Investigation on high recording density magnetic contact duplication using patterned master media

使用图案母版介质进行高记录密度磁接触复制的研究

• 批准号: 16560291
• 负责人: SUGITA Ryuji
• 金额: $ 2.37万
• 依托单位: Ibaraki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16560291/
• 关键词: magnetic contact duplication; servo signal; hard disk; magnetic recording; master medium; phase servo; perpendicular magnetic recording; perpendicular magnetic duplication; 垂直記録; 垂直転写; スペーシングロス

In order to write a high quality servo signal at high speed and low cost on high density and large capacity hard disks, a nobel magnetic contact duplication method (patterned master magnetic contact duplication method) was investigated. The results are as follows.1. The influence of the spacing between master and slave and that of the direction of the magnetic field for duplication on magnetic contact duplication characteristics were clarified by using experiments and computer simulation. The values of the spacing loss factors were much lower than the conventional magnetic head recording. The oblique magnetic field to the master pattern deterioreted the duplication characteristics in both cases of oblique fields in the master plane and out of one. This result is useful for the phase servo pattern which is considered one of next generation servo methods.2. Magnetization distribution of master media and duplicated slave media, the relation between duplication condition and reproduced characteristics such as output and waveform were studied by simulation and experiment using enlarged models. From these studies, besides magnetization distribution in the master and slave media, demagnetizing factor of the master media could be inferred. Moreover, the influence of duplication field strength and master structure on reproduced waveform was clarified.3. Basic studies on magnetic duplication for perpendicular magnetic recording hard disks were performed with enlarged models and 3-dimentional finite element method. It was found that edge printing in which duplication field is applied in the disk plane is more advantageous than bit printing in which duplication field is applied in a direction perpendicular to the disk plane.

为了在高密度、大容量硬盘上高速、低成本地写入高质量的伺服信号，研究了一种新颖的磁接触复制方法（图案化母盘磁接触复制方法）。研究结果如下：1.通过实验和计算机仿真，阐明了主从机间距和复制磁场方向对磁接触复制特性的影响。间隔损耗因子的值远低于常规磁头记录。斜向磁场对母版图形的复制特性在母版平面内和一个平面外的斜向磁场的情况下都得到了证实。这一结果对被认为是下一代伺服方式之一的相位伺服模式有一定的参考价值.利用放大模型，通过仿真和实验研究了主介质和复制从介质的磁化分布，复制条件与输出、波形等再现特性的关系。从这些研究中，除了在主，从媒体磁化分布，主媒体的退磁因子可以推断。此外，还阐明了复制场强和母盘结构对再现波形的影响.采用放大模型和三维有限元方法对垂直磁记录硬盘的磁复制进行了基础研究。发现在盘平面中施加复制场的边缘打印比在垂直于盘平面的方向上施加复制场的比特打印更有利。

项目成果

Influence of soft-layer in perpendicular media on magnetic contact duplication characteristics

垂直介质中软层对磁接触复制特性的影响

• 发表时间: 2006
• 期刊: INTERMAG 2006 Digests
• 作者: T.Yokouchi;Y.Suzaki;K.Nakagawa;et al.;村田剛史;岡見智史;小峰啓史;Takeshi Murata;Satoshi Okami;Takashi Komine;富川智史;太田篤志;和泉昭彦;安田浩子;M.Nishikawa;A.Izumi
• 通讯作者: A.Izumi

面内磁気記録媒体への短ビットの磁気転写の性能と可能性

短位磁转移到纵向磁记录介质的性能和潜力

• 发表时间: 2006
• 期刊: 電子情報通信学会技術研究報告 MR2006-12
• 作者: T.Yokouchi;Y.Suzaki;K.Nakagawa;et al.;村田剛史;岡見智史;小峰啓史;Takeshi Murata;Satoshi Okami;Takashi Komine;富川智史;太田篤志;和泉昭彦;安田浩子;M.Nishikawa;A.Izumi;M.Nishikawa;長尾信
• 通讯作者: 長尾信

垂直磁気転写された磁化状態のマイクロマグネティックシミュレーション

垂直磁转移磁化状态的微磁模拟

• 发表时间: 2007
• 期刊: 日本応用磁気学会誌 31・3(in press)
• 作者: T.Yokouchi;Y.Suzaki;K.Nakagawa;et al.;村田剛史;岡見智史;小峰啓史
• 通讯作者: 小峰啓史

磁気転写及びヘッド記録された媒体磁化の数値解析

磁传输和磁头记录介质磁化的数值分析

• 发表时间: 2006
• 期刊: 日本応用磁気学会誌 30・2
• 作者: T.Yokouchi;Y.Suzaki;K.Nakagawa;et al.;村田剛史;岡見智史;小峰啓史;Takeshi Murata;Satoshi Okami;Takashi Komine;富川智史;太田篤志
• 通讯作者: 太田篤志

Potential of servo pattern printing on PMR media with high density servo signal pattern

在具有高密度伺服信号图案的 PMR 介质上进行伺服图案打印的潜力

• 发表时间: 2006
• 期刊: INTERMAG 2006 Digests
• 作者: T.Yokouchi;Y.Suzaki;K.Nakagawa;et al.;村田剛史;岡見智史;小峰啓史;Takeshi Murata;Satoshi Okami;Takashi Komine;富川智史;太田篤志;和泉昭彦;安田浩子;M.Nishikawa;A.Izumi;M.Nishikawa
• 通讯作者: M.Nishikawa