Patent ID: 6872614

Claim:
A method of writing data into a nonvolatile semiconductor memory device, said nonvolatile semiconductor memory device comprising: a substrate; a plurality of memory transistors formed in the substrate and arranged in a word direction and a bit direction; a pull-up electrode, each memory transistor including: a semiconductor channel forming region formed in the substrate; a gate insulating film formed on the semiconductor channel forming region and comprising a Fowler-Nordheim (FN) type tunneling film which has a FN type tunneling electroconductivity and contains material having a dielectric constant greater than that of silicon oxide; a gate electrode formed on the gate insulating film; and a charge storing means, formed in the gate insulating film, and facing to the surface of the channel forming region, said pull-up electrode formed in the vicinity of the gate electrode or a wiring layer connected to the gate electrode via a dielectric film, said writing method including a step of applying a voltage to the pull-up electrode to rate a potential of the gate electrode; wherein a reverse bias voltage is applied to a source region of the memory transistor via a source line commonly connecting the source regions of the plurality of memory transistors in the bit direction, and/or, a drain region of the memory transistor via a bit line commonly connecting the drain regions of the plurality of memory transistors in the bit direction, and wherein the voltage having a polarity for reverse-biasing is applied via a word line commonly connecting the gate electrodes of the plurality of memory transistors in the word direction.