公开(公告)号：US20150027877A1

公开(公告)日：2015-01-29

申请号：US14514303

申请日：2014-10-14

申请人： WD Media (Singapore) Pte. Ltd.

发明人： CHIYO SAITO ,  TOKICHIRO SATO ,  TAKENORI KAJIWARA

IPC分类号： G11B5/851 ,  G11B5/65

摘要： Provided is a method of manufacturing a magnetic disk comprising a granular magnetic recording layer which causes less noise even with a recording capacity thereof of 250 G or more bits per square inch; and a method for manufacturing the same. The magnetic disk according to the present invention comprises: a granular magnetic recording layer (20) which is formed on a disk substrate 10 directly or via an intermediate layer and which has non-magnetic regions between granular columnar particles; and an auxiliary recording layer (22) which is formed on the granular magnetic recording layer 20 and which causes exchange interaction among the granular columnar particles, wherein the auxiliary recording layer (22) contains 0.1 to 3 moles of oxygen.

摘要翻译： 提供一种制造磁盘的方法，该磁盘包括粒状磁记录层，即使其记录容量为每平方英寸250G或更多位，也会产生较少的噪声; 及其制造方法。 根据本发明的磁盘包括：粒状磁记录层（20），其直接或经由中间层形成在盘基板10上，并且在颗粒状柱状颗粒之间具有非磁性区域; 和形成在颗粒状磁记录层20上并且引起颗粒状柱状颗粒之间的交换相互作用的辅助记录层（22），其中辅助记录层（22）含有0.1至3摩尔的氧。