公开(公告)号：US07431999B2

公开(公告)日：2008-10-07

申请号：US11081937

申请日：2005-03-17

申请人： Takeshi Iwasaki ,  Akira Kikitsu ,  Soichi Oikawa ,  Tomoyuki Maeda

发明人： Takeshi Iwasaki ,  Akira Kikitsu ,  Soichi Oikawa ,  Tomoyuki Maeda

IPC分类号： G11B5/66

CPC分类号： G11B5/7325 ,  G11B5/656

摘要： Disclosed is a perpendicular magnetic recording medium including: a nonmagnetic substrate; a first underlayer formed on the nonmagnetic substrate, mainly composed of at least two kinds selected from a group consisting of Fe2O3, Co3O4, MgO, MoO3, Mn3O4, SiO2, Al2O3, TiO2, and ZrO2, and having crystal grains growing in a columnar shape and crystal grain boundaries surrounding the crystal grains; a nonmagnetic second underlayer formed on the first underlayer and having crystal grains with one of a face-centered cubic structure and a hexagonal close-packed structure growing on the crystal grains of the first underlayer; a magnetic layer formed on the second underlayer; and a protective film formed on the magnetic layer.

摘要翻译： 公开了一种垂直磁记录介质，包括：非磁性基板; 形成在非磁性基底上的第一底层，主要由选自Fe 2 O 3 O 3，Co 3 N 3， O 4，MgO，MoO 3，Mn 3 O 4，SiO 2， ，Al 2 O 3，TiO 2和ZrO 2，并且具有生长成柱状的晶粒 和晶粒周围的晶界; 在第一底层上形成非磁性第二底层，并且具有生长在第一底层的晶粒上的面心立方结构和六方密堆积结构之一的晶粒; 形成在所述第二底层上的磁性层; 以及形成在磁性层上的保护膜。

公开(公告)号：US07375977B2

公开(公告)日：2008-05-20

申请号：US11000281

申请日：2004-11-30

申请人： Tomoyuki Maeda ,  Hideaki Matsushima

发明人： Tomoyuki Maeda ,  Hideaki Matsushima

IPC分类号： H05K1/18

CPC分类号： H01F17/0013 ,  H01F2017/002 ,  Y10T29/49002 ,  Y10T29/4902 ,  Y10T29/49071 ,  Y10T29/49073 ,  Y10T29/49078 ,  Y10T29/4913 ,  Y10T29/49155

摘要： A multilayered electronic component that is easy to manufacture and that has excellent electrical characteristics includes end portions of coil wiring patterns that oppose a coil connection electrode that is displaced on the surface of a second ceramic layer due to an increase or decrease in the number of first ceramic layers. A coil connection electrode has a shape in which surface portions of second ceramic layers or opposed second ceramic layers having the first ceramic layers disposed in between are connected to the end portions of the coil wiring patterns that oppose the respective coil connection electrode, which are displaced due to the increase or decrease in the number of the first ceramic layers. A connection wiring pattern has a shape in which one portion of a coil connection electrode is connected to one portion of an external extension electrode connection pattern.

摘要翻译： 容易制造并且具有优异的电特性的多层电子部件包括由于第一陶瓷层的数量的增加或减少而在第二陶瓷层的表面上位移的线圈连接电极的线圈布线图案的端部 陶瓷层。 线圈连接电极具有这样的形状，其中具有设置在其间的第一陶瓷层的第二陶瓷层或相对的第二陶瓷层的表面部分连接到与相应的线圈连接电极相对的线圈布线图案的端部， 由于第一陶瓷层的数量的增加或减少。 连接布线图形具有线圈连接电极的一部分连接到外部延伸电极连接图案的一部分的形状。

公开(公告)号：US07289298B2

公开(公告)日：2007-10-30

申请号：US10793950

申请日：2004-03-08

申请人： Tomoyuki Maeda ,  Takashi Hikosaka ,  Futoshi Nakamura ,  Takeshi Iwasaki ,  Hiroshi Sakai ,  Kenji Shimizu ,  Akira Sakawaki

发明人： Tomoyuki Maeda ,  Takashi Hikosaka ,  Futoshi Nakamura ,  Takeshi Iwasaki ,  Hiroshi Sakai ,  Kenji Shimizu ,  Akira Sakawaki

IPC分类号： G11B5/66

CPC分类号： G11B5/65 ,  G11B5/653 ,  G11B5/656

摘要： Disclosed is a magnetic recording medium which includes a substrate, an underlayer, and a perpendicular magnetic recording layer, and in which this perpendicular magnetic recording layer contains magnetic crystal grains and a matrix surrounding the magnetic crystal grains, and the matrix contains an element selected from Zn, Cd, Al, Ga, and In, and a component selected from P, As, Sb, S, Se, and Te.

摘要翻译： 公开了一种磁记录介质，其包括基板，底层和垂直磁记录层，并且其中该垂直磁记录层包含磁性晶粒和围绕磁性晶粒的基体，并且该基体包含选自以下的元素： Zn，Cd，Al，Ga和In以及选自P，As，Sb，S，Se和Te的成分。

公开(公告)号：US20070141401A1

公开(公告)日：2007-06-21

申请号：US11640979

申请日：2006-12-19

申请人： Tomoyuki Maeda ,  Migaku Takahashi ,  Masahiro Oka

发明人： Tomoyuki Maeda ,  Migaku Takahashi ,  Masahiro Oka

IPC分类号： G11B5/65 ,  G11B5/66

CPC分类号： G11B5/7325 ,  G11B5/1278 ,  G11B5/82

摘要： According to one embodiment, a multilayered underlayer including a first underlayer containing Cu aligned in a (111) plane and a second underlayer formed on the Cu underlayer and containing Cu and nitrogen as main components is formed.

摘要翻译： 根据一个实施方案，形成包含在（111）面中排列的Cu的第一底层和形成在Cu底层上并含有Cu和氮作为主要成分的第二底层的多层底层。

公开(公告)号：US20070072012A1

公开(公告)日：2007-03-29

申请号：US10564316

申请日：2004-07-13

申请人： Futoshi Nakamura ,  Soichi Oikawa ,  Takeshi Iwasaki ,  Tomoyuki Maeda ,  Kenji Shimizu ,  Hiroshi Sakai

发明人： Futoshi Nakamura ,  Soichi Oikawa ,  Takeshi Iwasaki ,  Tomoyuki Maeda ,  Kenji Shimizu ,  Hiroshi Sakai

IPC分类号： G11B5/66

CPC分类号： G11B5/667 ,  G11B5/656 ,  G11B5/7325 ,  G11B5/7379

摘要： To provide a magnetic recording medium having a magnetic recording layer consisting of fine crystal grains with improved orientation. The soft magnetic layer 3, the seed layer 4, the under layer 5 and the magnetic recording layer 7 are formed successively on the non-magnetic substrate 1, wherein the seed layer 4 is made of a material containing Ni, the under layer 5 has a grain isolation type structure in which grains made of a non-magnetic material are isolated in a non-magnetic matrix and the non-magnetic matrix is made of a material containing Y2O3. With this constitution, the under layer 5 has improved characteristics in terms of uniformity of grains, sharpness of grain boundary, fineness of the grains and crystal orientation, and therefore the magnetic recording layer 7 that is formed on the under layer also has improved characteristics in terms of uniformity of grains, sharpness of grain boundary, fineness of the grains and crystal orientation. As a result, medium noise and coercive force are improved, thus making high density recording possible.

摘要翻译： 提供一种具有由具有改进的取向的细晶粒构成的磁记录层的磁记录介质。 软磁性层3，种子层4，底层5和磁记录层7依次形成在非磁性基板1上，其中种子层4由含有Ni的材料制成，底层5具有 一种颗粒隔离型结构，其中由非磁性材料制成的颗粒在非磁性基质中分离，非磁性基质由含有Y 2 O 3的材料制成， / SUB>。 利用这种结构，底层5在晶粒均匀性，晶界锐度，晶粒细度和晶体取向方面具有改进的特性，因此形成在下层上的磁记录层7也具有改善的特性 晶粒均匀度，晶界锐度，晶粒细度和晶体取向等。 结果，中等噪声和矫顽力得到改善，从而使得高密度记录成为可能。

公开(公告)号：US20060141292A1

公开(公告)日：2006-06-29

申请号：US11312429

申请日：2005-12-21

申请人： Takeshi Iwasaki ,  Akira Kikitsu ,  Soichi Oikawa ,  Tomoyuki Maeda

发明人： Takeshi Iwasaki ,  Akira Kikitsu ,  Soichi Oikawa ,  Tomoyuki Maeda

IPC分类号： G11B5/66

CPC分类号： G11B5/667 ,  G11B5/7325

摘要： At least three underlayers, i.e., a first underlayer containing, as a main component, at least one element selected from Ag, Ir, Ni, Pd, Pt, Rh, Hf, Re, Ru, Ti, Ta, Zr, Mg, and Al, a second underlayer containing Mg or Al and Si, and a third underlayer containing, as a main component, at least one element selected from Pt, Pd, Ru, Rh, Co, and Ti, are formed between a substrate and magnetic recording layer.

摘要翻译： 至少有三个底层，即含有选自Ag，Ir，Ni，Pd，Pt，Rh，Hf，Re，Ru，Ti，Ta，Zr，Mg中的至少一种元素作为主要成分的第一底层， Al，含有Mg或Al和Si的第二底层和含有选自Pt，Pd，Ru，Rh，Co和Ti中的至少一种元素作为主要成分的第三底层形成在基板和磁记录 层。

公开(公告)号：US20050214591A1

公开(公告)日：2005-09-29

申请号：US11080487

申请日：2005-03-16

申请人： Tomoyuki Maeda ,  Akira Kikitsu ,  Soichi Oikawa ,  Takeshi Iwasaki

发明人： Tomoyuki Maeda ,  Akira Kikitsu ,  Soichi Oikawa ,  Takeshi Iwasaki

IPC分类号： G11B5/738 ,  G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/667 ,  G11B5/73 ,  G11B5/84 ,  G11B5/851

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

摘要： A magnetic recording layer is formed on an under-layer comprising a Cu crystalline grain layer and a deposited nitrogen atom layer on the Cu crystalline grain layer surface. Then the magnetic recording layer comprising very small average grain diameter and sharp grain diameter distribution is obtained. The magnetic recording medium comprising the magnetic recording layer shows excellent signal to noise ratio at high density recording.

摘要翻译： 在Cu晶粒层表面上的包含Cu晶粒层和沉积的氮原子层的下层上形成磁记录层。 然后获得包含非常小的平均粒径和尖锐的粒径分布的磁记录层。 包括磁记录层的磁记录介质在高密度记录时显示出优异的信噪比。

公开(公告)号：US20050214590A1

公开(公告)日：2005-09-29

申请号：US11076114

申请日：2005-03-09

申请人： Tomoyuki Maeda ,  Akira Kikitsu ,  Soichi Oikawa ,  Takeshi Iwasaki

发明人： Tomoyuki Maeda ,  Akira Kikitsu ,  Soichi Oikawa ,  Takeshi Iwasaki

IPC分类号： G11B5/738 ,  G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/667 ,  G11B5/73 ,  H01F10/16 ,  H01F41/18

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

摘要： A large grain diameter under-layer of at least one selected from Cu, Ni or Rh, comprising large average diameter crystalline grains of 50 nm or more than 50 nm with the (100) crystal plane of the grains oriented parallel to the substrate surface, was formed on a substrate. Then, a magnetic recording layer was deposited on the under-layer. The magnetic recording medium carrying this structure showed very small magnetic crystalline grains in magnetic layer, and excellent overwrite characteristics and signal to noise ratio at high recording density.

摘要翻译： 由Cu，Ni或Rh中选出的至少一种的大粒径底层，其中平均直径为100nm的平均直径的晶粒大于50nm或大于50nm， 形成在基板上。 然后，磁记录层沉积在底层上。 携带这种结构的磁记录介质在磁性层中显示出非常小的磁晶粒，并且在高记录密度下具有优异的重写特性和信噪比。

公开(公告)号：US20050214588A1

公开(公告)日：2005-09-29

申请号：US11081937

申请日：2005-03-17

申请人： Takeshi Iwasaki ,  Akira Kikitsu ,  Soichi Oikawa ,  Tomoyuki Maeda

发明人： Takeshi Iwasaki ,  Akira Kikitsu ,  Soichi Oikawa ,  Tomoyuki Maeda

IPC分类号： G11B5/738 ,  G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/667 ,  G11B5/73 ,  H01F10/16

CPC分类号： G11B5/7325 ,  G11B5/656

摘要： Disclosed is a perpendicular magnetic recording medium including: a nonmagnetic substrate; a first underlayer formed on the nonmagnetic substrate, mainly composed of at least two kinds selected from a group consisting of Fe2O3, CO3O4, MgO, MoO3, Mn3O4, SiO2, Al2O3, TiO2, and ZrO2, and having crystal grains growing in a columnar shape and crystal grain boundaries surrounding the crystal grains; a nonmagnetic second underlayer formed on the first underlayer and having crystal grains with one of a face-centered cubic structure and a hexagonal close-packed structure growing on the crystal grains of the first underlayer; a magnetic layer formed on the second underlayer; and a protective film formed on the magnetic layer.

摘要翻译： 公开了一种垂直磁记录介质，包括：非磁性基板; 形成在非磁性基底上的第一底层，主要由选自Fe 2 O 3 O 3，CO 3 3， O 4，MgO，MoO 3，Mn 3 O 4，SiO 2， ，Al 2 O 3，TiO 2和ZrO 2，并且具有生长成柱状的晶粒 和晶粒周围的晶界; 在第一底层上形成非磁性第二底层，并且具有生长在第一底层的晶粒上的面心立方结构和六方密堆积结构之一的晶粒; 形成在所述第二底层上的磁性层; 以及形成在磁性层上的保护膜。

公开(公告)号：US06930847B2

公开(公告)日：2005-08-16

申请号：US10236931

申请日：2002-09-09

申请人： Tadashi Kai ,  Akira Kikitsu ,  Toshihiko Nagase ,  Tomoyuki Maeda ,  Junichi Akiyama

发明人： Tadashi Kai ,  Akira Kikitsu ,  Toshihiko Nagase ,  Tomoyuki Maeda ,  Junichi Akiyama

IPC分类号： G11B5/65 ,  G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/127 ,  G11B5/64 ,  G11B5/66 ,  G11B5/73 ,  G11B11/10 ,  G11B11/105 ,  G11B13/04

CPC分类号： G11B5/7325 ,  G11B5/00 ,  G11B5/012 ,  G11B5/127 ,  G11B5/64 ,  G11B13/045 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/0021

摘要： A magnetic recording-reproducing apparatus has a magnetic recording medium having a nonmagnetic substrate, and a functional layer and a recording layer formed on the nonmagnetic substrate, the recording layer exhibiting a magnetic anisotropy energy density KuRL, the functional layer developing ferromagnetism upon irradiation with light so as to exhibit a magnetic anisotropy energy density KuFL lower than the magnetic anisotropy energy density KuRL and the functional layer serving to lower the magnetic anisotropy energy density of the recording layer through exchange coupling interaction with the recording layer when the functional layer is irradiated with light, a light source which irradiates the functional layer with light, and a magnetic head having a writing head writing signal magnetization by applying a magnetic field to the recording layer and a reading head reading the signal magnetization recorded in the recording layer.

摘要翻译： 磁记录再现装置具有磁记录介质，其具有非磁性基板，以及在非磁性基板上形成的功能层和记录层，所述记录层呈现磁各向异性能量密度Ku <！ - SIPO 的功能层，而功能层用于降低 当功能层被光照射时通过与记录层的交换耦合相互作用的记录层的磁各向异性能量密度，用光照射功能层的光源以及具有写入头写入信号磁化的磁头通过施加 记录层的磁场和读取记录在记录层中的信号磁化的读取头。