One of the most significant recent technology developments was the commercialization of perpendicular magnetic recording. Starting in 2005 perpendicular magnetic recording significantly facilitated a tenfold increase of data capacity in hard disk drives. Capacities of up to ten terabytes are the norm today. This breakthrough was made possible by use of a unique perpendicular magnetic recording medium known as the oxide medium which was first developed in Toshiba under the leadership of Dr. Yoichiro Tanaka. Dr. Tanaka’s team also integrated this oxide medium into the industry’s first perpendicular magnetic recording hard disk drive. This oral history records Dr. Tanaka’s contributions to these successes.
Toshiba Corporation; Perpendicular Magnetic Recording; Granular Magnetic Medium; Oxide Medium; Ruthenium; Ruthenium underlayer