|1.Research Institution||Tohoku University|
|2.University-Industry Cooperative Research Committee||144th Committee on Magnetic Recording|
|3.Term of Project||FY 1999 - FY 2003|
|5.Title of Project||Research on Ultralarge-capacity High-speed Perpendicular Storage System|
|Name||InstitutionCDepartment||Title of Position|
|Yoshihisa,Nakamura||Tohoku University,Research Institute of Electrical Communication||Professor|
|Names||Institution,Department||Title of Position|
|Yutaka, Sugita||Tohoku Institute of Technology , Faculty of Engineering||Professor|
|Hiroaki , Muraoka||Tohoku University , Research Institute of Electrical Communication||Professor|
|Hisashi, Takano||Central Research Laboratory, Hitachi LTD.||Department Manager|
8.Summary of Research Results
Purpose of this program is to attain high-areal density magnetic recording of 100 Gbits/inch2 with perpendicular magnetic recording, which has been developed by the JSPS 144th Committee on Magnetic Recording.
A single-pole head and perpendicular disk media are the key devices for high density recording. An FeCo film that has a very large magnetic flux density was developed in order to attain high writing ability. A novel cusp-coil single-pole head was then fabricated, and proved to show a good writing ability. A low noise perpendicular media that has the granular micro-structure was also developed.
Using the improved head/disk devices, members of this project, Hitachi, Tohoku Univ and AIT, demonstrated 52.5 Gbits/inch2 perpendicular magnetic recording in 2000, which gave a great impact to whole storage industry. The attained areal density has been raised up to 90 Gbits/inch2 during this program. The demonstrations indicated the possibility and extendability of perpendicular magnetic recording. Perpendicular magnetic recording thus provided a great contribution of Japan for this technology area.
As an application of high-density perpendicular magnetic recording, a motion picture storage system was investigated from the viewpoint of fast data transfer of hard disk drives. A large capacity motion picture files of medical data were successfully transmitted via internet between Akita and Sendai.