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1. 发明申请

WO2005093719A1 PERPENDICULAR MAGNETIC RECORDING MEDIUM USING SOFT MAGNETIC LAYER WHICH SUPPRESSES NOISE GENERATION, AND PERPENDICULAR MAGNETIC RECORDING APPARATUS THEREWITH 审中-公开
标题翻译：使用软磁体层抑制噪声产生的全磁性记录介质，及其周期性磁记录装置
公开(公告)号：WO2005093719A1
公开(公告)日：2005-10-06
申请号：PCT/JP2005/006228
申请日：2005-03-24
申请人： KABUSHIKI KAISHA TOSHIBA , SHOWA DENKO K.K. , NAKAMURA, Futoshi , TANAKA, Tsutomu , AOYAGI, Yuka , SHIMIZU, Kenji , SAKAI, Hiroshi , SAKAWAKI, Akira
发明人： NAKAMURA, Futoshi , TANAKA, Tsutomu , AOYAGI, Yuka , SHIMIZU, Kenji , SAKAI, Hiroshi , SAKAWAKI, Akira
IPC分类号： G11B5/667
CPC分类号： G11B5/66 , B82Y25/00 , G11B5/667 , H01F10/08 , H01F10/3222
摘要： The magnetic recording medium of the present invention has a substrate, a perpendicular magnetic recording layer, and a soft magnetic layer formed therebetween, having a thickness of less than 100 nm, the soft magnetic layer having a magnetic anisotropy in a surface direction, and product Bs Hc, which is a production of a saturation magnetic flux density Bs and a coercive force Hc, of not less than 79 T Aim (10 kG Oe). By making the thickness of the soft magnetic layer into the above-mentioned range, the magnetic anisotropy in surface direction can be stabilized. magnetostatic energy can be increased sufficiently by making the Bs • He the above-mentioned range. Therefore, generating of the magnetic wall in the soft magnetic layer can be suppressed, the noise generating from the soft magnetic layer can be suppressed, and a high-density recording is enabled.
摘要翻译：本发明的磁记录介质具有厚度小于100nm的基板，垂直磁记录层和形成在其间的软磁层，软磁层在表面方向上具有磁各向异性，产品 BsHc，其为饱和磁通密度Bs和矫顽力Hc的不小于79T目标（10kGOe）的产生。通过使软磁性层的厚度达到上述范围，可以使表面方向的磁各向异性稳定。可以通过使Bs充分增加静磁能。他上述范围。因此，可以抑制软磁层中的磁壁的产生，能够抑制从软磁性层产生的噪声，能够实现高密度记录。

2. 发明申请

WO2005031713A1 PERPENDICULAR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING/REPRODUCING APPARATUS 审中-公开
标题翻译：全能磁记录介质和磁记录/再现装置
公开(公告)号：WO2005031713A1
公开(公告)日：2005-04-07
申请号：PCT/JP2004/014300
申请日：2004-09-22
申请人： KABUSHIKI KAISHA TOSHIBA , SHOWA DENKO K.K , IWASAKI, Takeshi , NAKAMURA, Futoshi , OIKAWA, Soichi , MAEDA, Tomoyuki , SAKAI, Hiroshi , SAKAWAKI, Akira , SHIMIZU, Kenji
发明人： IWASAKI, Takeshi , NAKAMURA, Futoshi , OIKAWA, Soichi , MAEDA, Tomoyuki , SAKAI, Hiroshi , SAKAWAKI, Akira , SHIMIZU, Kenji
IPC分类号： G11B5/65
CPC分类号： G11B5/65 , G11B5/656 , G11B5/667 , G11B5/732 , G11B5/7325
摘要： To make possible high density recording by making the structure of the perpendicular magnetic recording layer finer. A perpendicular magnetic recording medium 10 includes at least a nonmagnetic under layer 2, a perpendicular magnetic layer 3, and a protective layer which are stacked on a nonmagnetic substrate 1, wherein the perpendicular magnetic layer includes ferromagnetic crystal grains and nonmagnetic crystal grain boundary regions, wherein the crystal grain boundary region includes at least two kinds of oxide.
摘要翻译：通过使垂直磁记录层的结构更细，可以实现高密度记录。垂直磁记录介质10至少包括层叠在非磁性基板1上的非磁性底层2，垂直磁性层3和保护层，其中垂直磁性层包括铁磁晶粒和非磁性晶粒边界区域，其中所述晶界区包括至少两种氧化物。

3. 发明申请

WO2004064048A2 MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING THEREFOR, AND MAGNETIC READ/WRITE APPARATUS 审中-公开
标题翻译：磁记录介质，其制造方法和磁读取装置
公开(公告)号：WO2004064048A2
公开(公告)日：2004-07-29
申请号：PCT/JP2004/000205
申请日：2004-01-14
申请人： SHOWA DENKO K.K. , KABUSHIKI KAISHA TOSHIBA , SHIMIZU, Kenji , SAKAWAKI, Akira , KOBAYASHI, Kazuo , NGUYEN, Tien, Duong , SAKAI, Hiroshi , HIKOSAKA, Takashi , OIKAWA, Soichi , MAEDA, Tomoyuki , NAKAMURA, Futoshi
发明人： SHIMIZU, Kenji , SAKAWAKI, Akira , KOBAYASHI, Kazuo , NGUYEN, Tien, Duong , SAKAI, Hiroshi , HIKOSAKA, Takashi , OIKAWA, Soichi , MAEDA, Tomoyuki , NAKAMURA, Futoshi
IPC分类号： G11B5/64
CPC分类号： G11B5/667 , G11B5/65 , G11B5/656 , G11B5/7325 , G11B5/8404
摘要： A soft magnetic undercoat film, a first undercoat film, a second undercoat film, a perpendicular magnetic recording film, and a protective film are provided on a non-magnetic substrate, and the first undercoat film consists of Pt, Pd, or an alloy including at least one among these, and the second undercoat film consists of Ru or an Ru alloy.
摘要翻译：在非磁性基板上设置软磁性底涂层，第一底涂膜，第二底涂膜，垂直磁记录膜和保护膜，第一底涂层由Pt，Pd或包含其中至少一个，第二底涂膜由Ru或Ru合金组成。

4. 发明申请

WO2005064597A1 MAGNETIC RECORDING MEDIUM, MANUFACTURING METHOD FOR THE MAGNETIC RECORDING MEDIUM, AND MAGNETIC READ/WRITE APPARATUS 审中-公开
标题翻译：磁记录介质，磁记录介质的制造方法和磁读/写装置
公开(公告)号：WO2005064597A1
公开(公告)日：2005-07-14
申请号：PCT/JP2004/019781
申请日：2004-12-24
申请人： KABUSHIKI KAISHA TOSHIBA , SHOWA DENKO K.K. , MAEDA, Tomoyuki , OIKAWA, Soichi , IWASAKI, Takeshi , NAKAMURA, Futoshi , SAKAI, Hiroshi , SAKAWAKI, Akira , SHIMIZU, Kenji
发明人： MAEDA, Tomoyuki , OIKAWA, Soichi , IWASAKI, Takeshi , NAKAMURA, Futoshi , SAKAI, Hiroshi , SAKAWAKI, Akira , SHIMIZU, Kenji
IPC分类号： G11B5/65
CPC分类号： G11B5/7325 , C23C14/0688 , C23C14/185 , G11B5/65 , G11B5/656 , G11B5/712 , G11B5/85
摘要： A magnetic recording medium 62 wherein a substrate 11, undercoating layers 13 and 14 formed on the substrate 11, and a magnetic recording layer 15, which include the magnetic crystal grain and the grain boundary field which encloses magnetic crystal grains, are included. The grain boundary field includes Ti oxide, and the ratio of the substance amount of the Ti oxide in the magnetic recording layer 15 is 5 mol % or more and 15 mol % or less, and the Ti oxide includes at least TiO and/or Ti 2 O 3 s.
摘要翻译：包括其中衬底11，形成在衬底11上的底涂层13和14以及磁记录层15的磁记录介质62和磁记录层15，磁记录层15包括磁晶粒和包围磁晶粒的晶界。晶界包括Ti氧化物，磁记录层15中的Ti氧化物的物质的比例为5摩尔％以上且15摩尔％以下，Ti氧化物至少包含TiO和/或Ti 2 O 3 。

5. 发明申请

WO2005034095A1 PERPENDICULAR MAGNETIC RECORDING MEDIUM, MANUFACTURING METHOD THEREFOR, AND MAGNETIC READ/WRITE APPARATUS USING THE SAME 审中-公开
标题翻译：全磁磁记录介质，其制造方法及使用其的磁读取/写入装置
公开(公告)号：WO2005034095A1
公开(公告)日：2005-04-14
申请号：PCT/JP2004/015007
申请日：2004-10-05
申请人： KABUSHIKI KAISHA TOSHIBA , SHOWA DENKO K.K , MAEDA, Tomoyuki , OIKAWA, Soichi , IWASAKI, Takeshi , NAKAMURA, Futoshi , SAKAI, Hiroshi , SHIMIZU, Kenji , SAKAWAKI, Akira
发明人： MAEDA, Tomoyuki , OIKAWA, Soichi , IWASAKI, Takeshi , NAKAMURA, Futoshi , SAKAI, Hiroshi , SHIMIZU, Kenji , SAKAWAKI, Akira
IPC分类号： G11B5/65
CPC分类号： G11B5/7325 , G11B5/65 , G11B5/656
摘要： A perpendicular magnetic recording medium includes: a substrate; at least one underlayer formed above the substrate; and a perpendicular magnetic recording layer formed above the at least one underlayer, an easy magnetization axis of the perpendicular magnetic recording layer being oriented perpendicular to the substrate, the perpendicular magnetic recording layer including magnetic crystal particles and grain boundaries surrounding the magnetic crystal particles, wherein the grain boundaries contain an oxide of silicon and at least one element selected from the group consisting of Li, Na, K, Rb, Cs, Ca, Sr, and Ba, and the ratio of a total amount of substance of Si, Li, Na, K, Rb, Cs, Ca, Sr, and Ba in the perpendicular magnetic recording layer is no less than 1 mol% and no more than 20 mol%.
摘要翻译：垂直磁记录介质包括：基板; 至少一个底层形成在所述基底上; 以及形成在所述至少一个底层上方的垂直磁记录层，所述垂直磁记录层的容易磁化轴垂直于所述衬底取向，所述垂直磁记录层包括磁性结晶颗粒和包围所述磁性结晶颗粒的晶界，其中晶界包含硅的氧化物和选自Li，Na，K，Rb，Cs，Ca，Sr和Ba中的至少一种元素，并且Si，Li，垂直磁记录层中的Na，K，Rb，Cs，Ca，Sr和Ba不小于1mol％且不大于20mol％。

6. 发明申请

WO2005006310A1 MAGNETIC RECORDING MEDIUM USING GRAIN ISOLATION TYPE FILM AS UNDER LAYER, METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING/REPRODUCING APPARATUS USING THE SAME 审中-公开
标题翻译：使用颗粒分离型膜的磁记录介质，其制造方法，以及使用其的磁记录/再现装置
公开(公告)号：WO2005006310A1
公开(公告)日：2005-01-20
申请号：PCT/JP2004/010271
申请日：2004-07-13
申请人： KABUSHIKI KAISHA TOSHIBA , SHOWA DENKO K.K , NAKAMURA, Futoshi , OIKAWA, Soichi , IWASAKI, Takeshi , MAEDA, Tomoyuki , SHIMIZU, Kenji , SAKAI, Hiroshi
发明人： NAKAMURA, Futoshi , OIKAWA, Soichi , IWASAKI, Takeshi , MAEDA, Tomoyuki , SHIMIZU, Kenji , SAKAI, Hiroshi
IPC分类号： G11B5/66
CPC分类号： G11B5/732 , G11B5/656 , G11B5/667 , G11B5/7325
摘要： To provide a magnetic recording medium having a magnetic recording layer consisting of fine crystal grains with improved orientation. The soft magnetic layer 3, the seed layer 4, the under layer 5 and the magnetic recording layer 7 are formed successively on the non-magnetic substrate 1, wherein the seed layer 4 is made of a material containing Ni, the under layer 5 has a grain isolation type structure in which grains made of a non-magnetic material are isolated in a non-magnetic matrix and the non-magnetic matrix is made of a material containing Y 2 0 3 . With this constitution, the under layer 5 has improved characteristics in terms of uniformity of grains, sharpness of grain boundary, fineness of the grains and crystal orientation, and therefore the magnetic recording layer 7 that is formed on the under layer also has improved characteristics in terms of uniformity of grains, sharpness of grain boundary, fineness of the grains and crystal orientation. As a result, medium noise and coercive force are improved, thus making high density recording possible.
摘要翻译：提供一种具有由具有改进的取向的细晶粒构成的磁记录层的磁记录介质。软磁性层3，种子层4，底层5和磁记录层7依次形成在非磁性基板1上，其中种子层4由含有Ni的材料制成，底层5具有其中由非磁性材料制成的颗粒在非磁性基质中分离并且非磁性基质由含有Y 2 O 3的材料制成的颗粒隔离型结构。利用这种结构，底层5在晶粒均匀性，晶界锐度，晶粒细度和晶体取向方面具有改进的特性，因此形成在下层上的磁记录层7也具有改善的特性晶粒均匀度，晶界锐度，晶粒细度和晶体取向等。结果，中等噪声和矫顽力得到改善，从而使得高密度记录成为可能。

7. 发明申请

WO2004090874A1 MAGNETIC RECORDING MEDIUM, METHOD FOR PRODUCING THEREOF, AND MAGNETIC RECORDING AND REPRODUCING APPARATUS. 审中-公开
标题翻译：磁记录介质，其制造方法以及磁记录和再现装置。
公开(公告)号：WO2004090874A1
公开(公告)日：2004-10-21
申请号：PCT/JP2004/004994
申请日：2004-04-07
申请人： SHOWA DENKO K. K. , KABUSHIKI KAISHA TOSHIBA , SAKAWAKI, Akira , SHIMIZU, Kenji , KOBAYASHI, Kazuo , SAKAI, Hiroshi , OIKAWA, Soichi , IWASAKI, Takeshi , MAEDA, Tomoyuki , NAKAMURA, Futoshi
发明人： SAKAWAKI, Akira , SHIMIZU, Kenji , KOBAYASHI, Kazuo , SAKAI, Hiroshi , OIKAWA, Soichi , IWASAKI, Takeshi , MAEDA, Tomoyuki , NAKAMURA, Futoshi
IPC分类号： G11B5/66
CPC分类号： G11B5/656 , G11B5/65 , G11B5/66
摘要： A magnetic recording medium which is provided on a nonmagnetic substrate 1 with at least an orientation-controlling layer 3 for controlling the orientation of a layer formed directly thereon, a perpendicularly magnetic layer 4 having an easily magnetizing axis oriented mainly perpendicularly relative to the nonmagnetic substrate 1, and a protective layer 5 and characterized in that the perpendicularly magnetic layer 4 includes two or more magnetic layers, that at least one of the magnetic layers is a layer 4a having Co as a main component and containing Pt as well and containing an oxide and that at least another of the magnetic layers is a layer 4b having Co as a main component and containing Cr as well and containing no oxide.
摘要翻译：一种磁性记录介质，其设置在至少具有用于控制直接形成的层的取向的取向控制层3的非磁性基板1上，具有相对于非磁性基板主要垂直取向的易磁化轴的垂直磁性层4 1和保护层5，其特征在于，垂直磁性层4包括两个或多个磁性层，至少一个磁性层是具有Co作为主要成分并且含有Pt并且含有氧化物的层4a 并且至少另一个磁性层是具有Co作为主要成分并且含有Cr并且不含氧化物的层4b。

8. 发明申请

WO2007074585A1 MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING DEVICE USING THE MAGNETIC RECORDING MEDIUM 审中-公开
标题翻译：使用磁记录介质的磁记录介质和磁记录和再现装置
公开(公告)号：WO2007074585A1
公开(公告)日：2007-07-05
申请号：PCT/JP2006/322415
申请日：2006-11-02
申请人： SHOWA DENKO K.K. , SHIMIZU, Kenji
发明人： SHIMIZU, Kenji
IPC分类号： G11B5/667 , G11B5/738
CPC分类号： G11B5/667
摘要： A magnetic recording medium A is provided on a non-magnetic substrate 1 with at least a soft under layer a, an under film 5, an intermediate film 6 and a perpendicular magnetic recording film 7. The soft under layer a is a soft magnetic film having an amorphous structure. The under film 5 is formed of an Ni-W alloy. The intermediate film 6 is formed of an Ru alloy. In the Ni-W alloy, the Ni content is 80 atom % or more, and the W content is 20 atom % or less and preferably in the range of 1 atom % to 12 atom %. A magnetic recording and reproducing device 12 equipped with the magnetic recording medium A is excellent in productivity and capable of recording and reproducing information of high density.
摘要翻译：磁性记录介质A设置在至少具有软底层a，底膜5，中间膜6和垂直磁记录膜7的非磁性基板1上。软底层a是软磁膜具有无定形结构。底膜5由Ni-W合金形成。中间膜6由Ru合金形成。在Ni-W合金中，Ni含量为80原子％以上，W含量为20原子％以下，优选为1原子％〜12原子％的范围。装备有磁记录介质A的磁记录和再现装置12的生产率优良，能够记录和再现高密度的信息。

9. 发明申请

WO2006090510A1 MAGNETIC RECORDING MEDIUM, PRODUCTION METHOD THEREOF, AND MAGNETIC RECORDING AND REPRODUCING APPARATUS 审中-公开
标题翻译：磁记录介质，其制作方法及磁记录和再现装置
公开(公告)号：WO2006090510A1
公开(公告)日：2006-08-31
申请号：PCT/JP2005/020159
申请日：2005-10-27
申请人： SHOWA DENKO K.K. , OSAWA, Hiroshi , SHIMIZU, Kenji
发明人： OSAWA, Hiroshi , SHIMIZU, Kenji
IPC分类号： G11B5/738 , G11B5/64 , G11B5/65 , G11B5/73 , G11B5/851
CPC分类号： G11B5/7325 , G11B5/656 , G11B5/66
摘要： In a magnetic recording medium which is able to cope with a higher recording density, there is provided a magnetic recording medium which has a higher coercive force and a lower noise, a production method thereof, and a magnetic recording and reproducing apparatus. The magnetic recording medium is characterized in that at least a nonmagnetic undercoat layer, a nonmagnetic intermediate layer, a magnetic layer, and a protective layer are laminated in this order on a nonmagnetic substrate, and at least one of the layers of the nonmagnetic undercoat layer is constituted by a WV type multicomponent body-centered cubic crystal alloy.
摘要翻译：在能够应付较高记录密度的磁记录介质中，提供了具有较高矫顽力和较低噪声的磁记录介质，其制备方法和磁记录和再现装置。磁记录介质的特征在于至少在非磁性基板上层叠至少非磁性底涂层，非磁性中间层，磁性层和保护层，并且至少一层非磁性底涂层由WV型多组分体心立方晶体合金构成。

10. 发明申请

WO2007074913A1 MAGENTIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING DEVICE 审中-公开
标题翻译：磁记录介质和磁记录和再现装置
公开(公告)号：WO2007074913A1
公开(公告)日：2007-07-05
申请号：PCT/JP2006/326305
申请日：2006-12-22
申请人： SHOWA DENKO K.K. , SHIMIZU, Kenji
发明人： SHIMIZU, Kenji
IPC分类号： G11B5/667 , G11B5/738
CPC分类号： G11B5/667
摘要： The present invention has its object to offer magnetic recording medium and magnetic recording and reproducing device that can record and reproduce high density data by optimizing the soft magnetic layer material forming the soft magnetic underlayer and the under layer material. In the present invention, the perpendicular magnetic recording medium A has at least the soft magnetic underlayer a, the under layer 5, the intermediate layer 6 and the perpendicular magnetic recording layer on the non-magnetic substrate 1. The soft magnetic layers 2, 4 that form the soft magnetic underlayer a, has an amorphous structure and is made of CoA1 alloy or CoFeA1 alloy having saturation magnetic flux density Bs greater than 1.1T.
摘要翻译：本发明的目的是提供磁记录介质和磁记录和再现装置，其可以通过优化形成软磁性底层和下层材料的软磁层材料来记录和再现高密度数据。在本发明中，垂直磁记录介质A至少在非磁性基板1上具有软磁性层a，下层5，中间层6和垂直磁记录层。软磁性层2,4 形成软磁性底层a具有非晶结构，并且由具有大于1.1T的饱和磁通密度Bs的CoAl合金或CoFeAl合金制成。

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