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bubble memory

noun, Computers.
1.
a storage medium employing tiny, movable, bubble-shaped magnetized areas within a magnetic material to represent data bits.
Origin
1970-1975
1970-75
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for bubble memory
  • The lab was working on the picture phone and on the development of semiconductor bubble memory.
British Dictionary definitions for bubble memory

bubble memory

noun
1.
(computing) a method of storing high volumes of data by the use of minute pockets of magnetism (bubbles) in a semiconducting material: the bubbles may be caused to migrate past a read head or to a buffer area for storage
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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bubble memory in Technology


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 , Appendix C]
(1995-02-03)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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