Basic Research on Tera-bits Spinic Data Storage

为了克服传统逐道记录对面记录密度和传输速率的限制，研究了基于多道并行记录和亚微米窄道记录与二维信号处理相结合的高速高密度自旋存储系统。1995年，对集成并行记录头的外形和并行信号处理进行了研究，并于1996年开始了高分辨率单极头的设计。在本项目的最后一年，即1997年，研制了磁头，并对其记录性能进行了评估和研究。在飞行滑块上激励单极磁头的薄膜导体显示出很高的记录灵敏度，0.05AT，极低的电感，2NH，实现了高速数据传输。对用于垂直磁记录的磁头读数进行了不断的研究，与常规方法相比，线密度增加了一倍。结果在理论上得到了改进。单极磁头表现出与双层垂直介质相关的优越的读/写性能。此外，通过计算机模拟得到了清晰的磁道边缘，并与新研制的飞行单极磁头进行了实验验证。通过上述结果，研究了100Gbit/in2面密度垂直磁记录的潜力，最终得到了极高面密度自旋存储的证据。

High speed high density spinic storage system based on multi-track parallel recording associated with submicron width narrow track recording and two-dimensional signal processing is investigated, in order to get rid of the limitation of areal recording density and transfer rate for conventional track-by-track recording. In 1995, outline of integrated parallel recording head and parallel signal processing was studied, and a design of high resolution single pole head was started in 1996. In the last year for this project, in 1997, the head was prepared and its recording performance has been evaluated and investigated as the spinic storage.The thin-film conductor exciting single pole head on a flying slider indicated very high recording sensitivity, 0.05AT,and extremely low inductance, 2nH,which realized high speed data transfer. Investigation of MR head reading for perpendicular magnetic recording has been continuously done, which brought doubling linear density comparing conventional method. The results were theoretically improved. The single pole head was demonstrated superior read/write performance associated with the double layr perpendicular media. In addition, well-defined track edge that was shown by computer simulation was experimentally confirmed with the newly developed flying single pole head.By above mentioned results, potential of perpendicular magnetic recording for areal density of 100 Gbits/inch^2 has been investigated, which end up with the evidence of extremely high areal density spinic storage.