Research activities:
Our main interest lies in high-density information storage technology. The core technology is magnetic recording with fast data transfer and large storage capacity, which is applied for hard disk drives, magnetic tape storage, and flexible disk drives. Recently, multi-media information such as digital movie and music that requires very large storage capacity begins to be used in broad applications from consumer electronics to mobile communication. This trend accelerates the areal density increase of magnetic recording. Recording theories, devices, and systems based on perpendicular recording are being studied in order to attain ultra-high density information storage. Our target is the terabit storage (Over 5 Tbits/inch2 areal density), in which the bit size corresponds to the area of 10 nm by 10 nm.
Information Storage Systems Research Division (Profs MURAOKA, MIURA)
A single-pole head and perpendicular disks are investigated through read/write experiments, as shown in Fig 1, to improve the recording performance. For extremely large capacity storage systems, the storage grid working on a network, as shown in Fig 2, is also explored.
Research topics:
- High areal density hard disk drives
- Head/disk devices for high density magnetic storage
- Digital signal processing for high density storage
- Network storage for large capacity file server
Recording Theory Computation Research Division (Prof. GREAVES)
A computer simulation utilizing micromagnetics is being carried out to obtain a guideline towards ultra-high density recording.
Research topics:
- Micromagnetics simulation for high density read/write theory
Fig 1 Read/write measurement by using a single-pole head and a perpendicular media. |
Fig 2 A large-scale storage system with parallel HDD operation. |
