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STUDIES ON HIGH-DENSITY AND LARGE-RECORDING-CAPACITY PERPENDICULAR MAGNETIC RECORDING SYSTEM

高密度大容量垂直磁记录系统的研究

基本信息

批准号：
61420030
负责人：
IWASAKI Shun-ichi
金额：
$ 21.89万
依托单位：
TOHOKU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (A)
财政年份：
1986
资助国家：
日本
起止时间：
1986 至 1988
项目状态：
已结题

项目摘要

The purpose of this project is to investigate the feasibility of application of perpendicular magnetic recording to the large-recording-capacity peripheral memory systems and to establish the guidelines to design a image file recording system.The obtained results in this project are as follows: (1) The highly sensitive main-pole driven perpendicular magnetic head was developed. Instead of a Co-system thin film, an Fe-Si multi-layer film was introduced to the main-pole of this perpendicular head to perform the saturation recording easily and to obtain superior recording performances at high densities. The recording and reproducing sensitivity of this head is several times as high as that of an auxiliary-pole driven perpendicular head which we have used thus far. (2) The conditions to fabricate the perpendicular recording media with a high crystalline orientation and a high recording resolution at a high-production-rate was found. (3) We have confirmed that the data recording was possible at a linear bit density of 2000 bits/mm, a track density of 21 tracks/mm and a bit error rate less than 10^<-5> by using the mainpole driven perpendicular head and the 3.5-inches flexible disk medium for which the durability over 10 million passes was ensured. Moreover, we have suceeded in digital recording of the still-pictures. The unformatted recording capacity in these recording conditions is estimated to be 20 mega-Bytes per both sides of disk media. Thus the purpose of this project has been almost achieved.

本计画旨在探讨垂直磁记录应用于大记录容量周边记忆体系统之可行性，并建立影像档案记录系统之设计准则，主要研究成果如下：（1）研制出高感度主极驱动垂直磁头。代替Co系薄膜，Fe-Si多层膜被引入到该垂直磁头的主极，以容易地执行饱和记录并在高密度下获得上级记录性能。这种磁头的记录和重放灵敏度是我们迄今所用的单极驱动垂直磁头的几倍。(2)（3）我们已经证实，通过使用主极驱动垂直磁头和3.5英寸软盘介质，可以在2000比特/mm的线性比特密度、21磁道/mm的磁道密度和小于10 μ s的比特误差率下进行数据记录<-5>，对于该介质，可以确保超过1000万遍的耐久性。此外，我们还成功地记录了静止图像。在这些记录条件下的未格式化记录容量估计为盘介质的每两面20兆字节。因此，该项目的目的几乎已经实现。