Nonvolatile semiconductor memory
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United States of America Patent
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Apr 1, 2014
Grant Date -
Jan 19, 2012
app pub date -
Aug 9, 2011
filing date -
Nov 1, 2004
priority date (Note) -
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Abstract
A hot electron (BBHE) is generated close to a drain by tunneling between bands, and it data writing is performed by injecting the hot electron into a charge storage layer. When Vg is a gate voltage, Vsub is a cell well voltage, Vs is a source voltage and Vd is a drain voltage, a relation of Vg>Vsub>Vs>Vd is satisfied, Vg−Vd is a value of a potential difference required for generating a tunnel current between the bands or higher, and Vsub−Vd is substantially equivalent to a barrier potential of the tunnel insulating film or higher.
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