Information recording medium

Patent Granted PROBLEM TO BE SOLVED: To efficiently process recording and reproducing of super large scale data with respect to an information recording medium (fade-in memory element) of a petabyte class. ; SOLUTION: An information recording medium used for a fade-in memory is an arrangement in which metal nano-particles 16 are processed to nano-scale and self-organized on a semiconductor chip, and the metal nano-particles 16 are a basic unit of an information recording element. In recording, current magnetization inverse is used by electric field radiation cathode array by a half metal material, in reproducing, spin arrangement information of metal nano-particles 16 is read out by propagation of a near field light generated through a near field light switching element 17 being nano-processed by a near field light conversion element 18.