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1. 发明授权

US06815097B2 Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：US06815097B2
公开(公告)日：2004-11-09
申请号：US10078659
申请日：2002-02-21
申请人： Toshihiko Yoshikawa , Akira Sakawaki , Hiroshi Sakai
发明人： Toshihiko Yoshikawa , Akira Sakawaki , Hiroshi Sakai
IPC分类号： G11B566
CPC分类号： G11B5/667 , G11B5/656 , G11B5/66 , G11B5/7325 , Y10S428/90 , Y10T428/265
摘要： A magnetic recording medium comprising a non-magnetic substrate having thereon a non-magnetic underlayer, a magnetic recording layer, a soft magnetic layer and a protective layer, wherein the coercivity is 2,500 Oe or more and the thickness of the soft magnetic layer is from 5 to 50 Å.
摘要翻译：一种磁记录介质，包括其上具有非磁性底层，磁记录层，软磁性层和保护层的非磁性基板，其中矫顽力为2500Oe以上，软磁性层的厚度为 5至50埃。

2. 发明授权

US06274233B1 Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US06274233B1
公开(公告)日：2001-08-14
申请号：US09276466
申请日：1999-03-25
申请人： Toshihiko Yoshikawa , Akira Sakawaki , Hiroshi Sakai , Tetsuya Osaka
发明人： Toshihiko Yoshikawa , Akira Sakawaki , Hiroshi Sakai , Tetsuya Osaka
IPC分类号： G11B566
CPC分类号： G11B5/66 , Y10S428/90 , Y10T428/26 , Y10T428/265
摘要： A magnetic recording medium comprising a substrate 1 having thereon an in-plane magnetic film 3 having a magnetic easy axis oriented in the in-plane direction with respect to the substrate and a vertical magnetic film 6 having a magnetic easy axis oriented perpendicularly to the substrate. The in-plane magnetic film 3 is disposed closer to the substrate 1 than the vertical magnetic film 6. In preferred embodiments, the magnetic recording medium may further comprise a separation film 4 disposed between the in-plane magnetic film 3 and the vertical magnetic film 6, a nonmagnetic intermediate layer 5 having an hcp structure disposed between the separation film 4 and the vertical magnetic film 6, and a protective film 7. The magnetic recording medium is adapted for use with a signal processing system generally used for in-plane magnetic recording media without modification of the signal processing system.
摘要翻译：一种磁记录介质，包括基板1，其上具有面向磁性薄膜3的平面磁性薄膜3，所述平面磁性薄膜3具有相对于基板在面内方向上定向的易磁化轴;垂直磁性膜6具有垂直于基板的易磁化轴。面内磁性膜3比垂直磁性膜6更靠近基板1.在优选实施例中，磁记录介质还可以包括设置在平面内的磁性膜3和垂直磁性膜之间的分离膜4 如图6所示，具有设置在分离膜4和垂直磁性膜6之间的hcp结构的非磁性中间层5和保护膜7.磁记录介质适用于通常用于面内磁性的信号处理系统记录介质而不修改信号处理系统。

3. 发明授权

US07252896B2 Magnetic recording medium and magnetic recording/reproducing apparatus 有权
标题翻译：磁记录介质和磁记录/再现装置
公开(公告)号：US07252896B2
公开(公告)日：2007-08-07
申请号：US10788259
申请日：2004-02-27
申请人： Futoshi Nakamura , Takashi Hikosaka , Soichi Oikawa , Takeshi Iwasaki , Tomoyuki Maeda , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
发明人： Futoshi Nakamura , Takashi Hikosaka , Soichi Oikawa , Takeshi Iwasaki , Tomoyuki Maeda , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
IPC分类号： G11B5/66
CPC分类号： G11B5/732 , G11B5/667 , G11B5/7325
摘要： An orientation control layer having a granular structure is formed between a substrate and magnetic recording layer, contains a base material and grains dispersed in the base material, and having a thickness smaller than a grain size of the grains.
摘要翻译：具有颗粒结构的取向控制层形成在基板和磁记录层之间，包含分散在基材中的基材和颗粒，其厚度小于晶粒的晶粒尺寸。

4. 发明申请

US20060204791A1 Magnetic recording medium, method for producing thereof, and magnetic recording and reproducing apparatus 有权
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：US20060204791A1
公开(公告)日：2006-09-14
申请号：US10552445
申请日：2004-04-07
申请人： Akira Sakawaki , Kenji Shimizu , Kazuo Kobayashi , Hiroshi Sakai , Soichi Oikawa , Takeshi Iwasaki , Tomoyuki Maeda , Futoshi Nakamura
发明人： Akira Sakawaki , Kenji Shimizu , Kazuo Kobayashi , Hiroshi Sakai , Soichi Oikawa , Takeshi Iwasaki , Tomoyuki Maeda , Futoshi Nakamura
IPC分类号： G11B5/66 , B05D5/12
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包括两个或更多个磁性层，至少一个磁性层是具有Co作为主要成分并且含有Pt的层4a，并且含有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。

5. 发明授权

US07083870B2 Magnetic recording medium, method of manufacturing the same, and magnetic recording and reproduction apparatus 失效
标题翻译：磁记录媒体及其制造方法以及磁记录再生装置
公开(公告)号：US07083870B2
公开(公告)日：2006-08-01
申请号：US10617822
申请日：2003-07-14
申请人： Kenji Shimizu , Akira Sakawaki , Hiroshi Sakai , Takashi Hikosaka , Takeshi Iwasaki
发明人： Kenji Shimizu , Akira Sakawaki , Hiroshi Sakai , Takashi Hikosaka , Takeshi Iwasaki
IPC分类号： G11B5/66 , G11B5/70
CPC分类号： G11B5/667 , G11B5/65 , G11B5/7325 , G11B2005/0029
摘要： A magnetic recording medium includes a nonmagnetic substrate on which is provided at least a soft magnetic under-film, an orientation control film that controls an orientation of a film directly above, a perpendicular magnetic recording film having an axis of easy magnetization oriented to be mainly perpendicular to the substrate and a protective film, wherein the orientation control film has a material composition forming a C11b structure. The magnetic recording medium is manufactured by a method including carrying out, in order, at least a step of forming a soft magnetic under-film on a nonmagnetic substrate, a step of forming an orientation control film that controls an orientation of a film directly above, a step of forming a perpendicular magnetic recording film having an axis of easy magnetization oriented to be mainly perpendicular to the substrate, and a step of forming a protective film. A magnetic recording and reproduction apparatus includes the magnetic recording medium and a magnetic head that records and reproduces information on the magnetic recording medium, wherein the magnetic head is a magnetic monopole head.
摘要翻译：磁记录介质包括至少设置有软磁性底膜的非磁性基板，控制正上方的膜的取向的取向控制膜，具有容易磁化的轴的垂直磁记录膜主要取向为垂直于基底和保护膜，其中取向控制膜具有形成C 11 B 17结构的材料组合物。该磁记录介质是通过以下方法制造的，该方法包括以下步骤：至少在非磁性基板上形成软磁性底膜的步骤，形成控制膜直接定向的取向控制膜的步骤形成具有易于磁化的轴取向为主要垂直于基板的垂直磁记录膜的步骤和形成保护膜的步骤。磁记录和再现装置包括磁记录介质和在磁记录介质上记录和再现信息的磁头，其中磁头是磁单极头。

6. 发明授权

US07056606B2 Magnetic recording medium, method manufacture therefor, and apparatus for magnetic reproducing and reproducing recordings 有权
标题翻译：磁记录介质及其制造方法以及用于磁再现和再现记录的设备
公开(公告)号：US07056606B2
公开(公告)日：2006-06-06
申请号：US10781906
申请日：2004-02-20
申请人： Kenji Shimizu , Akira Sakawaki , Hiroshi Sakai , Takashi Hikosaka , Soichi Oikawa
发明人： Kenji Shimizu , Akira Sakawaki , Hiroshi Sakai , Takashi Hikosaka , Soichi Oikawa
IPC分类号： G11B5/65
CPC分类号： G11B5/855 , G11B5/656 , G11B5/667 , G11B5/7325
摘要： A magnetic recording medium comprising: on a non-magnetic substrate, at least a soft magnetic undercoat film comprising a soft magnetic material; an orientation control film for controlling an orientation of a film directly above; a perpendicular magnetic film in which an axis of easy magnetization is oriented mainly perpendicularly with respect to the substrate; and a protection film, wherein the perpendicular magnetic film has a structure in which a large number of magnetic grains are separated by a grain boundary layer, and an average separating distance between the magnetic grains along a straight line which connects centers of gravity of mutually neighboring magnetic grains is 1 nm or greater.
摘要翻译：一种磁记录介质，包括：在非磁性基底上，至少包含软磁性材料的软磁性底涂层; 用于直接控制膜的取向的取向控制膜; 垂直磁性膜，其中容易磁化的轴主要相对于衬底垂直取向; 和保护膜，其中垂直磁性膜具有其中大量的磁性颗粒被晶界层分离的结构，以及沿着相互相邻的重心的直线的磁性颗粒之间的平均分离距离磁性粒子为1nm以上。

7. 发明授权

US07033684B2 Magnetic recording medium, method of manufacture thereof, and magnetic read/write apparatus 有权
标题翻译：磁记录介质，其制造方法和磁读/写装置
公开(公告)号：US07033684B2
公开(公告)日：2006-04-25
申请号：US10617868
申请日：2003-07-14
申请人： Kenji Shimizu , Akira Sakawaki , Hiroshi Sakai , Takashi Hikosaka , Soichi Oikawa
发明人： Kenji Shimizu , Akira Sakawaki , Hiroshi Sakai , Takashi Hikosaka , Soichi Oikawa
IPC分类号： G11B5/66 , G11B5/70
CPC分类号： G11B5/66
摘要： A magnetic recording medium comprising at least a soft magnetic layer, an orientation control film that controls the orientation of a film provided directly thereabove, an intermediate film, a perpendicular magnetic recording film of which the axis of easy magnetization is generally oriented perpendicular to a non-magnetic substrate, and a protective film, that are provided on said substrate, wherein the intermediate film has saturation magnetization Ms of at least 20 (emu/cc) and equal to or less than 200 (emu/cc), a method of manufacture thereof, and a magnetic read/write apparatus.
摘要翻译：至少包括软磁性层的磁记录介质，控制其上方直接设置的膜的取向的取向控制膜，中间膜，垂直磁记录膜，易磁化轴通常垂直于非磁性层磁性基板和保护膜，其中所述中间膜具有至少20（emu / cc）且等于或小于200（emu / cc）的饱和磁化强度Ms，制造方法和磁读/写装置。

8. 发明申请

US20070065955A1 Perpendicular magnetic recording medium, manufacturing method therefor, and magnetic read/write apparatus using the same 失效
标题翻译：垂直磁记录介质及其制造方法以及使用其的磁读/写装置
公开(公告)号：US20070065955A1
公开(公告)日：2007-03-22
申请号：US10574573
申请日：2004-10-05
申请人： Tomoyuki Maeda , Soichi Okawa , Takeshi Iwasaki , Futoshi Nakamura , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
发明人： Tomoyuki Maeda , Soichi Okawa , Takeshi Iwasaki , Futoshi Nakamura , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
IPC分类号： G11B5/82 , H01L21/00
CPC分类号： G11B5/65 , G11B5/656 , G11B5/7325
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％。

9. 发明申请

US20070042227A1 Perpendicular magnetic recording medium and magnetic recording/reproducing apparatus 有权
标题翻译：垂直磁记录介质和磁记录/再现装置
公开(公告)号：US20070042227A1
公开(公告)日：2007-02-22
申请号：US10572780
申请日：2004-09-22
申请人： Takeshi Iwasaki , Soichi Oikawa , Futoshi Nakamura , Tomoyuki Maeda , Hiroshi Sakai , Akira Sakawaki , Kenji Shimizu
发明人： Takeshi Iwasaki , Soichi Oikawa , Futoshi Nakamura , Tomoyuki Maeda , Hiroshi Sakai , Akira Sakawaki , Kenji Shimizu
IPC分类号： G11B5/66
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。

10. 发明授权

US07141315B2 Magnetic recording medium, method of manufacturing the same, and magnetic recording and reproduction apparatus 失效
标题翻译：磁记录媒体及其制造方法以及磁记录再生装置
公开(公告)号：US07141315B2
公开(公告)日：2006-11-28
申请号：US10630751
申请日：2003-07-31
申请人： Kenji Shimizu , Akira Sakawaki , Hiroshi Sakai , Takashi Hikosaka , Futoshi Nakamura
发明人： Kenji Shimizu , Akira Sakawaki , Hiroshi Sakai , Takashi Hikosaka , Futoshi Nakamura
IPC分类号： G11B5/66 , G11B5/70
CPC分类号： G11B5/667 , G11B5/7325
摘要： A magnetic recording medium includes a nonmagnetic substrate on which is provided at least a soft magnetic under-film, an orientation control film that controls an orientation of a film directly above, a perpendicular magnetic recording film having an axis of easy magnetization oriented to be mainly perpendicular to the substrate and a protective film, wherein the orientation control film is alloy containing at least Cr and C. The magnetic recording medium is manufactured by a method including carrying out, in order, at least a step of forming a soft magnetic under-film on a nonmagnetic substrate, a step of forming an orientation control film that controls an orientation of a film directly above, a step of forming a perpendicular magnetic recording film having an axis of easy magnetization oriented to be mainly perpendicular to the substrate, and a step of forming a protective film. A magnetic recording and reproduction apparatus includes the magnetic recording medium and a magnetic head that records and reproduces information on the magnetic recording medium, wherein the magnetic head is a magnetic monopole head.
摘要翻译：磁记录介质包括至少设置有软磁性底膜的非磁性基板，控制正上方的膜的取向的取向控制膜，具有容易磁化的轴的垂直磁记录膜主要取向为垂直于基板和保护膜，其中定向控制膜是至少含有Cr和C的合金。磁记录介质通过一种方法制造，该方法包括依次进行至少一个步骤，在非磁性基板上形成膜，形成直接控制膜的取向的取向控制膜的步骤，形成具有主要垂直于基板的易磁化轴取向的垂直磁记录膜的步骤，以及形成保护膜的步骤。磁记录和再现装置包括磁记录介质和在磁记录介质上记录和再现信息的磁头，其中磁头是磁单极头。

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