Patent ID: 8307022
Filing Date: 2012-11-06
Classification: G06F,H03K

Abstract:
1. A random number generating device comprising: a pulse voltage generator configured to generate a pulse voltage having an amplitude of 26 mV or more; a random noise generating element including source and drain regions formed at a distance from each other on a semiconductor substrate, a tunnel insulating film formed on a portion of the semiconductor substrate located between the source region and the drain region, a gate electrode formed above the tunnel insulating film and to which the pulse voltage is applied, and a trap insulating film provided between the tunnel insulating film and the gate electrode, the random noise generating element configured to generate a random noise contained in a current flowing between the source region and the drain region; and a random number generating unit configured to generate a random number signal based on the random noise, wherein: the trap insulating film has dangling bonds, and is expressed as: Si the random noise generating element satisfies an equation: where L represents a channel length [μm] of the channel region, W represents a channel width [μm] of the channel region, T represents a thickness [nm] of the tunnel insulating film (T≧0), and H represents a barrier height [eV] between the semiconductor substrate and the tunnel insulating film.