Fujitsu of America announced another advancement in its
research of magnetic recording. Using patterned media technology, Fujitsu was
able to achieve a one-dimensional array nanohole pattern with a 25 nanometer pitch.
This process could one day enable one terabit per square inch recording on HDDs.
Fujitsu also revealed a new development involving perpendicular magnetic
recording read/write operation on random patterned media. With this technology,
the soft underlayer is used as the PMR media, another important milestone.
A density of one terabit per square inch is about five times
greater than the current drive technology on the market. Applying a one terabit
areal density figure to today’s drive sizes would give us 3.5” drives capable
of storing 5TB or 2.5” notebook drives holding 1.5TB.
Fujitsu first announced innovations with patterned media
recording in June 2005. At that time, advancements were made with the
introduction of a process to pre-pit aluminum media, resulting in nanoholes
with an extremely dense and ordered structure. In addition, a technique called
land/groove texturing allowed for the creation of discrete tracks in which the nanoholes
could be formed. This progress in patterned media has enabled the development
of high capacity hard disk drives, especially in smaller form factors.
This progress in patterned media recording closely follows
the November 2006
Fujitsu announcement regarding the optical element being developed for thermal
assisted recording, another promising advancement for future capacity