公开(公告)号：US20130334631A1

公开(公告)日：2013-12-19

申请号：US13527262

申请日：2012-06-19

Applicant: Wayne I. Kinney ,  Witold Kula ,  Stephen J. Kramer

Inventor： Wayne I. Kinney ,  Witold Kula ,  Stephen J. Kramer

IPC: H01L29/82 ,  G11B5/673 ,  G11B5/65 ,  H01L21/34 ,  G11B5/66

CPC classification number: H01L27/222 ,  G11C11/161 ,  G11C11/1673 ,  G11C11/1675 ,  H01F10/3218 ,  H01F10/329 ,  H01L27/228 ,  H01L43/02 ,  H01L43/08 ,  H01L43/10

Abstract: Memory cells are disclosed. Magnetic regions within the memory cells include an alternating structure of magnetic sub-regions and coupler sub-regions. The coupler material of the coupler sub-regions antiferromagnetically couples neighboring magnetic sub-regions and effects or encourages a vertical magnetic orientation exhibited by the neighboring magnetic sub-regions. Neighboring magnetic sub-regions, spaced from one another by a coupler sub-region, exhibit oppositely-directed magnetic orientations. The magnetic and coupler sub-regions may each be of a thickness tailored to form the magnetic region in a compact structure. Interference between magnetic dipole fields emitted from the magnetic region on switching of a free region in the memory cell may be reduced or eliminated. Also disclosed are semiconductor device structures, spin torque transfer magnetic random access memory (STT-MRAM) systems, and methods of fabrication.

Abstract translation: 公开了存储单元。 存储单元内的磁性区域包括磁性子区域和耦合器子区域的交替结构。 耦合器子区域的耦合器材料反铁磁耦合相邻磁性子区域并且影响或促进相邻磁性子区域呈现的垂直磁性取向。 通过耦合器子区彼此间隔开的相邻的磁子区域表现出相反方向的磁取向。 磁性和耦合器子区域可以各自具有被调整以在紧凑结构中形成磁性区域的厚度。 可以减少或消除在切换存储单元中的自由区域时从磁性区域发射的磁偶极子场之间的干扰。 还公开了半导体器件结构，自旋扭矩传递磁随机存取存储器（STT-MRAM）系统和制造方法。

公开(公告)号：US20130017413A1

公开(公告)日：2013-01-17

申请号：US13620499

申请日：2012-09-14

Applicant: Nurul Amin ,  Sining Mao

Inventor： Nurul Amin ,  Sining Mao

IPC: G11B5/673

CPC classification number: G11B5/84 ,  B26D3/16 ,  B82Y10/00 ,  G11B5/64 ,  G11B5/66 ,  G11B5/743 ,  G11B5/82 ,  G11B5/851 ,  G11B5/865 ,  Y10T83/04

Abstract: A method of fabricating a discrete track magnetic recording media. A base layer is provided onto which repeating and alternating magnetic layer and non-magnetic layers are deposited. The thickness of the magnetic layer corresponds to the width of the track of the recording media. A cylindrical rod can be used as the base layer, such that the alternating magnetic and non-magnetic layers spiraling or concentric layers around the rod. The resulting media layer can be cut or sliced into individual magnetic media or used to imprint other media discs with the discrete pattern of the media layer.

Abstract translation: 一种制造离散轨道磁记录介质的方法。 提供基层，沉积重复和交替的磁性层和非磁性层。 磁性层的厚度对应于记录介质的轨道的宽度。 可以使用圆柱形棒作为基层，使得交替的磁性和非磁性层围绕杆螺旋或同心层。 所得到的介质层可以被切割或切成单独的磁性介质，或用于用介质层的离散图案印刷其它介质盘。

公开(公告)号：US20120250178A1

公开(公告)日：2012-10-04

申请号：US13077797

申请日：2011-03-31

Applicant: Toshiki Hirano ,  Fu-Ying Huang ,  Jia-Yang Juang ,  Hal J. Rosen ,  Barry C. Stipe

Inventor： Toshiki Hirano ,  Fu-Ying Huang ,  Jia-Yang Juang ,  Hal J. Rosen ,  Barry C. Stipe

IPC: G11B5/02 ,  G11B5/673 ,  G11B5/66

CPC classification number: G11B5/66 ,  G11B5/7325 ,  G11B5/82

Abstract: A magnetic media for heat assisted magnetic data recording. The magnetic media includes a thermal insulation layer structure formed near the substrate of the media provide more efficient heating of the write layer by allowing less heat dissipation to the substrate. The thermal insulation layer structure can be one or more layers of an oxide such as SiO2 and one or more layers of a material such as NiTa. Increasing the number of oxide layers and NiTa layers increases the thermal insulation of the thermal insulation layer structure thereby further increasing the efficiency of the heat assisted writing.

Abstract translation: 用于热辅助磁数据记录的磁介质。 磁介质包括在介质的衬底附近形成的绝热层结构，通过允许对衬底的较少散热来提供写入层的更有效的加热。 绝热层结构可以是一层或多层氧化物如SiO 2和一层或多层诸如NiTa的材料。 增加氧化物层和NiTa层的数量增加了绝热层结构的热绝缘性，从而进一步提高了热辅助写入的效率。

公开(公告)号：US07514162B2

公开(公告)日：2009-04-07

申请号：US11185659

申请日：2005-07-19

Applicant: Andreas Klaus Berger ,  Eric E. Fullerton ,  Olav Hellwig

Inventor： Andreas Klaus Berger ,  Eric E. Fullerton ,  Olav Hellwig

IPC: G11B5/66 ,  G11B5/673

CPC classification number: G11B5/66 ,  G11B5/656 ,  G11B5/667 ,  G11B5/732 ,  G11B5/7325

Abstract: A perpendicular magnetic recording medium includes a metamagnetic antiferromagnetically-coupled (AFC) layer between the recording layer (RL) and the soft magnetically permeable underlayer (SUL). The metamagnetic AFC layer has essentially no net magnetic moment in the absence of a magnetic field, but is highly ferromagnetic in the presence of a magnetic field above a threshold field. Thus the metamagnetic AFC layer does not contribute to the readback signal during reading, but channels the write field to the SUL during writing because the threshold field is selected to be below the write field. An exchange-break layer EBL is located between the metamagnetic AFC layer and the RL. The metamagnetic AFC layer contains films with a crystalline structure suitable as a growth template for the EBL and RL, so the metamagnetic AFC layer also functions as part of an “effective EBL”, thereby allowing the actual EBL to be made as thin as possible.

Abstract translation: 垂直磁记录介质包括在记录层（RL）和软磁性可渗透底层（SUL）之间的超磁性反铁磁耦合（AFC）层。 在没有磁场的情况下，超磁性AFC层基本上没有净磁矩，但是在存在超过阈值场的磁场的情况下是高铁磁性的。 因此，偏磁AFC层在读取期间不对回读信号有贡献，而是在写入期间将写入场指向SUL，因为阈值域被选择为低于写入场。 交换断层EBL位于超磁性AFC层和RL之间。 超磁性AFC层含有具有适合于EBL和RL的生​​长模板的晶体结构的膜，因此，反磁性AFC层也起到“有效EBL”的一部分的作用，从而使实际的EBL尽可能薄。

公开(公告)号：US07033685B2

公开(公告)日：2006-04-25

申请号：US10679419

申请日：2003-10-07

Applicant: Jean L. Lee ,  Thomas P. Nolan ,  Hong Ying Wang ,  Gary C. Rauch

Inventor： Jean L. Lee ,  Thomas P. Nolan ,  Hong Ying Wang ,  Gary C. Rauch

IPC: G11B5/667 ,  G11B5/673

CPC classification number: G11B5/667 ,  G11B5/656 ,  G11B5/8404 ,  Y10T428/24248

Abstract: A method of manufacturing a perpendicular magnetic recording medium, comprises steps of: (a) providing a substrate of an amorphous thermoplastic polymer material having softening and glass transition temperatures as low as about 95° C.; and (b) forming at least one stack of thin film layers atop at least one surface of the substrate, the at least one layer stack including at least one granular magnetic recording layer of perpendicular type, wherein oxides and/or nitrides provide physical de-coupling of adjacent magnetic grains; and wherein each of the thin film layers is formed by depositing at a substrate temperature not greater than about 70° C., and the coercivity (Hc) of the resultant perpendicular magnetic recording medium is at least about 4,000 Oe.

Abstract translation: 制造垂直磁记录介质的方法包括以下步骤：（a）提供具有低至约95℃的软化和玻璃化转变温度的无定型热塑性聚合物材料的基底; 和（b）在所述衬底的至少一个表面上方形成至少一层薄膜层，所述至少一层堆叠包括至少一个垂直型粒状磁记录层，其中氧化物和/或氮化物提供物理去除层， 相邻磁性颗粒的耦合; 并且其中每个薄膜层通过在不大于约70℃的衬底温度下沉积而形成，并且所得到的垂直磁记录介质的矫顽力（H C）至少约为 4000盎司

公开(公告)号：US06986954B2

公开(公告)日：2006-01-17

申请号：US10123957

申请日：2002-04-17

Applicant: Joseph H. Sexton

Inventor： Joseph H. Sexton

IPC: G11B5/673

CPC classification number: G11B5/732 ,  G11B5/66

Abstract: Perpendicular magnetic media are described for use in magnetic recording and data storage. For example, a magnetic medium may include a substrate, a layer of titanium formed over the substrate, a layer of platinum formed over the layer of titanium, and a multi-layered magnetic stack formed over the layer of platinum. The layer of titanium provides a seed layer to improve the crystal texture of the layer of platinum. The layer of platinum, in turn, provides a seed layer to improve the crystal texture of the multi-layered magnetic stack. In this manner, high perpendicular magnetic anisotropy can be achieved and storage densities can be increased.

公开(公告)号：US20050227122A1

公开(公告)日：2005-10-13

申请号：US10511584

申请日：2003-03-20

Applicant: Migaku Takahashi ,  David Djayaprawira ,  Hirold Domon

Inventor： Migaku Takahashi ,  David Djayaprawira ,  Hirold Domon

IPC: C23C14/14 ,  G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/673 ,  G11B5/73 ,  G11B5/738 ,  G11B5/84 ,  H01F10/16

CPC classification number: G11B5/7325 ,  G11B5/66 ,  G11B5/7379

Abstract: A vertical magnetic recording medium exhibiting excellent noise characteristics in which magnetic interaction is reduced in a magnetic layer. The vertical magnetic recording medium (10) includes a nonmagnetic substrate (1), an underlying layer (2) formed directly or indirectly on the nonmagnetic substrate (1), and a magnetic layer (4) for recording magnetic information formed on the underlying layer (2), characterized in that the underlying layer (2) is composed of an alloy principally including two kinds of element, difference of standard free energy ΔG° for producing an oxide or a nitride of the both elements at room temperature is set not lower than 70 kJ/mol[O2 or N2], and crystal grains constituting the underlying layer (2) principally includes one of two elements having a higher ΔG°, and the grain boundary of the underlying layer (2) principally includes an oxide or a nitride of an element having a lower ΔG°.

Abstract translation: 具有优异的噪声特性的垂直磁记录介质，其磁性层中的磁相互作用减小。 垂直磁记录介质（10）包括非磁性衬底（1），直接或间接形成在非磁性衬底（1）上的下层（2）和用于记录形成在下层上的磁信息的磁性层（4） （2），其特征在于，下层（2）由主要包含两种元素的合金构成，室温下用于制造两种元素的氧化物或氮化物的标准自由能差ΔG°的差设定为不低 构成下层（2）的晶粒主要包括具有较高ΔG°的两个元素中的一个，并且下层（2）的晶界主要包括氧化物或 具有较低DeltaG°的元素的氮化物。

公开(公告)号：US20050202285A1

公开(公告)日：2005-09-15

申请号：US11069920

申请日：2005-03-01

Applicant: Yasuyuki Kawada

Inventor： Yasuyuki Kawada

IPC: G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/667 ,  G11B5/673 ,  G11B5/73 ,  G11B5/738 ,  G11B5/851

CPC classification number: G11B5/66 ,  G11B5/65 ,  G11B5/7325

Abstract: A perpendicular magnetic recording medium is disclosed that exhibits reduced media noise and enhanced thermal stability of recorded magnetization, and thus provides a medium of high recording density and excellent read-write performance. The perpendicular magnetic recording medium comprises a magnetic film on a nonmagnetic substrate. The magnetic film is a multilayered lamination film composed of alternately laminated first magnetic layers of cobalt and second magnetic layers of palladium, the second magnetic layers containing SiO2. By setting a ratio of Ku2 to Ku to a value not smaller than a specified value, the compatibility between the ease of writing-in to the perpendicular magnetic recording medium by a head and the thermal stability of recorded magnetization is more improved.

Abstract translation: 公开了一种垂直磁记录介质，其表现出降低的介质噪声和增强的记录磁化的热稳定性，从而提供高记录密度和优异的读写性能的介质。 垂直磁记录介质包括在非磁性基底上的磁性膜。 磁性膜是由钴和第二磁性层的交替层叠的第一磁性层构成的多层叠层膜，第二磁性层含有SiO 2。 通过将Ku＆gt; 2＆gt;与Ku的比率设定为不小于规定值的值，由头部写入垂直磁记录介质的容易性和记录的热稳定性之间的兼容性 磁化强度进一步提高。

公开(公告)号：US20050196641A1

公开(公告)日：2005-09-08

申请号：US11063232

申请日：2005-02-22

Applicant: Kazuyoshi Shibata

Inventor： Kazuyoshi Shibata

IPC: G11B5/738 ,  G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/667 ,  G11B5/673 ,  G11B5/73 ,  G11B5/851

CPC classification number: G11B5/667 ,  G11B5/66 ,  G11B5/7325

Abstract: There is provided a perpendicular magnetic recording medium which causes low media noise and achieves preferable read/write performance. A perpendicular magnetic layer is constructed such that first magnetic layers formed of Co or Co containing an oxide and second magnetic layers formed of Pt or Pd containing an oxide are layered. The perpendicular magnetic layer is provided on a non-magnetic substrate via a Ru underlayer containing oxygen. An alignment control layer formed of a Ni—Fe alloy is provided between the non-magnetic substrate and the underlayer to control the crystal alignment of the underlayer. A soft magnetic backing layer is provided between the substrate and the alignment control layer.

Abstract translation: 提供了一种引起低介质噪声并实现优选的读/写性能的垂直磁记录介质。 垂直磁性层被构造成使得由包含氧化物的Co或Co形成的第一磁性层和由含有氧化物的Pt或Pd形成的第二磁性层被层叠。 垂直磁性层通过含有氧的Ru底层设置在非磁性基板上。 在非磁性基板和底层之间设置由Ni-Fe合金形成的取向控制层，以控制底层的晶体取向。 在基板和对准控制层之间设置软磁背衬层。

公开(公告)号：US20050142378A1

公开(公告)日：2005-06-30

申请号：US11012835

申请日：2004-12-14

Applicant: Hiroaki Nemoto ,  Yuzuru Hosoe ,  Yoshiyuki Hirayama ,  Mineaki Kodama

Inventor： Hiroaki Nemoto ,  Yuzuru Hosoe ,  Yoshiyuki Hirayama ,  Mineaki Kodama

IPC: G11B5/673 ,  G11B5/64 ,  G11B5/65 ,  G11B5/851 ,  B05D5/12

CPC classification number: G11B5/65 ,  G11B5/851 ,  Y10T428/12875

Abstract: Embodiments of the invention provide a granular medium structure and a significant increase of the Ku value of a magnetic material at the same time using a non-metal material, thereby obtaining a magnetic recording medium capable of high density recording. In one embodiment, a magnetic metal grain in a granular magnetic film made of magnetic metal grains and a non-magnetic material is obtained by laminating a ferromagnetic exchange metallic element that contains mainly Co or Fe and a Pt element alternately and the lamination period is set between about 0.35 nm and 0.9 nm, preferably between about 0.4 nm and 0.55 nm.

Abstract translation: 本发明的实施例使用非金属材料同时提供磁性材料的粒状介质结构和显着提高磁性材料的K值，由此获得能够高密度的磁记录介质 记录。 在一个实施例中，由磁性金属颗粒和非磁性材料制成的颗粒状磁性膜中的磁性金属颗粒通过层叠主要包含Co或Fe和Pt元素的铁磁性交换金属元素交替地获得，并且设置层压周期 在约0.35nm和0.9nm之间，优选在约0.4nm和0.55nm之间。