Patent ID: 6771544
Filing Date: 2004-08-03
Classification: G11C,H01L

Abstract:
A method of writing data in an EEPROM using a single supply voltage, the EEPROM including a memory cell array having a plurality of memory cells, each memory cell comprising a storage transistor having a source and a drain, a floating gate and a control gate disposed over the floating gate, said method comprising steps of:applying a first voltage higher than both the supply voltage and a ground voltage to at least one of the source and drain of the storage transistor of each of selected memory cells; the first voltage being generated from the single supply voltage; applying a second voltage lower than both the supply voltage and the ground voltage to the control gate of the storage transistor of each of the selected memory cells while the first voltage is applied to at least one of the source and drain, whereby electrons are released from the floating gate when both the first and second voltages are applied, the second voltage being generated from the single supply voltage.