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10/07/2009 1:49 pm
Fowler-Nordheim Tunnelling Principle
The floating gate can be charged and discharged by using Fowler-Nordheim "tunnelling". A principle whereby certain electrons subjected to an electric field can cross the forbidden gap of an insulator to enter the conduction band and thus flow freely for a short distance to a positively charged area.
Is this 'tunnelling' principle still used today for flash memory chips in SIM Cards, mobile telephones and memory expansion cards?