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41. 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。

42. 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。

43. 发明授权

US07106539B2 Perpendicular magnetic recording apparatus 失效
标题翻译：垂直磁记录装置
公开(公告)号：US07106539B2
公开(公告)日：2006-09-12
申请号：US11168997
申请日：2005-06-29
申请人： Yuka Aoyagi , Tsutomu Tanaka , Kenji Shimizu , Akira Sakawaki
发明人： Yuka Aoyagi , Tsutomu Tanaka , Kenji Shimizu , Akira Sakawaki
IPC分类号： G11B15/18
CPC分类号： G11B5/667 , G11B5/1278 , G11B5/656 , G11B2005/0005
摘要： A perpendicular magnetic recording apparatus includes a perpendicular double-layered media having a substrate, a soft underlayer including a soft magnetic layer, an intermediate layer, and another soft magnetic layer in which the two soft magnetic layers are antiferromagnetically coupled with each other, and a perpendicular recording layer, and a magnetic head including a main pole, a return yoke, and an exciting coil. A relationship between an antiferromagnetic coupling force Hex_afc of the two soft magnetic layers included in the soft underlayer and a full width at half maximum MWW in a cross track direction when a low-frequency signal is recorded on the perpendicular recording layer by the magnetic head satisfies the following formula: Hex—afc>1.6*ln((0.23−MWW)2*100))+25.6.
摘要翻译：垂直磁记录装置包括具有基板的垂直双层介质，包括软磁层的软底层，中间层和其中两个软磁层彼此反铁磁耦合的另一软磁层，以及垂直记录层和包括主极，返回轭和励磁线圈的磁头。在低磁信号由磁头记录在垂直记录层上时，包含在软底层中的两个软磁性层的反铁磁耦合力Hex_afc与横向磁道方向上的半高宽MWW之间的关系满足以下公式：<？in-line-formula description =“In-line Formulas”end =“lead”？> Hex < - > / afc> 1.6 * ln（（0.23-MWW） * 100））+ 25.6。<？in-line-formula description =“In-line Formulas”end =“tail”？>

44. 发明授权

US06844046B2 Magnetic recording medium, production process thereof, magnetic recording and reproducing apparatus, and sputtering target 失效
标题翻译：磁记录介质，其制造方法，磁记录和重放装置以及溅射靶
公开(公告)号：US06844046B2
公开(公告)日：2005-01-18
申请号：US10405932
申请日：2003-04-03
申请人： Akira Sakawaki , Masato Kokubu , Ryuji Sakaguchi , Hiroshi Sakai
发明人： Akira Sakawaki , Masato Kokubu , Ryuji Sakaguchi , Hiroshi Sakai
IPC分类号： G11B5/84 , G11B5/851 , G11B5/738
CPC分类号： G11B5/8404 , G11B5/851 , Y10T428/12944 , Y10T428/24355 , Y10T428/265
摘要： An object of the present invention is to provide a process for easily producing a magnetic recording medium exhibiting excellent magnetic characteristics. In the present invention, an orientation-determining film is formed on a non-metallic substrate which has undergone texturing, the orientation-determining film is subjected to oxidation or nitridation, and a non-magnetic undercoat film and a magnetic film are formed on the film.
摘要翻译：本发明的目的是提供一种易于制造表现出优异的磁特性的磁记录介质的方法。在本发明中，在经过纹理化的非金属基材上形成取向决定膜，取向决定膜进行氧化或氮化，在该金属基材上形成非磁性底涂膜和磁性膜电影。

45. 发明授权

US07901803B2 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：US07901803B2
公开(公告)日：2011-03-08
申请号：US10574573
申请日：2004-10-05
申请人： Tomoyuki Maeda , Soichi Oikawa , Takeshi Iwasaki , Futoshi Nakamura , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
发明人： Tomoyuki Maeda , Soichi Oikawa , Takeshi Iwasaki , Futoshi Nakamura , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
IPC分类号： G11B5/66 , G11B5/738
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％。

46. 发明授权

US07867638B2 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：US07867638B2
公开(公告)日：2011-01-11
申请号：US12274879
申请日：2008-11-20
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 , G11B5/673 , C23C16/40
CPC分类号： G11B5/656 , G11B5/65 , G11B5/66
摘要： A magnetic-recording medium which is provided on a nonmagnetic substrate with at least an orientation-controlling layer for controlling the orientation of a layer formed directly thereon, a perpendicularly magnetic layer having an easily magnetizing axis oriented mainly perpendicularly relative to the nonmagnetic substrate, and a protective layer. The perpendicularly magnetic layer includes two or more magnetic layers, at least one of the magnetic layers is a layer having Co as a main component and containing Pt as well and containing an oxide, and at least another of the magnetic layers is a layer having Co as a main component and containing Cr as well and containing no oxide.
摘要翻译：一种磁记录介质，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的非磁性基板上，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，以及保护层。垂直磁性层包括两个或更多个磁性层，至少一个磁性层是具有Co作为主要成分并且还含有Pt并含有氧化物的层，并且至少另一个磁性层是具有Co 作为主要成分，并含有Cr，也不含氧化物。

47. 发明授权

US07601445B2 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：US07601445B2
公开(公告)日：2009-10-13
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： G11B5/65
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。

48. 发明授权

US07470474B2 Magnetic recording medium, production process thereof, and magnetic recording and reproducing apparatus including both oxide and non-oxide perpendicular magnetic layers 有权
标题翻译：磁记录介质及其制造方法以及包括氧化物和非氧化物垂直磁性层的磁记录和再现装置
公开(公告)号：US07470474B2
公开(公告)日：2008-12-30
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 , G11B5/673 , C23C16/40
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。

49. 发明授权

US07289298B2 Perpendicular magnetic recording medium, method for manufacturing the same, and magnetic recording/reproducing apparatus 失效
标题翻译：垂直磁记录介质，其制造方法和磁记录/再现装置
公开(公告)号：US07289298B2
公开(公告)日：2007-10-30
申请号：US10793950
申请日：2004-03-08
申请人： Tomoyuki Maeda , Takashi Hikosaka , Futoshi Nakamura , Takeshi Iwasaki , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
发明人： Tomoyuki Maeda , Takashi Hikosaka , Futoshi Nakamura , Takeshi Iwasaki , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
IPC分类号： G11B5/66
CPC分类号： G11B5/65 , G11B5/653 , G11B5/656
摘要： Disclosed is a magnetic recording medium which includes a substrate, an underlayer, and a perpendicular magnetic recording layer, and in which this perpendicular magnetic recording layer contains magnetic crystal grains and a matrix surrounding the magnetic crystal grains, and the matrix contains an element selected from Zn, Cd, Al, Ga, and In, and a component selected from P, As, Sb, S, Se, and Te.
摘要翻译：公开了一种磁记录介质，其包括基板，底层和垂直磁记录层，并且其中该垂直磁记录层包含磁性晶粒和围绕磁性晶粒的基体，并且该基体包含选自以下的元素： Zn，Cd，Al，Ga和In以及选自P，As，Sb，S，Se和Te的成分。

50. 发明授权

US07105239B2 Perpendicular magnetic recording medium and magnetic recording/reproducing apparatus using the same 失效
公开(公告)号：US07105239B2
公开(公告)日：2006-09-12
申请号：US10234856
申请日：2002-09-05
申请人： Soichi Oikawa , Takashi Hikosaka , Futoshi Nakamura , Takeshi Iwasaki , Hiroshi Sakai , Akira Sakawaki , Kenji Shimizu
发明人： Soichi Oikawa , Takashi Hikosaka , Futoshi Nakamura , Takeshi Iwasaki , Hiroshi Sakai , Akira Sakawaki , Kenji Shimizu
IPC分类号： G11B5/66 , G11B5/70
CPC分类号： G11B5/66
摘要： In a magnetic recording medium, a longitudinal hard magnetic layer, interlayer, longitudinal soft magnetic layer, and magnetic recording layer are multilayered on a substrate. The interlayer is one of a magnetic layer having saturation magnetization smaller than that of the longitudinal hard magnetic layer, a nonmagnetic layer mainly containing cobalt or ruthenium or having a thickness of 0.5 nm or less, and an oxide layer of the longitudinal hard magnetic layer.

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