METHOD OF PRODUCING MAGNETIC STORAGE MEDIUM, MAGNETIC STORAGE MEDIUM AND INFORMATION STORAGE DEVICE

摘要

IT IS AN OBJECT TO PRODUCE A MAGNETIC STORAGE MEDIUM OF A HIGH RECORDING DENSITY BY A PRODUCTION METHOD THAT DOES NOT IMPAIR MASS PRODUCTIVITY, AND A MAGNETIC STORAGE MEDIUM (10) IS PRODUCED BY A PRODUCTION METHOD INCLUDING: A MAGNETIC-FILM FORMING STEP OF FORMING A MAGNETIC FILM (62) ON A SUBSTRATE (61); AND A DOTS SEPARATING STEP OF REDUCING SATURATION MAGNETIZATION BY LOCALLY INJECTING MIXED IONS OF N2+ ION AND N+ ION INTO AN AREA, OF THE SUBSTRATE (61), OTHER THAN PLURAL AREAS WHICH RESPECTIVELY BECOME MAGNETIC DOTS (62C) WHERE INFORMATION IS TO BE MAGNETICALLY RECORDED, THEREBY FORMING, BETWEEN THE MAGNETIC DOTS (62C), A BETWEEN-DOT SEPARATOR (62D) HAVING SATURATION MAGNETIZATION SMALLER THAN SATURATION MAGNETIZATION OF THE MAGNETIC DOTS (62C). THE MOST ILLUSTRATIVE DRAWING IS