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1. 发明申请

WO2007010908A1 MAGNETIC RECORDING MEDIUM, PRODUCTION PROCESS THEREOF, AND MAGNETIC RECORDING AND REPRODUCING APPARATUS 审中-公开
标题翻译：磁记录介质，其生产过程及磁记录和再现装置
公开(公告)号：WO2007010908A1
公开(公告)日：2007-01-25
申请号：PCT/JP2006/314197
申请日：2006-07-12
申请人： SHOWA DENKO K.K. , FUKUSHIMA, Masato , MURAKAMI, Yuji , SHIMIZU, Kenji
发明人： FUKUSHIMA, Masato , MURAKAMI, Yuji , SHIMIZU, Kenji
IPC分类号： G11B5/667 , G11B5/73 , G11B5/738 , G11B5/84
CPC分类号： G11B5/8404 , G11B5/667
摘要： The present invention provides a magnetic recording medium which enables improvement of the layer quality of magnetic layer grown on the surface of a soft magnetic underlayer by conducting excellent control of crystal orientation by imparting an optimal half-width of the Rocking curve (Δθ50), as well as obtainment of SNR that suppresses generation of TA and enables realization of high-density recording. The magnetic recording medium includes a soft magnetic underlayer, an orientation control layer, a perpendicular magnetic recording layer, and a protective layer, which are disposed on top of a nonmagnetic substrate; wherein the magnetic anisotropy ratio (Hmr/Hmc) of the soft magnetic underlayer is 1 or less, and Δθ50 is 1 to 6 degrees. The soft magnetic underlayer is formed on the primary surface of the non- magnetic substrate where the primary surface has been polished one substrate at a time by a sheet-type texture processing device using polishing tape and a slurry containing colloidal silica abrasive grain.
摘要翻译：本发明提供一种磁记录介质，其通过赋予摇摆曲线的最佳半值（Δ50）来实现对晶体取向的优异控制，从而提高在软磁性底层表面上生长的磁性层的层质量，，以及获得抑制TA产生的SNR并且能够实现高密度记录。磁记录介质包括设置在非磁性基板顶部的软磁性底层，取向控制层，垂直磁记录层和保护层; 其中软磁性底层的磁各向异性比（Hmr / Hmc）为1以下，Δε50为1〜6度。在非磁性基材的主表面上，通过利用研磨带的片状组织处理装置和含有胶体二氧化硅磨粒的浆料，一次将基材表面一次抛光，形成软磁性底层。

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