公开(公告)号：US08792271B2

公开(公告)日：2014-07-29

申请号：US13282605

申请日：2011-10-27

Applicant: Hirofumi Morise ,  Hideaki Fukuzawa ,  Akira Kikitsu ,  Yoshiaki Fukuzumi

Inventor： Hirofumi Morise ,  Hideaki Fukuzawa ,  Akira Kikitsu ,  Yoshiaki Fukuzumi

IPC: G11C11/15

CPC classification number: H01L43/08 ,  G11C11/16 ,  G11C11/161 ,  G11C11/1673 ,  G11C11/1675 ,  G11C11/1693 ,  H01F10/3236 ,  H01F10/325 ,  H01F10/3254 ,  H01F10/3286 ,  H01F10/3295 ,  H01L27/228 ,  H01L41/0986 ,  H01L41/12 ,  H01L43/10

Abstract: A magnetic memory device comprises a first electrode, a second electrode, a laminated structure comprising plural first magnetic layers being provided between the first electrode and the second electrode, a second magnetic layer comprising different composition elements from that of the first magnetic layer and being provided between plural first magnetic layers, a piezoelectric body provided on a opposite side to a side where the first electrode is provided in the laminated structure, and a third electrode applying voltage to the piezoelectric body and provided on a different position from a position where the first electrode is provided in the piezoelectric body.

Abstract translation: 磁存储器件包括第一电极，第二电极，层叠结构，其包括设置在第一电极和第二电极之间的多个第一磁性层，第二磁性层包括与第一磁性层不同的组成元素， 在多个第一磁性层之间，在层压结构中设置在与设置有第一电极的一侧相反的一侧的压电体，以及将第三电极向压电体施加电压，并且设置在与第一电极的位置不同的位置， 电极设置在压电体中。

公开(公告)号：US08298690B2

公开(公告)日：2012-10-30

申请号：US12292564

申请日：2008-11-20

Applicant: Hiroyuki Hieda ,  Kazuto Kashiwagi ,  Akira Kikitsu ,  Yousuke Isowaki ,  Yoshiyuki Kamata

Inventor： Hiroyuki Hieda ,  Kazuto Kashiwagi ,  Akira Kikitsu ,  Yousuke Isowaki ,  Yoshiyuki Kamata

IPC: G11B5/65

CPC classification number: G11B5/82 ,  B82Y10/00 ,  G11B5/743 ,  G11B5/746 ,  G11B5/855 ,  G11B5/865 ,  G11B2005/0029

Abstract: A magnetic recording medium includes a disk substrate, and recording cells arrayed on the disk substrate in a track direction, the recording cells includes a ferromagnetic pattern and a magnetic pattern formed on one of two sidewalls of the ferromagnetic pattern in the track direction and having a lower crystalline magnetic anisotropy constant Ku than that of the ferromagnetic pattern.

Abstract translation: 磁记录介质包括磁盘基板和磁道基板上沿轨道方向排列的记录单元，记录单元包括铁磁图案和形成在轨道方向的铁磁图案的两个侧壁中的一个侧壁上的磁性图案，并且具有 比铁磁性图案低的结晶磁各向异性常数Ku。

公开(公告)号：US08221637B2

公开(公告)日：2012-07-17

申请号：US12829450

申请日：2010-07-02

Applicant: Yoshiyuki Kamata ,  Katsuyuki Naito ,  Akira Kikitsu ,  Masatoshi Sakurai ,  Masahiro Oka

Inventor： Yoshiyuki Kamata ,  Katsuyuki Naito ,  Akira Kikitsu ,  Masatoshi Sakurai ,  Masahiro Oka

IPC: C23C14/46

CPC classification number: C23F4/00 ,  B82Y10/00 ,  G11B5/012 ,  G11B5/743 ,  G11B5/82 ,  G11B5/855 ,  H01J2237/30466 ,  H01J2237/3174

Abstract: According to one embodiment, a method for manufacturing a magnetic recording medium includes forming patterns having protrusions and recesses of a ferromagnetic material onto a recording track section and a servo section on a substrate, forming a flattening film, a top surface of which is higher than that of the protrusion of the ferromagnetic material, onto the ferromagnetic material, and performing ion beam etching onto the flattening film up to a top surface of the protrusion of the ferromagnetic material, and determining an end point of flattening etching on the basis of a change in the total number of incident particles by means of an ion counter installed so as to be at an angle θ with respect to a perpendicular direction to the substrate in accordance with a material of the flattening film.

Abstract translation: 根据一个实施例，一种制造磁记录介质的方法包括将具有铁磁材料的突起和凹陷的图案形成在记录轨道部分和基板上的伺服部分上，形成平坦化膜，其顶表面高于 将铁磁材料的突出部分突出到铁磁材料上，并且对平坦化膜进行离子束蚀刻直到铁磁材料的突起的顶表面，并且基于变化确定平坦化蚀刻的终点 在通过以与角度为角度安装的离子计数器的入射颗粒的总数中; 相对于基板的垂直方向，根据平坦化膜的材料。

公开(公告)号：US08116035B2

公开(公告)日：2012-02-14

申请号：US11917088

申请日：2006-06-09

Applicant: Migaku Takahashi ,  Masahiro Oka ,  Akira Kikitsu

Inventor： Migaku Takahashi ,  Masahiro Oka ,  Akira Kikitsu

IPC: G11B5/74 ,  G11B5/66

CPC classification number: H01F10/3227 ,  G11B5/65 ,  G11B5/66 ,  G11B5/855 ,  H01F10/007 ,  H01F10/16 ,  H01F10/3286

Abstract: The invention provides a magnetic recording medium, and a magnetic recording and reproducing apparatus. The magnetic recording medium includes a substrate 11, an under layer 12 formed on the substrate 11, a magnetic recording layer 13 formed on the under layer 12, and a protective layer 14 formed on the magnetic recording layer 13. The magnetic recording layer 13 is composed of a primary recording layer 14 and a secondary recording layer 15 which are mutually exchange-coupled. The primary recording layer 14 has magnetic grains and a nonmagnetic material that surrounds the magnetic grains, and has a perpendicular magnetic anisotropy. The secondary recording layer 15 is made of a material having a negative crystal magnetic anisotropy and its easy plane of the magnetization is a plane of the medium.

Abstract translation: 本发明提供一种磁记录介质和磁记录和重放装置。 磁记录介质包括基板11，形成在基板11上的底层12，形成在下层12上的磁记录层13和形成在磁记录层13上的保护层14。磁记录层13 由相互交换耦合的主记录层14和辅助记录层15组成。 主记录层14具有磁性粒子和围绕磁性粒子的非磁性材料，并且具有垂直的磁各向异性。 辅助记录层15由具有负晶体磁各向异性的材料制成，其易磁化平面是介质的平面。

公开(公告)号：US08077416B2

公开(公告)日：2011-12-13

申请号：US12730912

申请日：2010-03-24

Applicant: Masatoshi Sakurai ,  Seiji Morita ,  Akira Kikitsu ,  Yoshiyuki Kamata

Inventor： Masatoshi Sakurai ,  Seiji Morita ,  Akira Kikitsu ,  Yoshiyuki Kamata

IPC: G11B5/09 ,  G11B20/12

CPC classification number: B82Y10/00 ,  G11B5/743 ,  G11B5/746 ,  G11B5/82 ,  G11B5/865

Abstract: A magnetic recording medium has a RAM region and a ROM region. The RAM region includes a plurality of first tracks each having a first magnetic portion. The first magnetic portions in adjacent tracks are separated from each other. The ROM region includes a plurality of second tracks each having a second magnetic portion. A width of the second magnetic portions in a direction perpendicular to a track direction of the first tracks is larger than that of the first magnetic portions in the perpendicular direction.

Abstract translation: 磁记录介质具有RAM区域和ROM区域。 RAM区域包括多个具有第一磁性部分的第一轨道。 相邻轨道中的第一磁性部分彼此分离。 ROM区域包括多个具有第二磁性部分的第二磁道。 第二磁性部分在与第一磁道的轨道方向垂直的方向上的宽度大于垂直方向上的第一磁性部分的宽度。

公开(公告)号：US07983004B2

公开(公告)日：2011-07-19

申请号：US11822132

申请日：2007-07-02

Applicant: Satoshi Shirotori ,  Masatoshi Sakurai ,  Yoshiyuki Kamata ,  Akira Kikitsu

Inventor： Satoshi Shirotori ,  Masatoshi Sakurai ,  Yoshiyuki Kamata ,  Akira Kikitsu

IPC: G11B5/82

CPC classification number: G11B5/855 ,  B82Y10/00 ,  G11B5/743

Abstract: According to one embodiment, there is provided a magnetic recording media including a substrate, and a magnetic recording layer including magnetic film patterns formed in a protruded form on the substrate, sidewalls of the magnetic film patterns having at least two faces of different slope angles.

Abstract translation: 根据一个实施例，提供一种包括基板的磁记录介质和包括在基板上形成为突出形状的磁膜图案的磁记录层，磁膜图案的侧壁具有至少两个不同倾斜角的面。

公开(公告)号：US07771602B2

公开(公告)日：2010-08-10

申请号：US11475873

申请日：2006-06-28

Applicant: Yoshiyuki Kamata ,  Katsuyuki Naito ,  Akira Kikitsu ,  Masatoshi Sakurai ,  Masahiro Oka

Inventor： Yoshiyuki Kamata ,  Katsuyuki Naito ,  Akira Kikitsu ,  Masatoshi Sakurai ,  Masahiro Oka

IPC: B05D5/12 ,  B05D3/00 ,  B44C1/22 ,  C23F1/00

CPC classification number: C23F4/00 ,  B82Y10/00 ,  G11B5/012 ,  G11B5/743 ,  G11B5/82 ,  G11B5/855 ,  H01J2237/30466 ,  H01J2237/3174

Abstract: According to one embodiment, a method for manufacturing a magnetic recording medium includes forming patterns having protrusions and recesses of a ferromagnetic material onto a recording track section and a servo section on a substrate, forming a flattening film, a top surface of which is higher than that of the protrusion of the ferromagnetic material, onto the ferromagnetic material, and performing ion beam etching onto the flattening film up to a top surface of the protrusion of the ferromagnetic material, and determining an end point of flattening etching on the basis of a change in the total number of incident particles by means of an ion counter installed so as to be at an angle θ with respect to a perpendicular direction to the substrate in accordance with a material of the flattening film.

Abstract translation: 根据一个实施例，一种制造磁记录介质的方法包括将具有铁磁材料的突起和凹陷的图案形成在记录轨道部分和基板上的伺服部分上，形成平坦化膜，其顶表面高于 将铁磁材料的突出部分突出到铁磁材料上，并且对平坦化膜进行离子束蚀刻直到铁磁材料的突起的顶表面，并且基于变化确定平坦化蚀刻的终点 在通过以与角度为角度安装的离子计数器的入射颗粒的总数中; 相对于基板的垂直方向，根据平坦化膜的材料。

公开(公告)号：US20100177425A1

公开(公告)日：2010-07-15

申请号：US12730912

申请日：2010-03-24

Applicant: Masatoshi SAKURAI ,  Seiji Morita ,  Akira Kikitsu ,  Yoshiyuki Kamata

Inventor： Masatoshi SAKURAI ,  Seiji Morita ,  Akira Kikitsu ,  Yoshiyuki Kamata

IPC: G11B5/09

CPC classification number: B82Y10/00 ,  G11B5/743 ,  G11B5/746 ,  G11B5/82 ,  G11B5/865

Abstract: A magnetic recording medium has a RAM region and a ROM region. The RAM region includes a plurality of first tracks each having a first magnetic portion. The first magnetic portions in adjacent tracks are separated from each other. The ROM region includes a plurality of second tracks each having a second magnetic portion. A width of the second magnetic portions in a direction perpendicular to a track direction of the first tracks is larger than that of the first magnetic portions in the perpendicular direction.

Abstract translation: 磁记录介质具有RAM区域和ROM区域。 RAM区域包括多个具有第一磁性部分的第一轨道。 相邻轨道中的第一磁性部分彼此分离。 ROM区域包括多个具有第二磁性部分的第二磁道。 第二磁性部分在与第一磁道的轨道方向垂直的方向上的宽度大于垂直方向上的第一磁性部分的宽度。

公开(公告)号：US07494725B2

公开(公告)日：2009-02-24

申请号：US11085622

申请日：2005-03-22

Applicant: Tomoyuki Maeda ,  Akira Kikitsu ,  Soichi Oikawa ,  Takeshi Iwasaki

Inventor： Tomoyuki Maeda ,  Akira Kikitsu ,  Soichi Oikawa ,  Takeshi Iwasaki

IPC: G11B5/66

CPC classification number: G11B5/667 ,  G11B5/65 ,  G11B5/7325

Abstract: A grain diameter controlling crystalline layer comprising crystalline grains of a metal selected from the group consisting essentially of Cu, Ni, Rh and Pt was formed on a substrate. Then, deposited atom layer of at least one element selected from the group consisting of oxygen and carbon was formed on the surface of the grain diameter control layer. A magnetic recording layer was deposited on the atoms deposited grain diameter controlling crystalline layer. Then a magnetic recording medium in which the magnetic crystalline grains has small grain diameter and small grain diameter distribution, and the magnetic recording medium shows increased signal to noise ratio at high recording density.

Abstract translation: 在基板上形成包含选自Cu，Ni，Rh和Pt中的金属的晶粒的晶粒直径控制晶体层。 然后，在粒径控制层的表面上形成从由氧和碳组成的组中选出的至少一种元素的沉积原子层。 在原子沉积粒径控制晶体层上沉积磁记录层。 然后是其中磁晶粒具有小的粒径和小的粒径分布的磁记录介质，并且磁记录介质在高记录密度下显示增加的信噪比。

公开(公告)号：US20090034119A1

公开(公告)日：2009-02-05

申请号：US11886635

申请日：2006-03-29

Applicant: Migaku Takahashi ,  Masahiro Oka ,  Akira Kikitsu

Inventor： Migaku Takahashi ,  Masahiro Oka ,  Akira Kikitsu

IPC: G11B5/127 ,  G11B5/667

CPC classification number: G11B5/667 ,  H01F10/16 ,  H01F10/30

Abstract: The invention provides a perpendicular recording medium with high recording density, and a magnetic recording and reproducing apparatus, by improving the function of magnetic anisotropy of a soft magnetic underlayer. The perpendicular recording medium has at least a soft magnetic underlayer and a perpendicular magnetic recording layer on a non-magnetic substrate, wherein when Ku⊥ (erg/cm3) is defined as a perpendicular magnetic anisotropic energy, and Ms (emu/cm 3) is defined as a saturation magnetization of the soft magnetic underlayer, Ku⊥ of the soft magnetic underlayer has a negative value and Ku⊥

Abstract translation: 通过提高软磁性底层的磁各向异性的功能，本发明提供了具有高记录密度的垂直记录介质和磁记录和再现装置。 垂直记录介质在非磁性基板上至少具有软磁性底层和垂直磁记录层，其中当Ku⊥（erg / cm3）被定义为垂直磁各向异性能时，Ms（emu / cm 3） 定义为软磁性底层的饱和磁化强度，软磁性底层的Ku⊥为负值，Ku⊥<-2piMs2。 结果，软磁性底层的易磁化轴在基板表面平坦地取向，这有效地抑制了WATE现象和尖峰噪声。