Magnetic recording medium and magnetic recording apparatus
    1.
    发明授权
    Magnetic recording medium and magnetic recording apparatus 失效
    磁记录介质和磁记录装置

    公开(公告)号:US07348077B2

    公开(公告)日:2008-03-25

    申请号:US10930755

    申请日:2004-09-01

    IPC分类号: G11B5/66 G11B5/70

    摘要: A magnetic recording medium based on the perpendicular magnetic recording system includes a substrate; a back layer which is formed on the substrate and which is formed of a soft magnetic material; an in-plane magnetized layer which is formed on the back layer and which has in-plane magnetization; and a recording layer which is formed on the in-plane magnetized layer and which has perpendicular magnetization, wherein the in-plane magnetized layer has a coercivity in an in-plane direction larger than a magnetic field generated by residual magnetization in a perpendicular direction of the recording layer. The influence on the reproduction output, caused by the mirror image effect of the soft magnetic back layer is reduced in wide range recording densities, thereby improving the resolution by decreasing the difference between the reproduction outputs of the magnetic recording medium at the low recording density and at the high recording density.

    摘要翻译: 基于垂直磁记录系统的磁记录介质包括基板; 背衬层,其形成在所述基板上并且由软磁性材料形成; 面内磁化层,其形成在背层上并具有面内磁化; 以及形成在所述面内磁化层上并且具有垂直磁化的记录层,其中所述面内磁化层的面内方向的矫顽力大于在垂直方向上的残余磁化产生的磁场的矫顽力 录音层。 在宽范围的记录密度下,由软磁背层的镜像效果引起的对再现输出的影响减小,从而通过将低记录密度的磁记录介质的再现输出与 在高记录密度。

    Magnetic recording medium, method for producing the same, and magnetic recording apparatus
    2.
    发明授权
    Magnetic recording medium, method for producing the same, and magnetic recording apparatus 失效
    磁记录介质,其制造方法和磁记录装置

    公开(公告)号:US07226674B2

    公开(公告)日:2007-06-05

    申请号:US10765049

    申请日:2004-01-28

    IPC分类号: G11B5/66 G11B5/70

    CPC分类号: G11B5/851 G11B5/656 G11B5/66

    摘要: A magnetic recording medium based on the perpendicular magnetic recording system has a substrate which is formed of a non-magnetic material, a soft magnetic back layer which is formed of a soft magnetic material and which is formed on the substrate, an underlayer which is formed on the soft magnetic back layer, and a recording layer which is formed of an alloy magnetic material which is mainly composed of CoPtCr and contains an oxide, and which is formed on the underlayer. The recording layer is formed of two or more magnetic layers having different oxide contents, and the layer, which is included in the two or more magnetic layers for constructing the recording layer and which is provided on a side nearest to the underlayer, has the highest oxide content in the recording layer. The magnetic recording medium has more excellent magnetic characteristics with less medium noise.

    摘要翻译: 基于垂直磁记录系统的磁记录介质具有由非磁性材料形成的基板,由软磁性材料形成并形成在基板上的软磁性背层,形成的下层 以及由主要由CoPtCr组成并含有氧化物的合金磁性材料形成并形成在底层上的记录层。 记录层由具有不同氧化物含量的两个或更多个磁性层形成,并且包含在用于构造记录层的两个或更多个磁性层中并且设置在最靠近底层的一侧的层具有最高的 记录层中的氧化物含量。 磁记录介质具有更优异的磁特性,较少的中等噪声。

    Magnetic recording medium and magnetic recording apparatus
    3.
    发明申请
    Magnetic recording medium and magnetic recording apparatus 失效
    磁记录介质和磁记录装置

    公开(公告)号:US20050048321A1

    公开(公告)日:2005-03-03

    申请号:US10930755

    申请日:2004-09-01

    IPC分类号: G11B5/64 G11B5/66 G11B5/667

    摘要: A magnetic recording medium based on the perpendicular magnetic recording system includes a substrate; a back layer which is formed on the substrate and which is formed of a soft magnetic material; an in-plane magnetized layer which is formed on the back layer and which has in-plane magnetization; and a recording layer which is formed on the in-plane magnetized layer and which has perpendicular magnetization, wherein the in-plane magnetized layer has a coercivity in an in-plane direction larger than a magnetic field generated by residual magnetization in a perpendicular direction of the recording layer. The influence on the reproduction output, caused by the mirror image effect of the soft magnetic back layer is reduced in wide range recording densities, thereby improving the resolution by decreasing the difference between the reproduction outputs of the magnetic recording medium at the low recording density and at the high recording density.

    摘要翻译: 基于垂直磁记录系统的磁记录介质包括基板; 背衬层,其形成在所述基板上并且由软磁性材料形成; 面内磁化层,其形成在背层上并具有面内磁化; 以及形成在所述面内磁化层上并且具有垂直磁化的记录层,其中所述面内磁化层的面内方向的矫顽力大于在垂直方向上的残余磁化产生的磁场的矫顽力 录音层。 在宽范围的记录密度下,由软磁背层的镜像效果引起的对再现输出的影响减小,从而通过将低记录密度的磁记录介质的再现输出与 在高记录密度。

    Magnetic recording medium, method for producing the same, and magnetic recording apparatus
    4.
    发明授权
    Magnetic recording medium, method for producing the same, and magnetic recording apparatus 失效
    磁记录介质,其制造方法和磁记录装置

    公开(公告)号:US06863998B2

    公开(公告)日:2005-03-08

    申请号:US10307301

    申请日:2002-12-02

    摘要: A magnetic recording medium 100 comprises, on a substrate 1, a first orientation control layer 2, a second orientation control layer 4, a soft magnetic layer 6, a non-magnetic layer 8, a recording layer 12, and a carbon protective layer 14. The recording layer 12 is formed of an FePt ordered alloy phase which exhibits ferromagnetism and an FePt3 ordered alloy phase which exhibits paramagnetism. Accordingly, the magnetic coupling force, which acts between those of the FePt ordered alloy phase, is broken by the paramagnetic FePt3 ordered alloy phase. The magnetic interaction between those of the FePt ordered alloy phase is reduced, and thus the noise is reduced. Further, the high density recording can be performed, and the medium is excellent in thermal stability, because the FePt ordered alloy having high crystalline magnetic anisotropy is used for the recording layer 12.

    摘要翻译: 磁记录介质100在基板1上包括第一取向控制层2,第二取向控制层4,软磁层6,非磁性层8,记录层12和碳保护层14 记录层12由显示铁磁性的FePt有序合金相和显示顺磁性的FePt 3有序合金相形成。 因此,作用于FePt有序合金相的磁耦合力被顺磁性FePt3有序合金相破坏。 FePt有序合金相的磁相互作用减小,噪声降低。 此外,可以进行高密度记录,并且由于具有高结晶磁各向异性的FePt有序合金用于记录层12,介质的热稳定性优异。

    Magnetic recording medium and magnetic recording apparatus
    5.
    发明授权
    Magnetic recording medium and magnetic recording apparatus 失效
    磁记录介质和磁记录装置

    公开(公告)号:US06866948B2

    公开(公告)日:2005-03-15

    申请号:US10665016

    申请日:2003-09-22

    摘要: A magnetic recording medium based on the perpendicular recording system, which has high coercivity and low medium noise, is provided by using an underlayer which has a thin film thickness and which makes it possible to improve the orientation of a recording layer. The magnetic recording medium based on the perpendicular recording system has the recording layer which is formed of a CoPtCr alloy magnetic film containing oxygen. The magnetic recording medium has such a structure that an adhesive layer 2, a soft magnetic back layer 3, the underlayer 4, the recording layer 5, and a protective layer 6 are successively stacked on a substrate 1. A CoCrRu film, which has a film thickness of 5 nm to 20 nm, is used as the underlayer for the recording layer formed of the CoPtCr alloy magnetic film containing oxygen. Thus, it is possible to improve the crystalline orientation of the recording layer with the underlayer having the thin film thickness.

    摘要翻译: 通过使用具有薄膜厚度的底层并且可以改善记录层的取向,提供了基于具有高矫顽力和低中等噪声的垂直记录系统的磁记录介质。 基于垂直记录系统的磁记录介质具有由含有氧的CoPtCr合金磁性膜形成的记录层。 磁记录介质具有粘结剂层2,软磁性背层3,底层4,记录层5和保护层6依次层叠在基板1上的结构。一种CoCrRu膜,其具有 使用5nm〜20nm的膜厚作为由含有氧的CoPtCr合金磁性膜形成的记录层的底层。 因此,可以改善具有薄膜厚度的底层的记录层的结晶取向。

    Magnetic recording medium and magnetic recording apparatus
    6.
    发明授权
    Magnetic recording medium and magnetic recording apparatus 失效
    磁记录介质和磁记录装置

    公开(公告)号:US06846583B2

    公开(公告)日:2005-01-25

    申请号:US10356465

    申请日:2003-02-03

    摘要: A magnetic recording medium comprises a magnetic recording layer 63 which is formed by using an ordered alloy containing B on a substrate 1 containing an amorphous component. A part of B in the ordered alloy is segregated in a grain boundary, and thus the magnetic interaction, which acts between magnetic grains, can be reduced. Accordingly, it is possible to form fine and minute magnetic domains in the magnetic recording layer 63, and it is possible to reduce the medium noise as well. The temperature, at which the substrate is heated during the film formation of the magnetic recording layer 63, can be suppressed to be low, because the ordering temperature for the ordered alloy containing B is lower than those of ordered alloys not containing B. Therefore, it is possible to use a substrate made of glass which is suitable for the mass production. The magnetic recording layer 63 is also excellent in thermal stability because of the use of the ordered alloy having high magnetic anisotropy. According to the present invention, it is possible to provide the magnetic recording medium for high density recording which is excellent in thermal stability and which involves low medium noise.

    摘要翻译: 磁记录介质包括磁记录层63,磁记录层63通过在含有非晶成分的基板1上使用含有B的有序合金而形成。 有序合金中的B的一部分在晶界中分离,因此可以减小在磁性颗粒之间作用的磁相互作用。 因此,可以在磁记录层63中形成精细和微小的磁畴,并且也可以降低介质噪声。 由于含有B的有序合金的有序温度低于不含B的有序合金的排序温度,所以在磁记录层63的成膜期间加热基板的温度可以被抑制得较低。因此, 可以使用适合于批量生产的玻璃制的基板。 由于使用具有高磁各向异性的有序合金,磁记录层63的热稳定性也优异。 根据本发明,可以提供热稳定性优异且介质噪音低的高密度记录用磁记录介质。

    IMPRINTING JIG AND IMPRINTING APPARATUS
    7.
    发明申请
    IMPRINTING JIG AND IMPRINTING APPARATUS 失效
    喷漆和印花装置

    公开(公告)号:US20080241307A1

    公开(公告)日:2008-10-02

    申请号:US12046791

    申请日:2008-03-12

    IPC分类号: B29C59/00

    摘要: The invention provides an imprinting jig for transferring a pattern onto a thermoplastic sheet. The imprinting jig is provided with: a first die having a surface with a pattern; a die holder for supporting the first die; an elastic member placed between the first die and the die holder; and a second die opposing to the first die. The thermoplastic sheet is placed on the surface with the pattern of the first die. The imprinting jig optionally includes an adhesion reducing means between the elastic member and the first die or between the elastic member and the die holder.

    摘要翻译: 本发明提供了一种用于将图案转印到热塑性片材上的压印夹具。 压印夹具具有:具有图案的表面的第一模具; 用于支撑第一模具的模座; 放置在第一模具和模座之间的弹性构件; 以及与第一管芯相对的第二管芯。 将热塑性片材放置在具有第一模具的图案的表面上。 压印夹具可选地包括在弹性构件和第一模具之间或弹性构件和模座之间的粘合减小装置。