公开(公告)号：US20060210835A1

公开(公告)日：2006-09-21

申请号：US11084402

申请日：2005-03-18

申请人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Natacha Supper

发明人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Natacha Supper

IPC分类号： G11B5/66

CPC分类号： G11B5/656 ,  G11B5/66

摘要： The invention includes a disk drive with a magnetic recording disk with an upper and lower sublayer in at least one magnetic layer of a laminated magnetic layer structure that includes a spacer layer that substantially decouples the magnetic layers. The lower sublayer has a lower boron content than the upper sublayer and a preferred embodiment is CoPtCrBTa. The upper sublayer is deposited onto the lower sublayer and is preferably CoPtCrB with a higher boron content than the lower sublayer. The composition of the lower sublayer gives it a very low moment with low intrinsic coercivity which would not be useful as a recording layer on its own. The upper sublayer is a higher moment alloy with high intrinsic coercivity. An embodiment of the invention includes a laminated magnetic layer structure which is antiferromagnetically coupled to a lower ferromagnetic layer.

摘要翻译： 本发明包括具有磁记录盘的磁盘驱动器，该磁盘驱动器具有在层叠磁性层结构的至少一个磁性层中具有上和下子层的磁记录盘，该磁层包括使磁性层基本上分离的间隔层。 下层具有比上层更低的硼含量，优选实施方案是CoPtCrBTa。 上部子层沉积在下部子层上，优选的是具有比下部子层更高的硼含量的CoPtCrB。 下层的组成使得其具有低固有矫顽力的非常低的力矩，其本身不会用作记录层。 上层是具有高固有矫顽力的较高的力矩合金。 本发明的实施例包括层叠的磁性层结构，其被反铁磁耦合到下铁磁层。

公开(公告)号：US20060210834A1

公开(公告)日：2006-09-21

申请号：US11084401

申请日：2005-03-18

申请人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Natacha Supper

发明人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Natacha Supper

IPC分类号： G11B5/66

CPC分类号： G11B5/656 ,  G11B5/66

摘要： The invention uses an upper and lower sublayer in at least one magnetic layer of a laminated magnetic layer structure that includes a spacer layer that substantially decouples the magnetic layers in a magnetic recording medium. The lower sublayer has a lower boron content than the upper sublayer and a preferred embodiment is CoPtCrBTa. The upper sublayer is deposited onto the lower sublayer and is preferably CoPtCrB with a higher boron content than the lower sublayer. The composition of the lower sublayer gives it a very low moment with low intrinsic coercivity which would not be useful as a recording layer on its own. The upper sublayer is a higher moment alloy with high intrinsic coercivity. An embodiment of the invention includes a laminated magnetic layer structure which is antiferromagnetically coupled to a lower ferromagnetic layer.

摘要翻译： 本发明使用层叠磁性层结构的至少一个磁性层中的上部和下部子层，其包括使磁性记录介质中的磁性层基本上分离的间隔层。 下层具有比上层更低的硼含量，优选实施方案是CoPtCrBTa。 上部子层沉积在下部子层上，优选的是具有比下部子层更高的硼含量的CoPtCrB。 下层的组成使得其具有低固有矫顽力的非常低的力矩，其本身不会用作记录层。 上层是具有高固有矫顽力的较高的力矩合金。 本发明的实施例包括层叠的磁性层结构，其被反铁磁耦合到下铁磁层。

公开(公告)号：US20050190498A1

公开(公告)日：2005-09-01

申请号：US10788687

申请日：2004-02-26

申请人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Andreas Moser

发明人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Andreas Moser

IPC分类号： G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/738 ,  G11B5/82 ,  H01F10/16

CPC分类号： G11B5/66 ,  G11B5/656

摘要： A magnetic recording disk has an antiferromagnetically-coupled (AFC) structure that has three lower ferromagnetic layers (LL1, LL2, LL3) and an upper ferromagnetic layer (UL), all four ferromagnetic layers being antiferromagnetically-coupled together across corresponding antiferromagnetically-coupling layers. The UL has a magnetization-remanence-thickness product (Mrt) greater than the Mrt each of the three lower layers LL1, LL2, LL3, and greater than the sum of the Mrt values of LL1 and LL3. The middle lower layer LL2 has an Mrt less than the Mrt of each of the other lower layers LL1 and LL3, and as a result the composite Mrt of the AFC structure is less than the composite Mrt of a conventional AFC structure having only a single lower layer. The AFC structure achieves this composite Mrt reduction without increasing the Mrt of any of the three lower layers above the maximum Mrt of the single lower layer in the conventional AFC structure.

摘要翻译： 磁记录盘具有反铁磁耦合（AFC）结构，其具有三个低铁磁层（LL1，LL2，LL3）和上铁磁层（UL），所有四个铁磁层在相应的反铁磁耦合层上反铁磁耦合在一起 。 UL具有大于三个下层LL1，LL2，LL3中的每一个的Mrt的磁化剩磁厚度乘积（Mrt），并且大于LL1和LL3的Mrt值的和。 中下层LL2的Mrt小于其他下层LL1和LL3中的每一层的Mrt，结果，AFC结构的复合材料Mrt小于仅具有单一下层LL1和LL3的常规AFC结构的复合材料Mrt 层。 AFC结构在不增加传统AFC结构中单个下层的最大Mrt以上的三个下层中的任何一个的Mrt的情况下实现了该复合Mrt的还原。

公开(公告)号：US20060199042A1

公开(公告)日：2006-09-07

申请号：US11073890

申请日：2005-03-07

申请人： Eric Fullerton ,  David Margulies ,  Natacha Supper ,  Hoa Do

发明人： Eric Fullerton ,  David Margulies ,  Natacha Supper ,  Hoa Do

IPC分类号： G11B5/66 ,  C23C14/00

CPC分类号： G11B5/66 ,  G11B5/732 ,  G11B5/7325 ,  G11B5/851

摘要： A method and apparatus for improving the signal-to-noise ratio in a longitudinal recording media is disclosed. The apparatus includes a first recording layer of the longitudinal recording media residing at the top of a recording media structure. The first recording layer includes an upper sublayer comprised of a CoPtCrB-based alloy material. The first recording layer also includes a lower sublayer comprised of a CoPtCrB-based alloy material and a middle sublayer comprised of a CoCrB-alloy. The middle sublayer is coupled to the upper sublayer and to the lower sublayer and is substantially thinner than the upper sublayer and the lower sublayer.

公开(公告)号：US20060177704A1

公开(公告)日：2006-08-10

申请号：US11231516

申请日：2005-09-21

申请人： Andreas Berger ,  Eric Fullerton ,  Hoa Do ,  Natacha Supper

发明人： Andreas Berger ,  Eric Fullerton ,  Hoa Do ,  Natacha Supper

IPC分类号： G11B5/66

CPC分类号： G11B5/66 ,  G11B5/656

摘要： A recording medium providing improved writeability in perpendicular recording applications includes a magnetic recording layer having an axis of magnetic anisotropy substantially perpendicular to the surface thereof, an exchange-spring layer ferromagnetically exchange coupled to the magnetic recording layer and having a coercivity less than the magnetic recording layer coercivity, and a coupling layer between the magnetic recording layer and the exchange-spring layer. The coupling layer regulates the ferromagnetic exchange coupling between the magnetic recording layer and the exchange-spring layer.

摘要翻译： 在垂直记录应用中提供改善的写入能力的记录介质包括具有基本上垂直于其表面的磁各向异性轴的磁记录层，耦合到磁记录层并具有小于磁记录的矫顽磁力的磁性交换弹簧层 层矫顽力和磁记录层与交换弹簧层之间的耦合层。 耦合层调节磁记录层与交换弹簧层之间的铁磁交换耦合。

公开(公告)号：US20060177700A1

公开(公告)日：2006-08-10

申请号：US11051536

申请日：2005-02-04

申请人： Eric Fullerton ,  Hoa Do ,  David Margulies ,  Natacha Supper

发明人： Eric Fullerton ,  Hoa Do ,  David Margulies ,  Natacha Supper

IPC分类号： G11B5/66

CPC分类号： G11B5/66 ,  G11B5/656 ,  Y10T428/24975

摘要： A laminate structure is disclosed comprising multiple ferromagnetic layers achieving incoherent reversal while maintaining good SNR. A high magnetic moment density, low anisotropy field material may form a thin overlayer deposited over a high-anisotropy media layer. The media layer may have a lower magnetic moment density than the overlayer and have decoupled magnetic grains. A coupling layer may be interposed between the overlayer and the media layer to modulate the exchange there between, thereby reducing the pass-through of noise while still promoting incoherent reversal to achieve reduced write energy requirements.

摘要翻译： 公开了一种层叠结构，其包括多个铁磁层，同时保持良好的SNR，实现非相干反转。 高磁矩密度低的各向异性场材料可以形成沉积在高各向异性介质层上的薄覆盖层。 介质层可以具有比覆盖层更低的磁矩密度并且具有去耦的磁性颗粒。 耦合层可以插入在覆盖层和介质层之间以调制其间的交换，从而减少噪声的通过，同时仍然促进不相干的反转以实现降低的写入能量需求。

公开(公告)号：US06537638B2

公开(公告)日：2003-03-25

申请号：US09681056

申请日：2000-12-13

申请人： Hoa Do ,  Yoshihiro Ikeda ,  Yoshiaki Sonobe ,  Kentaro Takano

发明人： Hoa Do ,  Yoshihiro Ikeda ,  Yoshiaki Sonobe ,  Kentaro Takano

IPC分类号： G11B566

CPC分类号： G11B5/7325 ,  G11B5/65 ,  Y10S428/90

摘要： A perpendicular magnetic recording disk has an underlayer structure that causes the magnetic layer to have perpendicular magnetic anisotropy and high signal-to-noise ratio (SNR). The underlayer structure comprises a B2 type body-centered-cubic (BCC) material, such as the binary alloys NiAl, RuAl and RuTi, as an underlayer, and a Ti or TiCr alloy sublayer formed directly on the underlayer. The magnetic layer, such as a CoCrPt alloy, is deposited directly on the sublayer. The magnetic layer has perpendicular magnetic anisotropy due to the sublayer yet excellent SNR because of the smaller grain size of the sublayer material formed directly on the B2 type underlayer.

摘要翻译： 垂直磁记录盘具有底层结构，其使磁层具有垂直的磁各向异性和高的信噪比（SNR）。 底层结构包括B2型体心立方（BCC）材料，例如作为底层的二元合金NiAl，RuAl和RuTi，以及直接形成在底层上的Ti或TiCr合金子层。 磁性层，如CoCrPt合金，直接沉积在子层上。 由于子层材料直接在B2型底层上形成的较小的晶粒尺寸，所以磁层由于子层而具有良好的SNR，具有垂直的磁各向异性。

公开(公告)号：US20080096053A1

公开(公告)日：2008-04-24

申请号：US11584992

申请日：2006-10-23

申请人： Xiaoping Bian ,  Qing Dai ,  Hoa Do ,  Yoshihiro Ikeda ,  David Margulies ,  Mary Frances Minardi ,  Natacha Frederique Supper ,  Kentaro Takano ,  Min Xiao ,  Qi-Fan Xiao

发明人： Xiaoping Bian ,  Qing Dai ,  Hoa Do ,  Yoshihiro Ikeda ,  David Margulies ,  Mary Frances Minardi ,  Natacha Frederique Supper ,  Kentaro Takano ,  Min Xiao ,  Qi-Fan Xiao

IPC分类号： G11B5/66

CPC分类号： G11B5/667 ,  G11B5/65 ,  G11B5/66 ,  G11B5/7325

摘要： An improved structure for the construction of perpendicular recording media is disclosed. The structure includes a perpendicular recording layer with at least two oxide sublayers or a lower sublayer of a non-oxide. One structure includes an upper sublayer comprised of a Silicon-oxide, while a lower sublayer is comprised of a Tantalum-oxide. The structures provide for increased coercivity and corrosion resistance.

摘要翻译： 公开了用于构建垂直记录介质的改进的结构。 该结构包括具有至少两个氧化物层的垂直记录层或非氧化物的下层。 一个结构包括由氧化硅构成的上层，而下层由钽氧化物构成。 该结构提供增强的矫顽力和耐腐蚀性。

公开(公告)号：US20070212574A1

公开(公告)日：2007-09-13

申请号：US11372295

申请日：2006-03-09

申请人： Andreas Berger ,  Hoa Do ,  Eric Fullerton ,  Yoshihiro Ikeda ,  Byron Lengsfield ,  Natacha Supper

发明人： Andreas Berger ,  Hoa Do ,  Eric Fullerton ,  Yoshihiro Ikeda ,  Byron Lengsfield ,  Natacha Supper

IPC分类号： G11B5/66

CPC分类号： G11B5/66

摘要： A perpendicular magnetic recording medium has an “exchange-spring” type magnetic recording layer (RL) formed of two ferromagnetic layers with substantially similar anisotropy fields that are ferromagnetically exchange-coupled by a nonmagnetic or weakly ferromagnetic coupling layer. Because the write head produces a larger magnetic field and larger field gradient at the upper portion of the RL, while the field strength decreases further inside the RL, the upper ferromagnetic layer can have a high anisotropy field. The high field and field gradient near the top of the RL, where the upper ferromagnetic layer is located, reverses the magnetization of the upper ferromagnetic layer, which then assists in the magnetization reversal of the lower ferromagnetic layer. Because both ferromagnetic layers in this exchange-spring type RL have a high anisotropy field, the thermal stability of the medium is not compromised. The medium shows improved writability, i.e., a low switching field, as well as lower intrinsic media noise, over a medium with a conventional single-layer RL.

摘要翻译： 垂直磁记录介质具有由具有基本相似的各向异性场的两个铁磁层形成的“交换弹簧”型磁记录层（RL），其通过非磁性或弱铁磁耦合层进行铁磁交换耦合。 由于写头在RL的上部产生较大的磁场和较大的场梯度，而在RL内的场强进一步降低，所以上铁磁层可以具有高的各向异性场。 在RL的顶部附近的高场磁场梯度，其中上铁磁层位于其上，反转上铁磁层的磁化，其随后有助于下铁磁层的磁化反转。 由于这种交换弹簧型RL中的两个铁磁层具有高各向异性场，所以介质的热稳定性不受影响。 在具有常规单层RL的介质上，介质显示改进的可写性，即低切换场，以及较低的固有介质噪声。

公开(公告)号：US20070054153A1

公开(公告)日：2007-03-08

申请号：US11218702

申请日：2005-09-02

申请人： Qing Dai ,  Hoa Do ,  Min Xiao ,  Bing Yen

发明人： Qing Dai ,  Hoa Do ,  Min Xiao ,  Bing Yen

IPC分类号： G11B5/65

CPC分类号： G11B5/72 ,  G11B5/8408

摘要： A SiON overcoat for use on magnetic media for magnetic recording. The SiON overcoat is deposited by pulsed DC sputtering while applying a negative DC bias. The SiON overcoat is especially useful on perpendicular magnetic recording media because of its ability to deposit thinly and evenly on a rough, granular high coercivity recording media while maintaining excellent corrosion protection properties. A SiON overcoat can be applied less than 3 nm thick while still maintaining excellent mechanical and corrosion protection. The overcoat also has a very high density and water contact angle.

摘要翻译： 用于磁性介质磁记录的SiON外套。 通过脉冲DC溅射沉积SiON外涂层，同时施加负DC偏压。 SiON外涂层在垂直磁记录介质中特别有用，因为它能够在粗糙的颗粒状高矫顽力记录介质上薄薄均匀地沉积，同时保持优异的防腐蚀性能。 SiON外涂层可以施加小于3nm厚，同时仍然保持优异的机械和腐蚀保护。 外套也具有非常高的密度和水接触角。