公开(公告)号：US20110268990A1

公开(公告)日：2011-11-03

申请号：US13096307

申请日：2011-04-28

申请人： Teiichiro UMEZAWA

发明人： Teiichiro UMEZAWA

IPC分类号： G11B5/00

CPC分类号： G11B5/82 ,  G11B5/656 ,  G11B5/66

摘要： An object of the present invention is to achieve thinning of an auxiliary recording layer while maintaining the function thereof to improve SNR.A representative configuration of a perpendicular magnetic disk according to the present invention includes, on abase, a granular magnetic layer 160, and a auxiliary recording layer 180 disposed as an upper layer of the granular magnetic layer 160, wherein the granular magnetic layer 160 has a granular structure in which a grain boundary portion is formed by segregation of a non-magnetic substance containing an oxide as a main component around magnetic particles containing a CoCrPt alloy grown in a columnar shape as a main component, and the auxiliary recording layer 180 contains a CoCrPtRu alloy as a main component and has a film thickness of 1.5 nm to 4.0 nm.

摘要翻译： 本发明的目的在于实现辅助记录层的薄化，同时保持其功能以提高SNR。 根据本发明的垂直磁盘的代表性配置包括粒状磁性层160和作为粒状磁性层160的上层设置的辅助记录层180，其中粒状磁性层160具有 颗粒结构，其中通过以包含以柱状形式生长的CoCrPt合金为主要成分的磁性颗粒的周围以包含以氧化物为主要成分的非磁性物质的偏析形成晶界部分，并且辅助记录层180含有 CoCrPtRu合金为主成分，膜厚为1.5nm〜4.0nm。

公开(公告)号：US20080090104A1

公开(公告)日：2008-04-17

申请号：US11862789

申请日：2007-09-27

申请人： Yoshiaki SONOBE ,  Teiichiro UMEZAWA ,  Koichi WAGO

发明人： Yoshiaki SONOBE ,  Teiichiro UMEZAWA ,  Koichi WAGO

IPC分类号： G11B5/33 ,  B05D5/12

CPC分类号： G11B5/82 ,  B82Y10/00 ,  G11B5/66 ,  G11B5/743 ,  G11B5/855 ,  G11B2005/0029

摘要： A magnetic recording medium for perpendicular magnetic recording includes a substrate, a granular layer having magnetic crystal grains exhibiting perpendicular magnetic anisotropy and nonmagnetic substances for magnetically separating the magnetic crystal grains from each other at grain boundaries of the magnetic crystal grains, and a continuous film layer having magnetic grains to be exchange-coupled to the magnetic crystal grains, the grain boundary width of the magnetic grains being smaller than that of the magnetic crystal grains, wherein separation regions for magnetically separating tracks from each other are disposed in regions between the tracks of the magnetic recording medium in at least the continuous film layer.

摘要翻译： 用于垂直磁记录的磁记录介质包括基板，具有垂直磁各向异性的磁性晶粒的颗粒层和用于在磁晶粒的晶界处磁性分离磁晶粒的非磁性物质，以及连续的膜层 具有与磁性晶粒交换耦合的磁性颗粒，磁性颗粒的晶界宽度小于磁性晶粒的晶界宽度，其中将磁道彼此分离磁道的分离区域设置在 所述磁记录介质至少在所述连续膜层中。

公开(公告)号：US20080075845A1

公开(公告)日：2008-03-27

申请号：US11862410

申请日：2007-09-27

申请人： Yoshiaki SONOBE ,  Teiichiro UMEZAWA ,  Koichi WAGO

发明人： Yoshiaki SONOBE ,  Teiichiro UMEZAWA ,  Koichi WAGO

IPC分类号： G11B5/84

CPC分类号： G11B5/66 ,  G11B5/84

摘要： A method for manufacturing a magnetic recording medium includes the steps of (a) forming a perpendicular magnetic recording layer and (b) applying an ion beam to regions between tracks of the perpendicular magnetic recording layer so as to form separation regions for magnetically separating the tracks from each other. In the step (a), a continuous film layer composed of a multilayer film is formed, and CoB layers and Pd layers are laminated in the multilayer film. In the step (b), the CoB layers and the Pd layers are melted by the ion beam so as to form an alloy of metals contained in the CoB layers and the Pd layers to thereby form the separation regions.

摘要翻译： 一种制造磁记录介质的方法包括以下步骤：（a）形成垂直磁记录层，和（b）将离子束施加到垂直磁记录层的轨道之间的区域，以便形成用于磁分离轨道的分离区域 从彼此。 在步骤（a）中，形成由多层膜构成的连续膜层，并且在多层膜中层叠CoB层和Pd层。 在步骤（b）中，CoB层和Pd层通过离子束熔化，以形成CoB层和Pd层中所含的金属的合金，从而形成分离区域。