Hitachi Maxell and the Tokyo Institute of Technology have developed new tape media that enables a storage capacity of over 50TB per tape cartridge:
Hitachi Maxell, Ltd. and Tokyo Institute of Technology today jointly announced the collaboratively development of ultra high capacity tape media with ultra thin nano-structured magnetic film by using of facing targets sputtering method, as a funded program of “Collaborative Development of Innovative Seeds, Practicability Verification Stage”*3 of the Japan Science Technology Agency (JST). This joint team demonstrated a world-record*1 areal density of 45.0 Gb/in2 *2 in linear formatted perpendicular magnetic recording media. This latest technology*4 is a future technology after coated tape generations and enables over 50 TB capacity per a standard tape cartridge, which equals to 33 times*5 larger than a capacity of the latest LTO Ultrium 5 data cartridge.
Today, the usage of the data storage tape has expanded for the development of the information technology society, the electric archive in the public libraries and the public records offices, and the long-term storage of the business writing. Especially, the eco-friendly storage system, the so-called “green storage”, that lowers power consumption and considers the environment, is demanded recently.
The coating type medium, which is made by coating the magnetic powder on the base film, is commonly used as a tape medium for the data storage now. It was difficult to make a thin film with the magnetic particles of the size below 10 nm by the coating method though it was necessary to make the magnetic powder small to increase the areal recording density and to raise storage capacity a cartridge.
This time, the super-high density nanometer-sized magnetic thin film was achieved by an open innovation by the combination of Maxell’s tape medium design/evaluation technologies and the new thin-film formation method, "Facing Targets Sputtering method" that associate professor Shigeki Nakagawa et al. in the Tokyo Institute of Technology, Graduate School of Engineering, Department of Physical Electronics developed. It allows us to make the large-capacity magnetic tape by low-noise laminated soft magnetic underlayers*6 and the magnetic recording film with less 10 nm-diameter crystal grains.
When the areal recording density of the tape medium with this nanometer-structured super-high density magnetic thin film was evaluated, it was clarified of the possession of the areal recording density of 45.0 Gb/in2. When one makes the data tape cartridge of the common, linear formatted package by this medium, the capacity of the cartridge could be 50 TB or more.