Showa Denko: Development of heat-assisted magnetic recording (HAMR) technology: Realization of recording capacity of 70 to 80 TB
February 6, 2020
Showa Denko:
Showa Denko has developed a technology for manufacturing next-generation HD media that supports heat-assisted magnetic recording (HAMR), which is the next-generation recording technology for HDDs.
Using one of the strongest magnetic materials (excellent in corrosion resistance) Fe-Pt-based magnetic alloy thin film to form the magnetic recording layer, we successfully commercialized a HAMR-compatible HDD.
Heat assisted magnetic recording (HAMR):
We have added our unique device for temperature control when manufacturing HD media.
High coercive force several times higher than the latest HD media,
Achieved low noise with crystal grain size / miniaturization and optimal dispersion control.
HD media with the industry’s highest level in both electromagnetic conversion characteristics and durability,
(Note) HAMR (Heat Assisted Magnetic Recording):
The “magnetic recording trilemma” is:
Fine particle structure,
Heat fluctuation performance,
Ease of magnetization,
It means that it is difficult to satisfy all three factors at the same time.
In order to solve this trilemma, we found a method of recording by locally heating the magnetic film during recording.
Conventional magnetic recording density:
The recording density of HD media using the conventional magnetic recording method is about 1.14 Tb / in2.
Current magnetic recording density:
It is said that if HAMR technology is used, 5 to 6 Tb / in2 will be realized in the future.
It is expected that a recording capacity of 70-80TB per 3.5-inch HDD can be achieved.
News Release | Showa Denko