Patent ID: 8154908
Filing Date: 2012-04-10
Classification: G11C

Abstract:
1. A nonvolatile semiconductor storage device comprising: a plurality of first wires and a plurality of second wires intersecting each other; a plurality of memory cells which is disposed at each intersection of the plurality of first wires and the plurality of second wires and having a variable resistor and a rectifying device are connected in series; and a control circuit which applies a voltage to the first and second wires, wherein the control circuit precharges non-selected second wires of the plurality of second wires up to a standby voltage larger than a reference voltage prior to a set operation for programming only a variable resistor connected to a selected first wire of the plurality of first wires and a selected second wire of the plurality of second wires by supplying the reference voltage to non-selected first wires of the plurality of first wires and the selected second wire, applying a program voltage for programming of the selected variable resistor in a selected memory cell of the plurality of memory cells to the selected first wire and applying a control voltage which prevents the rectifying device from turning ON.