公开(公告)号：US20090142624A1

公开(公告)日：2009-06-04

申请号：US12325145

申请日：2008-11-29

申请人： Hideaki TAKAHOSHI ,  Hisato Shibata ,  Shinya Sato ,  Isatake Kaitsu ,  Akira Kikuchi

发明人： Hideaki TAKAHOSHI ,  Hisato Shibata ,  Shinya Sato ,  Isatake Kaitsu ,  Akira Kikuchi

IPC分类号： G11B5/706 ,  C23C14/34

CPC分类号： G11B5/7325 ,  G11B5/65 ,  G11B5/66 ,  G11B5/851

摘要： A method of producing a magnetic recording medium produces a medium having a magnetic recording layer disposed above a nonmagnetic intermediate layer, The nonmagnetic intermediate layer is formed by a sputtering using a target made of an oxide material. Oxygen gas or carbon dioxide gas is supplied during the sputtering in order to suppress a state where an oxygen supply becomes insufficient due to separation of oxygen atoms from the oxide material at a time of plasma generation.

摘要翻译： 制造磁记录介质的方法产生具有设置在非磁性中间层上方的磁记录层的介质。非磁性中间层通过使用由氧化物材料制成的靶进行溅射形成。 在溅射期间供给氧气或二氧化碳气体，以便抑制在等离子体产生时由于氧原子与氧化物材料的分离导致供氧不足的状态。

公开(公告)号：US20090183985A1

公开(公告)日：2009-07-23

申请号：US12355279

申请日：2009-01-16

申请人： Yuki YOSHIDA ,  Hideaki TAKAHOSHI ,  Shinya SATO ,  Isatake KAITSU ,  Akira KIKUCHI ,  Jun TAGUCHI ,  Ryo KURITA

发明人： Yuki YOSHIDA ,  Hideaki TAKAHOSHI ,  Shinya SATO ,  Isatake KAITSU ,  Akira KIKUCHI ,  Jun TAGUCHI ,  Ryo KURITA

IPC分类号： C23C14/34

CPC分类号： G11B5/667 ,  B82Y25/00 ,  C23C14/3414 ,  G11B5/65 ,  G11B5/7325 ,  G11B5/851 ,  H01F10/007 ,  H01F41/18

摘要： One aspect of the embodiments utilizes, according to an aspect of the invention, a method of manufacturing a magnetic recording medium, which includes an intermediate layer and a granular magnetic layer as a recording layer sequentially formed on a non-magnetic substrate, includes the steps of forming the intermediate layer and forming the granular magnetic layer. The granular magnetic layer includes a plurality of magnetic particles made of a Co alloy and an oxide magnetically separating the plurality of magnetic particles by a sputtering method using a target. The target includes a Co alloy, one or more first oxides selected from a group of oxides of Si, Ti, Ta, Cr, W, and Nb, and a second oxide composed of a Co oxide.

摘要翻译： 实施例的一个方面利用根据本发明的一个方面的制造磁记录介质的方法，该方法包括中间层和作为依次形成在非磁性基底上的记录层的粒状磁性层，包括步骤 形成中间层并形成粒状磁性层。 颗粒状磁性层包括多个由Co合金制成的磁性颗粒和通过使用靶的溅射法磁性分离多个磁性颗粒的氧化物。 靶包括Co合金，选自Si，Ti，Ta，Cr，W和Nb的氧化物中的一种或多种第一氧化物和由Co氧化物构成的第二氧化物。

公开(公告)号：US20120050914A1

公开(公告)日：2012-03-01

申请号：US13214855

申请日：2011-08-22

申请人： Hideaki TAKAHOSHI ,  Takahiro UKAI

发明人： Hideaki TAKAHOSHI ,  Takahiro UKAI

IPC分类号： G11B5/667 ,  G11B5/127

CPC分类号： G11B5/7325

摘要： A perpendicular magnetic recording medium that is excellent in terms of electromagnetic conversion characteristics and can achieve the demand for the recording density growth, and a magnetic recording and reproducing apparatus provided with the perpendicular magnetic recording medium are provided. The perpendicular magnetic recording medium has at least a backing layer, an underlayer, an intermediate layer, and a perpendicular magnetic recording layer sequentially laminated on a non-magnetic substrate, in which the backing layer includes at least a soft magnetic film having an amorphous structure; the underlayer includes a first underlayer and a second underlayer laminated from the non-magnetic substrate side; the first underlayer is an fcc-structured alloy layer including an fcc-structured element and a bcc-structured element, the second underlayer includes a NiW alloy; and the intermediate layer includes Ru or a Ru alloy.

摘要翻译： 提供了在电磁转换特性方面优异并且可以实现对记录密度增长的需求的垂直磁记录介质，以及设置有垂直磁记录介质的磁记录和重放装置。 垂直磁记录介质至少具有背衬层，底层，中间层和垂直磁记录层，其顺序层压在非磁性基板上，其中背衬层至少包括具有非晶结构的软磁膜 ; 所述底层包括从所述非磁性基板侧层叠的第一底层和第二下层; 第一底层是包含fcc结构的元素和bcc结构的元素的fcc结构的合金层，第二底层包括NiW合金; 并且中间层包括Ru或Ru合金。