Patent ID: 7847587
Filing Date: 2010-12-07
Classification: G11C,H01L

Abstract:
1. A semiconductor integrated circuit, comprising: a voltage supply terminal; a first input terminal fed with a first input signal; an output terminal that outputs an output signal; a second input terminal fed with a second input signal; a first MOS transistor having one end connected to the voltage supply terminal and a gate electrode connected to the first input terminal; a second MOS transistor having one end connected to a first potential, an other end connected to the output terminal, and a gate electrode connected to the second input terminal; and a program element acting as a MOS transistor having one end connected to the other end of the second MOS transistor and an other end connected to a second potential higher than the first potential, wherein the program element includes a gate electrode having one end connected to an other end of the first MOS transistor and an other end connected to a ground potential and including a polysilicon film formed on a gate insulating film and a silicide film formed on the polysilicon film, in a writing mode for writing data into the program element, the voltage supply terminal has a potential set at a positive writing potential and the first MOS transistor is turned on for a predetermined period by the first input signal, so that electro migration is caused to occur on the silicide film, and in a reading mode for reading data stored in the program element, the voltage supply terminal has a potential set at a positive reading potential lower than the writing potential, the first MOS transistor is turned on for a predetermined period by the first input signal, and then the second MOS transistor is turned on for a predetermined period by the second input signal.