公开(公告)号：US20100079911A1

公开(公告)日：2010-04-01

申请号：US12597699

申请日：2008-04-28

申请人： Ryuji Sakaguchi ,  Gouhei Kurokawa ,  Yuzo Sasaki ,  Tatsu Komatsuda ,  Amarendra Singh

发明人： Ryuji Sakaguchi ,  Gouhei Kurokawa ,  Yuzo Sasaki ,  Tatsu Komatsuda ,  Amarendra Singh

IPC分类号： G11B5/127 ,  G11B5/66 ,  G11B5/667 ,  B05D5/12

CPC分类号： G11B5/65 ,  G11B5/66

摘要： A perpendicular magnetic recording medium is provided, which has a backing layer, a primer layer, an intermediate layer and at least one perpendicular magnetic recording layer, and is characterized in that the perpendicular magnetic recording layer contains Co and Cr, and at least one of the perpendicular magnetic recording layer or layers has a granular structure comprising ferromagnetic crystal grains and grain boundaries comprised of non-magnetic tungsten oxide. The perpendicular magnetic recording layer may be a double-layered structure comprising the tungsten oxide grain boundary-containing layer and a Cr oxide, Si oxide, Ta oxide or Ti oxide grain boundary-containing layer formed on the tungsten oxide grain boundary-containing layer. The perpendicular magnetic recording medium exhibits good perpendicular orientation and has ferromagnetic crystal grains with extremely small grain size, and thus, is superior in high recording density characteristic.

摘要翻译： 提供了一种具有背衬层，底漆层，中间层和至少一个垂直磁记录层的垂直磁记录介质，其特征在于垂直磁记录层含有Co和Cr，并且其中至少一个 垂直磁记录层具有包含铁磁晶粒和由非磁性氧化钨构成的晶界的粒状结构。 垂直磁记录层可以是包含形成在氧化钨晶界含有层上的氧化钨晶界层和在氧化钨晶界含有层上形成的Cr氧化物，氧化硅，氧化物或氧化钛晶界的层的双层结构。 垂直磁记录介质具有良好的垂直取向，并且具有极小晶粒尺寸的铁磁晶粒，因此具有优异的高记录密度特性。