Patent ID: 6122192
Filing Date: 2000-09-19
Classification: H01L

Abstract:
A non-volatile semiconductor memory device comprising a semiconductor substrate and a memory element provided with a floating gate and a control gate, said non-volatile semiconductor memory device including a first junction diode and a second junction diode, wherein:said first junction diode functions in such manner that a reverse voltage is applied thereto when a positive voltage is applied to said control gate, and said first junction diode conducts a reverse current therethrough when a positive voltage applied to said control gate is greater than all of a write voltage, a read voltage, and an erasure voltage that are applied to said control gate;said second junction diode is connected electrically to said first junction diode and functions in such a manner that a reverse voltage is applied thereto when a negative voltage is applied to said control gate, and said second junction diode conducts a reverse current therethrough when a negative voltage applied to said control gate has an absolute value that is greater than all of a write voltage, a read voltage, and an erasure voltage that are applied to said control gate; anda circuit formed of said first junction diode and said second junction diode is connected electrically to said control gate.