公开(公告)号：US06607842B2

公开(公告)日：2003-08-19

申请号：US09758379

申请日：2001-01-09

申请人： Xiaoping Bian ,  Mary Frances Doerner ,  Tim Minvielle ,  Mohammad Taghi Mirzamaani ,  Kai Tang

发明人： Xiaoping Bian ,  Mary Frances Doerner ,  Tim Minvielle ,  Mohammad Taghi Mirzamaani ,  Kai Tang

IPC分类号： G11B565

CPC分类号： G11B5/66 ,  Y10T428/12465 ,  Y10T428/12736 ,  Y10T428/12743 ,  Y10T428/12757 ,  Y10T428/12861 ,  Y10T428/12931 ,  Y10T428/24967 ,  Y10T428/265

摘要： The thin film disk includes a pre-seed layer of amorphous or nanocrystalline structure which may be AlTi or AlTa, and that is deposited upon a disk substrate. The pre-seed layer is followed by the RuAl seed layer, a Cr alloy underlayer, an onset layer composed essentially of CoCr and a magnetic layer. The onset layer has an optimal concentration of 28-33 at. % Cr and an optimal thickness of 0.5 to 2.5 nm and it increases coercivity and improves the Signal-to-Noise Ratio (SNR) of the disk. The magnetic layer is comprised of CoPtxCrBy, wherein x is the at. % concentration of Pt, y is the at. % concentration of boron, and x>4+y.

摘要翻译： 薄膜盘包括可以是AlTi或AlTa并且沉积在盘基底上的非晶或纳米晶体结构的种子前层。 预种子层之后是RuAl种子层，Cr合金底层，基本上由CoCr和磁性层组成的起始层。 起始层的最佳浓度为28-33。 ％Cr，最佳厚度为0.5〜2.5nm，提高了矫顽力，提高了磁盘的信噪比（SNR）。 磁性层由CoPtxCrBy组成，其中x是at。 Pt的浓度百分比，y为at。 ％的硼浓度，x> 4 + y。

公开(公告)号：US06716542B2

公开(公告)日：2004-04-06

申请号：US09789928

申请日：2001-02-22

申请人： Hiroyuki Uwazumi ,  Tadaaki Oikawa

发明人： Hiroyuki Uwazumi ,  Tadaaki Oikawa

IPC分类号： G11B565

CPC分类号： G11B5/851 ,  C22C5/04 ,  C23C14/0688 ,  C23C14/3414 ,  Y10T428/25 ,  Y10T428/252 ,  Y10T428/256 ,  Y10T428/259

摘要： The present invention provides a sputtering target for production of a magnetic recording medium including at least a nonmagnetic undercoat layer, a magnetic layer, and a protective layer laminated sequentially on a nonmagnetic substrate, the sputtering target being used for film formation of the magnetic layer, the sputtering target comprising a mixture of a metal and an oxide, and the particle diameter of the oxide in the sputtering target being 10 &mgr;m or less. The sputtering target suppresses abnormal discharge occurring during film formation of a granular magnetic layer of the magnetic recording medium, and suppresses occurrence of foreign objects on the magnetic recording medium.

摘要翻译： 本发明提供一种用于生产至少包括非磁性底涂层，磁性层和保护层的磁记录介质的溅射靶，其顺序地层合在非磁性基底上，溅射靶用于磁性层的成膜， 溅射靶包括金属和氧化物的混合物，溅射靶中的氧化物的粒径为10μm以下。 溅射靶抑制在磁记录介质的粒状磁性层的成膜期间发生的异常放电，并且抑制在磁记录介质上产生异物。

公开(公告)号：US06803117B2

公开(公告)日：2004-10-12

申请号：US10166880

申请日：2002-06-11

申请人： Hideyuki Akimoto ,  Kenji Sato ,  Yuki Yoshida ,  Masaya Suzuki ,  Akira Kikuchi ,  Tohru Horie ,  Naoya Saito ,  Akiko Honda

发明人： Hideyuki Akimoto ,  Kenji Sato ,  Yuki Yoshida ,  Masaya Suzuki ,  Akira Kikuchi ,  Tohru Horie ,  Naoya Saito ,  Akiko Honda

IPC分类号： G11B565

CPC分类号： G11B5/7315 ,  G11B5/66 ,  G11B5/7325 ,  G11B5/84 ,  Y10T428/12646 ,  Y10T428/12833 ,  Y10T428/1284 ,  Y10T428/12854 ,  Y10T428/12931 ,  Y10T428/24355 ,  Y10T428/24537 ,  Y10T428/24975 ,  Y10T428/265 ,  Y10T428/31

摘要： A magnetic recording medium for high areal recording density that has excellent thermal fluctuation resistance and recording/reproduction characteristics, and a method of producing the same. The magnetic recording medium includes a glass substrate, an NiP layer having an oxide film on its surface provided on the glass substrate, a ground layer provided on the NiP layer, and a nonmagnetic intermediate layer provided on the ground layer. The magnetic recording medium further includes an exchange layer structure composed of a ferromagnetic layer and a nonmagnetic coupling layer provided on the nonmagnetic intermediate layer, and a magnetic recording layer provided on the exchange layer structure. The oxide film on the NiP layer is formed by introducing a small quantity of oxygen into a vacuum chamber of a sputter device. The formation and oxidation of the NiP layer are conducted at a temperature of not less than 140° C.

摘要翻译： 一种具有优异的耐热波动性和记录/再现特性的高面积记录密度的磁记录介质及其制造方法。 磁记录介质包括玻璃基板，在玻璃基板上的表面上具有氧化膜的NiP层，设置在NiP层上的接地层和设置在接地层上的非磁性中间层。 磁记录介质还包括由铁磁层和设置在非磁性中间层上的非磁性耦合层构成的交换层结构，以及设置在交换层结构上的磁记录层。 通过将少量氧气引入溅射装置的真空室中，形成NiP层上的氧化物膜。 NiP层的形成和氧化在不低于140℃的温度下进行。

公开(公告)号：US06544667B1

公开(公告)日：2003-04-08

申请号：US09523381

申请日：2000-03-10

申请人： Yuzuru Hosoe ,  Yoshibumi Matsuda ,  Yotsuo Yahisa ,  Kiwamu Tanahashi ,  Hiroyuki Suzuki ,  Koji Sakamoto ,  Akira Kato

发明人： Yuzuru Hosoe ,  Yoshibumi Matsuda ,  Yotsuo Yahisa ,  Kiwamu Tanahashi ,  Hiroyuki Suzuki ,  Koji Sakamoto ,  Akira Kato

IPC分类号： G11B565

CPC分类号： G11B5/7325 ,  G11B5/656 ,  G11B5/732 ,  G11B5/851 ,  Y10T428/12465 ,  Y10T428/12833 ,  Y10T428/1284 ,  Y10T428/12854 ,  Y10T428/12875 ,  Y10T428/26 ,  Y10T428/265

摘要： In a magnetic recording medium having Co-based alloy magnetic layer containing Pt formed on a substrate through an underlayer, by forming said underlayer with plural underlayers including double layer structure which is formed by piling up 1st underlayer of Cr-based alloy containing Ti and 2nd underlayer of Cr-based alloy containing at least one element selected from a group comprising Mo and W in this sequence, crystal grain diameter is decreased and then medium noise can be decreased, and c axis is oriented to in-plane direction and then high coercivity can be obtained, consequently the magnetic recording medium having high signal to noise ratio at high recording density region is obtained. Further a small size large capacity magnetic recording system can be provided by combination of said magnetic recording media with a MR (magnetoresistive) head.

摘要翻译： 在具有通过底层形成在基板上的具有Co的Co基合金磁性层的磁记录介质中，通过将包含双层结构的多个底层形成所述底层，所述双层结构通过堆叠含有Ti和第二层的Cr基合金的第一底层而形成 在该顺序中含有选自Mo和W的至少一种元素的Cr基合金的下层，晶粒直径减小，然后可以降低中等噪声，并且c轴取向于面内方向，然后取向于高矫顽力 可以得到在高记录密度区域具有高信噪比的磁记录介质。 此外，可以通过所述磁记录介质与MR（磁阻）磁头的组合来提供小尺寸的大容量磁记录系统。

公开(公告)号：US06740398B2

公开(公告)日：2004-05-25

申请号：US10008646

申请日：2001-11-09

申请人： Christopher Loren Platt

发明人： Christopher Loren Platt

IPC分类号： G11B565

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  C23C14/165 ,  G01R33/093 ,  G11B5/3932 ,  G11B5/732 ,  G11B5/7325 ,  G11B2005/001 ,  G11B2005/0029 ,  G11B2005/3996 ,  H01F10/08 ,  H01F10/10 ,  H01F10/3218 ,  Y02T50/67 ,  Y10T428/115

摘要： Magnetic films comprising iridium, manganese and nitrogen (IrMnN) are disclosed. Multi-layer structures including ferromagnetic layers deposited on the IrMnN films are also disclosed. The IrMnN films have a (200) texture and may act as seed layers and/or exchange biasing layers for the ferromagnetic layers deposited thereon. The multi-layer structures are useful in applications such as read sensors for magnetic recording heads and soft magnetic underlayers for perpendicular magnetic recording media.

摘要翻译： 公开了包含铱，锰和氮（IrMnN）的磁性膜。 还公开了包括沉积在IrMnN膜上的铁磁层的多层结构。 IrMnN膜具有（200）结构，并且可以作为沉积在其上的铁磁层的种子层和/或交换偏置层。 多层结构在诸如用于磁记录头的读取传感器和用于垂直磁记录介质的软磁性底层的应用中是有用的。

公开(公告)号：US06699588B2

公开(公告)日：2004-03-02

申请号：US09559347

申请日：2000-04-27

申请人： Qixu (David) Chen ,  Liji Huang ,  Charles Leu ,  Rajiv Yadav Ranjan

发明人： Qixu (David) Chen ,  Liji Huang ,  Charles Leu ,  Rajiv Yadav Ranjan

IPC分类号： G11B565

CPC分类号： G11B5/7325 ,  G11B5/8404 ,  Y10T428/12826 ,  Y10T428/12861 ,  Y10T428/261

摘要： Sputter-deposited amorphous NiNb films on glass or glass-ceramic substrates have good adhesion with the substrates, and reduce lithium migration significantly. Longitudinal magnetic recording media deposited on oxidized NiNb sealing layers have very good magnetic recording performances and are suitable for high density recording application.

摘要翻译： 在玻璃或玻璃陶瓷衬底上的溅射沉积的非晶NiNb膜与衬底具有良好的粘附性，并显着降低锂迁移。 沉积在氧化NiNb密封层上的纵向磁记录介质具有非常好的磁记录性能，适用于高密度记录应用。

公开(公告)号：US06383597B1

公开(公告)日：2002-05-07

申请号：US09602581

申请日：2000-06-21

申请人： Eric Edward Fullerton ,  Dieter Klaus Weller

发明人： Eric Edward Fullerton ,  Dieter Klaus Weller

IPC分类号： G11B565

CPC分类号： B82Y10/00 ,  G11B5/653 ,  G11B5/656 ,  G11B5/74 ,  G11B5/743 ,  G11B5/82 ,  G11B5/855 ,  G11B2005/0029 ,  Y10T428/12875 ,  Y10T428/24479 ,  Y10T428/31

摘要： A patterned magnetic recording disk has a magnetic recording layer patterned into discrete magnetic and nonmagnetic regions having substantially the same chemical composition. The nonmagnetic regions have a chemically-ordered L12 crystalline structure and the magnetic regions have a chemically-disordered crystalline structure. The chemically-ordered intermetallic compound FePt3, which is nonferromagnetic, is rendered ferromagnetic by ion irradiation. This FePt3 material can be patterned by irradiating local regions through a mask to create magnetic regions that serve as the magnetic bits. The ions pass through the openings in the mask and impact the chemically-ordered FePt3 in selected regions corresponding to the pattern of holes in the mask. The ions disrupt the ordering of the Fe and Pt atoms in the unit cell and transform the FePt3 into magnetic regions corresponding to the mask pattern, with the regions of the film not impacted by the ions retaining their chemically-ordered structure.

摘要翻译： 图案化磁记录盘具有图案化成具有基本上相同化学成分的离散磁性和非磁性区域的磁记录层。 非磁性区域具有化学有序的L12晶体结构，并且磁性区域具有化学无序的结晶结构。 化学有序的金属间化合物FePt3是非铁磁性的，通过离子辐照形成铁磁性。 该FePt3材料可以通过用掩模照射局部区域来形成，以产生用作磁性位的磁性区域。 离子通过掩模中的开口，并在对应于掩模中的孔图案的选定区域内冲击化学有序的FePt3。 离子破坏单位晶胞中Fe和Pt原子的排序，并将FePt3转变成对应于掩模图案的磁性区域，膜的区域不受保留其化学有序结构的离子的影响。

公开(公告)号：US06777078B2

公开(公告)日：2004-08-17

申请号：US10050118

申请日：2002-01-18

申请人： Tomoyuki Maeda ,  Akira Kikitsu ,  Toshihiko Nagase ,  Junichi Akiyama

发明人： Tomoyuki Maeda ,  Akira Kikitsu ,  Toshihiko Nagase ,  Junichi Akiyama

IPC分类号： G11B565

CPC分类号： G11B5/653 ,  G11B5/656

摘要： A magnetic recording medium has a substrate, an underlayer formed on the substrate, a magnetic layer formed on the underlayer and including crystal grains having an L10 structure mainly including Fe and Pt, mainly including Fe and Pd, or mainly including Co and Pt, and the crystal grains further including 0.1 to 50 atomic percent of at least one additive element dissolved therein.

摘要翻译： 磁记录介质具有衬底，在衬底上形成的底层，形成在底层上的磁性层，并且包括主要包含Fe和Pt或主要包括Co和Pt的具有主要包括Fe和Pt的L10结构的晶粒，以及 晶粒还包含溶解在其中的至少一种添加元素的0.1至50原子％。

公开(公告)号：US06720075B2

公开(公告)日：2004-04-13

申请号：US10097511

申请日：2002-03-13

申请人： Ikuya Tagawa ,  Koji Matsumoto

发明人： Ikuya Tagawa ,  Koji Matsumoto

IPC分类号： G11B565

CPC分类号： G11B5/00 ,  G11B5/02 ,  G11B5/64 ,  G11B2005/0002 ,  G11B2005/0029

摘要： A magnetic recording medium stable against heat of which high density recording can be attained is provided by employing a magnetic material such that coercive magnetic force in a recording magnetic layer increases with temperature rise. The magnetic recording medium is one in which the recording magnetic layer in which magnetic recording is carried out comprises an N-type Ferrimagnetic material, and compensation temperature of this N-type Ferrimagnetic material is made to be higher than an operating temperature range in which the magnetic recording medium is used.

摘要翻译： 通过采用使记录磁性层中的矫顽磁力随着温度升高而增加的磁性材料来提供可以获得高密度记录的耐热稳定性的磁记录介质。 磁记录介质是其中执行磁记录的记录磁性层包括N型铁磁性材料，并且使N型铁磁材料的补偿温度高于其中的N型铁磁性材料的工作温度范围 使用磁记录介质。

公开(公告)号：US06599642B2

公开(公告)日：2003-07-29

申请号：US09758396

申请日：2001-01-09

申请人： Xiaoping Bian ,  Mary Frances Doerner ,  Tim Minvielle ,  Mohammad Taghi Mirzamaani ,  Kai Tang

发明人： Xiaoping Bian ,  Mary Frances Doerner ,  Tim Minvielle ,  Mohammad Taghi Mirzamaani ,  Kai Tang

IPC分类号： G11B565

CPC分类号： G11B5/66 ,  Y10T428/12465 ,  Y10T428/12736 ,  Y10T428/12743 ,  Y10T428/12757 ,  Y10T428/12861 ,  Y10T428/12931 ,  Y10T428/24967 ,  Y10T428/265

摘要： The thin film disk includes a pre-seed layer of amorphous or nanocrystalline structure which may be AlTi or Alta, and that is deposited upon a disk substrate. The pre-seed layer is followed by the RuAl seed layer, a Cr alloy underlayer, an onset layer composed essentially of CoCr and a magnetic layer. The magnetic layer is comprised of CoPtxCrBy, wherein x is the at. % concentration of Pt, y is the at. % concentration of boron, and x>4+y.

摘要翻译： 薄膜盘包括可以是AlTi或Alta的非晶或纳米晶体结构的种子前层，并且沉积在盘基片上。 预种子层之后是RuAl种子层，Cr合金底层，基本上由CoCr和磁性层组成的起始层。 磁性层由CoPtxCrBy组成，其中x是at。 Pt的浓度百分比，y为at。 ％的硼浓度，x> 4 + y。