such as gadolinium gallium garnet which are can be magnetised easily in only one direction. A film of these materials can be created so that it is magnetisable in an up-down direction. The magnetic fields tend to join together, some with the north pole facing up, some with the south.

When a veritcal magnetic field is imposed on this, the areas in opposite alignment to the field shrink to circles, or 'bubbles'. A bubble can be formed by reversing the field in a small spot, and can be destroyed by increasing the field.

Bubble memory is a kind of non-volatile storage but eeprom, flash erasable programmable read-only memory and ferroelectric technologies, which are also non-volatile, are faster.

["Great Microprocessors of the Past and Present", V 4.0.0, John Bayko <bayko@hercules.cs.uregina.ca>, Appendix C]

 

 

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