公开(公告)号：US20100035085A1

公开(公告)日：2010-02-11

申请号：US12525539

申请日：2008-01-29

申请人： Hong-Sik Jung ,  Gerardo Bertero ,  Emur Velu ,  Michael Cheng-Chi Kuo ,  B. Ramamurthy Acharya ,  Sudhir Malhotra

发明人： Hong-Sik Jung ,  Gerardo Bertero ,  Emur Velu ,  Michael Cheng-Chi Kuo ,  B. Ramamurthy Acharya ,  Sudhir Malhotra

IPC分类号： G11B5/706 ,  B05D5/12

CPC分类号： G11B5/7325 ,  G11B5/7379

摘要： A perpendicular magnetic recording medium comprising a substrate, a soft underlayer, a seed layer, a non-magnetic FCC NiW alloy underlayer, a non-magnetic HCP underlayer, and a magnetic layer. We have discovered that the combination of a seed layer comprising Ta and a NiW alloy underlayer uniquely improves media recording performance and thermal stability by achieving excellent coercivity of the thin bottom magnetic recording layer and narrow C axis orientation distribution.

摘要翻译： 包括基底，软底层，种子层，非磁性FCC NiW合金底层，非磁性HCP底层和磁性层的垂直磁记录介质。 我们发现，通过实现薄底磁记录层的优良矫顽力和窄C轴取向分布，包含Ta和NiW合金底层的种子层的组合独特地改善介质记录性能和热稳定性。

公开(公告)号：US08488276B1

公开(公告)日：2013-07-16

申请号：US12242210

申请日：2008-09-30

申请人： Hong-Sik Jung ,  Donald Stafford ,  B. Ramamurthy Acharya ,  Sudhir S. Malhotra ,  Gerardo A. Bertero

发明人： Hong-Sik Jung ,  Donald Stafford ,  B. Ramamurthy Acharya ,  Sudhir S. Malhotra ,  Gerardo A. Bertero

IPC分类号： G11B5/82 ,  G11B5/66 ,  G11B5/851

CPC分类号： G11B5/7325 ,  G11B5/8404 ,  G11B5/851 ,  Y10T29/49043 ,  Y10T29/49044

摘要： A perpendicular magnetic recording (PMR) media including a non-magnetic or superparamagnetic grain isolation magnetic anisotropy layer (GIMAL) to provide a template for initially well-isolated small grain microstructure as well as improvement of Ku in core grains of a magnetic recording layer. The GIMAL composition may be adjusted to have lattice parameters similar to a bottom magnetic recording layer and to provide a buffer for reducing interface strains caused by lattice mismatch between the bottom magnetic recording layer and an underlying layer.

摘要翻译： 包括非磁性或超顺磁性晶粒分离磁各向异性层（GIMAL）的垂直磁记录（PMR）介质，以提供用于初始良好分离的小晶粒微结构的模板以及磁记录层的芯颗粒中的Ku的改进。 可以将GIMAL组合物调整为具有类似于底部磁记录层的晶格参数，并提供用于减少由底部磁记录层和下层之间的晶格失配引起的界面应变的缓冲器。

公开(公告)号：US08394243B1

公开(公告)日：2013-03-12

申请号：US12242410

申请日：2008-09-30

申请人： Hong-Sik Jung ,  Donald Stafford ,  B. Ramamurthy Acharya ,  Sudhir S. Malhotra ,  Gerardo A. Bertero

发明人： Hong-Sik Jung ,  Donald Stafford ,  B. Ramamurthy Acharya ,  Sudhir S. Malhotra ,  Gerardo A. Bertero

IPC分类号： C23C14/00 ,  G11B5/33

CPC分类号： G11B5/82 ,  C23C14/08 ,  C23C14/3414 ,  G11B5/656 ,  G11B5/851 ,  Y10T428/115

摘要： Method of incorporating atomic oxygen into a magnetic recording layer by sputtering a target containing an oxide of cobalt. The oxide of cobalt may be sputtered to provide a readily dissociable source of oxygen which may increase the concentration of free cobalt atoms (Co) in the magnetic recording layer and also increase oxide content in the magnetic recording layer.

摘要翻译： 通过溅射含有钴的氧化物的靶将原子氧结合到磁记录层中的方法。 可以溅射钴的氧化物以提供容易解离的氧源，这可以增加磁记录层中游离钴原子（Co）的浓度，并且还增加磁记录层中的氧化物含量。

公开(公告)号：US08597723B1

公开(公告)日：2013-12-03

申请号：US12987975

申请日：2011-01-10

申请人： Hong-Sik Jung ,  Emur M. Velu ,  Sudhir S. Malhotra ,  Jackie Tsoi Jung ,  Gerardo A. Bertero

发明人： Hong-Sik Jung ,  Emur M. Velu ,  Sudhir S. Malhotra ,  Jackie Tsoi Jung ,  Gerardo A. Bertero

IPC分类号： G11B5/64

CPC分类号： G11B5/852 ,  G11B5/667

摘要： A perpendicular magnetic recording disk having a single domain exchange-coupled laminated soft magnetic underlayer (SUL) is disclosed. The SUL is a combination synthetic anti-parallel coupled SUL structure, which has the product (Mst) of saturation magnetization and film thickness of the middle ferromagnetic layer less than the sum of the Mst of the bottom and top ferromagnetic layers. Subjected to a post radial field reset process, this SUL provides single domain state. Moreover, both robustness of stray fields and low permeability are obtained while keeping excellent corrosion resistance and cost effective manufacturability.

摘要翻译： 公开了具有单畴交换耦合层叠软磁性底层（SUL）的垂直磁记录盘。 SUL是合成反并联耦合SUL结构，其具有饱和磁化的产物（Mst）和中间铁磁层的膜厚小于底部和顶部铁磁层的Mst之和。 受到后径向场复位过程的影响，该SUL提供单域状态。 此外，在保持优异的耐腐蚀性和成本有效的可制造性的同时获得杂散场的鲁棒性和低渗透性。

公开(公告)号：US07910159B2

公开(公告)日：2011-03-22

申请号：US11145197

申请日：2005-06-03

申请人： Hong-Sik Jung

发明人： Hong-Sik Jung

IPC分类号： G11B5/64

CPC分类号： G11B5/8404

摘要： A radial magnetic field reset apparatus including a housing having a cavity with a soft magnet rod disposed at its center and a permanent magnet disposed around the cavity. The cavity and thickness of the soft magnet rod are sized to permit a cassette of disks to be inserted into the housing with the soft magnet rod disposed within the inner diameter holes of the disks contained in the cassette. The soft magnet rod at the center of the housing attracts the magnetic field generated by the permanent magnet, which results in a substantially uniform, radial magnetic field inside the housing.

摘要翻译： 一种径向磁场复位装置，包括具有设置在其中心的具有软磁棒的空腔的壳体和设置在腔体周围的永磁体。 软磁棒的空腔和厚度的尺寸设置成允许将磁盘盒插入壳体中，其中软磁棒设置在容纳在磁带盒中的磁盘的内径孔内。 壳体中心处的软磁棒吸引由永磁体产生的磁场，这导致壳体内的基本均匀的径向磁场。

公开(公告)号：US20060286412A1

公开(公告)日：2006-12-21

申请号：US11145197

申请日：2005-06-03

申请人： Hong-Sik Jung

发明人： Hong-Sik Jung

IPC分类号： G11B5/64

CPC分类号： G11B5/8404

摘要： A radial magnetic field reset apparatus including a housing having a cavity with a soft magnet rod disposed at its center and a permanent magnet disposed around the cavity. The cavity and thickness of the soft magnet rod are sized to permit a cassette of disks to be inserted into the housing with the soft magnet rod disposed within the inner diameter holes of the disks contained in the cassette. The soft magnet rod at the center of the housing attracts the magnetic field generated by the permanent magnet, which results in a substantially uniform, radial magnetic field inside the housing.

摘要翻译： 一种径向磁场复位装置，包括具有设置在其中心的具有软磁棒的空腔的壳体和设置在腔体周围的永磁体。 软磁棒的空腔和厚度的尺寸设置成允许将磁盘盒插入壳体中，其中软磁棒设置在容纳在磁带盒中的磁盘的内径孔内。 壳体中心处的软磁棒吸引由永磁体产生的磁场，这导致壳体内的基本均匀的径向磁场。

公开(公告)号：US20060147758A1

公开(公告)日：2006-07-06

申请号：US11031613

申请日：2005-01-06

申请人： Hong-Sik Jung ,  Michael Avenell

发明人： Hong-Sik Jung ,  Michael Avenell

IPC分类号： G11B5/66

CPC分类号： G11B5/667 ,  G11B5/66

摘要： A perpendicular magnetic recording disk with a magnetically resetable single domain soft magnetic underlayer. The perpendicular magnetic recording disk may include a hard magnetic pinning layer disposed above a substrate, a spacer layer disposed above the hard magnetic pinning layer, a soft ferromagnetic film disposed above the spacer layer, and a magnetic recording layer disposed above the soft ferromagnetic film.

摘要翻译： 具有磁性可复位单域软磁性底层的垂直磁记录盘。 垂直磁记录盘可以包括设置在基板上方的硬磁性钉扎层，设置在硬磁性钉扎层上方的间隔层，设置在间隔层上方的软铁磁膜和设置在软铁磁膜上方的磁记录层。