公开(公告)号：US07359147B2

公开(公告)日：2008-04-15

申请号：US10825049

申请日：2004-04-15

Applicant: Kiyoshi Nishikawa ,  Maki Maeda

Inventor： Kiyoshi Nishikawa ,  Maki Maeda

IPC: G11B5/31 ,  G11B5/23 ,  G11B5/39

CPC classification number: G11B5/31

Abstract: A thin film magnetic head has a magnetic pole major layer terminated at a position receding from a medium-opposed surface. An intermediate magnetic layer extends forward toward the medium-opposed surface from the surface of the magnetic pole major layer. The intermediate magnetic layer is terminated at a position receding from the medium-opposed surface. A tip magnetic layer extends to the medium-opposed surface from the surface of the intermediate magnetic layer so as to expose the front end at the medium-opposed surface. The layered structure serves to diminish variation in the sectional area of the path of the magnetic flux. Saturation of magnetic flux is sufficiently suppressed irrespective of the reduction in the sectional area. Even if the tip magnetic layer is reduced in lateral width, the tip magnetic layer allows a sufficient leakage of magnetic flux from the front end.

Abstract translation: 薄膜磁头具有终止于从介质相对表面退出的位置处的磁极主要层。 中间磁性层从磁极主层的表面向中间相对表面向前延伸。 中间磁性层终止于从介质相对表面退出的位置。 尖端磁性层从中间磁性层的表面延伸到介质相对表面，以使中间相对表面的前端露出。 层状结构用于减小磁通的路径的截面积的变化。 充分抑制磁通的饱和，而与截面积的减小无关。 即使尖端磁性层横向宽度减小，尖端磁性层允许从前端充分泄漏磁通量。

公开(公告)号：US20050135007A1

公开(公告)日：2005-06-23

申请号：US10825049

申请日：2004-04-15

Applicant: Kiyoshi Nishikawa ,  Maki Maeda

Inventor： Kiyoshi Nishikawa ,  Maki Maeda

IPC: G11B5/31 ,  G11B5/127 ,  G11B5/147 ,  G11B5/33

CPC classification number: G11B5/31

Abstract: A thin film magnetic head has a magnetic pole major layer terminated at a position receding from a medium-opposed surface. An intermediate magnetic layer extends forward toward the medium-opposed surface from the surface of the magnetic pole major layer. The intermediate magnetic layer is terminated at a position receding from the medium-opposed surface. A tip magnetic layer extends to the medium-opposed surface from the surface of the intermediate magnetic layer so as to expose the front end at the medium-opposed surface. The layered structure serves to diminish variation in the sectional area of the path of the magnetic flux. Saturation of magnetic flux is sufficiently suppressed irrespective of the reduction in the sectional area. Even if the tip magnetic layer is reduced in lateral width, the tip magnetic layer allows a sufficient leakage of magnetic flux from the front end.

Abstract translation: 薄膜磁头具有终止于从介质相对表面退出的位置处的磁极主要层。 中间磁性层从磁极主层的表面向中间相对表面向前延伸。 中间磁性层终止于从介质相对表面退出的位置。 尖端磁性层从中间磁性层的表面延伸到介质相对表面，以使中间相对表面的前端露出。 层状结构用于减小磁通的路径的截面积的变化。 充分抑制磁通的饱和，而与截面积的减小无关。 即使尖端磁性层横向宽度减小，尖端磁性层允许从前端充分泄漏磁通量。

公开(公告)号：US07402348B2

公开(公告)日：2008-07-22

申请号：US11088241

申请日：2005-03-23

Applicant: Hiroto Takeshita ,  Maki Maeda ,  Takuya Uzumaki

Inventor： Hiroto Takeshita ,  Maki Maeda ,  Takuya Uzumaki

IPC: G11B5/66

CPC classification number: G11B5/66 ,  G11B5/012 ,  G11B5/656 ,  G11B2005/0029 ,  Y10T428/24975

Abstract: A magnetic recording layer is formed on an auxiliary magnetic layer in a perpendicular magnetic recording medium. The auxiliary magnetic layer has the axis of easy magnetization in the vertical direction perpendicular to the surface of a substrate. The perpendicular magnetic recording medium reliably allows establishment of the magnetization in the auxiliary magnetic layer in the vertical direction. When a magnetic flux flows along the vertical direction perpendicular to the surface of the magnetic recording layer, the magnetic flux flows across the magnetic recording layer in the vertical direction. The magnetization is thus reliably established in the magnetic recording layer in the vertical direction. The magnetic field of a stronger intensity is thus leaked out of the magnetic recording layer in the vertical direction.

Abstract translation: 在垂直磁记录介质中的辅助磁性层上形成磁记录层。 辅助磁性层在垂直于衬底表面的垂直方向具有容易磁化的轴。 垂直磁记录介质可靠地允许在垂直方向上建立辅助磁性层中的磁化。 当磁通量沿垂直于磁记录层表面的垂直方向流动时，磁通量在垂直方向上流过磁记录层。 因此磁化在磁记录层中沿垂直方向可靠地建立。 因此，较强的强度的磁场在垂直方向从磁记录层泄漏出来。

公开(公告)号：US20050196649A1

公开(公告)日：2005-09-08

申请号：US11091937

申请日：2005-03-28

Applicant: Ryosaku Inamura ,  Hiroto Takeshita ,  Toshio Sugimoto ,  Kazumasa Shimoda ,  Takenori Oshima ,  Maki Maeda ,  Takuya Uzumaki ,  Atsushi Tanaka

Inventor： Ryosaku Inamura ,  Hiroto Takeshita ,  Toshio Sugimoto ,  Kazumasa Shimoda ,  Takenori Oshima ,  Maki Maeda ,  Takuya Uzumaki ,  Atsushi Tanaka

IPC: B32B1/00 ,  G11B5/64 ,  G11B5/65 ,  G11B5/667 ,  G11B5/73

CPC classification number: B32B1/00 ,  G11B5/65 ,  G11B5/667 ,  G11B5/7325

Abstract: A perpendicular magnetic recording medium includes a magnetic orientation controller layer serving as a layer for controlling crystalline orientation in an upper layer. A non-magnetic orientation controller layer extends on the surface of the magnetic orientation controller layer The non-magnetic orientation controller layer serves as a layer for controlling crystalline orientation in an upper layer. A magnetic recording layer extends on the surface of the non-magnetic orientation controller layer. The perpendicular magnetic recording medium allows a reliable establishment of a uniform crystalline orientation in the magnetic recording layer based on the influences from the magnetic and non-magnetic orientation controller layers. A reliable establishment of a uniform crystalline orientation can be achieved without an increase in the thickness of the non-magnetic orientation controller layer.

Abstract translation: 垂直磁记录介质包括用作控制上层结晶取向层的磁性取向控制层。 非磁性取向控制层在磁性取向控制层的表面上延伸。非磁性取向控制层用作控制上层结晶取向的层。 磁记录层在非磁性取向控制层的表面上延伸。 垂直磁记录介质基于来自磁和非磁性取向控制层的影响，允许在磁记录层中可靠地建立均匀的晶体取向。 可以在不增加非磁性取向控制层的厚度的情况下实现均匀结晶取向的可靠建立。

公开(公告)号：US07147940B2

公开(公告)日：2006-12-12

申请号：US10346342

申请日：2003-01-17

Applicant: Maki Maeda ,  Hiroto Takeshita ,  Takuya Uzumaki

Inventor： Maki Maeda ,  Hiroto Takeshita ,  Takuya Uzumaki

IPC: G11B5/66 ,  G11B5/70

CPC classification number: G11B5/66

Abstract: The present invention provides a perpendicular magnetic recording medium that reduces medium noise and achieves thermal stability of recording magnetization. This perpendicular magnetic recording medium has a substrate and a recording layer formed by single-layered magnetic nanoparticles that are aligned at uniform intervals. An auxiliary magnetic film that is thinner than the recording layer is interposed between the substrate and the recording layer. The magnetization of the magnetic nanoparticles is secured by the exchange interaction effect of the auxiliary magnetic film.

公开(公告)号：US08630064B2

公开(公告)日：2014-01-14

申请号：US13294816

申请日：2011-11-11

Applicant: Maki Maeda ,  Kimitoshi Eto ,  Hiromi Shiina ,  Kazue Kudo ,  Masafumi Mochizuki

Inventor： Maki Maeda ,  Kimitoshi Eto ,  Hiromi Shiina ,  Kazue Kudo ,  Masafumi Mochizuki

IPC: G11B5/11 ,  G11B5/187

CPC classification number: G11B5/3116 ,  G11B5/1278

Abstract: A magnetic write head having a gap structure that improves write head performance. The write head includes a magnetic write pole and a magnetic shield that is separated from the trailing edge of the write pole by a non-magnetic trailing gap layer and is separated from the sides of the write pole by non-magnetic side gap layers. The trailing gap extends laterally beyond the side gap layers, and a convex bump is formed at an edge of the magnetic shield at a location near the trailing end of each of the side gap layers.

Abstract translation: 具有提高写头性能的间隙结构的磁写头。 写磁头包括磁写磁极和磁屏蔽，其通过非磁性后隙间隔层与写磁极的后缘分离，并且通过非磁性侧间隙层与写磁极的侧面分离。 拖尾间隙横向延伸超过侧间隙层，并且在靠近每个侧间隙层的后端的位置处在磁屏蔽的边缘处形成凸起凸起。

公开(公告)号：US20130120876A1

公开(公告)日：2013-05-16

申请号：US13294816

申请日：2011-11-11

Applicant: Maki Maeda ,  Kimitoshi Eto ,  Hiromi Shiina ,  Kazue Kudo ,  Masafumi Mochizuki

Inventor： Maki Maeda ,  Kimitoshi Eto ,  Hiromi Shiina ,  Kazue Kudo ,  Masafumi Mochizuki

IPC: G11B5/10

CPC classification number: G11B5/3116 ,  G11B5/1278

Abstract: A magnetic write head having a gap structure that improves write head performance. The write head includes a magnetic write pole and a magnetic shield that is separated from the trailing edge of the write pole by a non-magnetic trailing gap layer and is separated from the sides of the write pole by non-magnetic side gap layers. The trailing gap extends laterally beyond the side gap layers, and a convex bump is formed an edge of the magnetic shield at a location near the trailing end of the side gap layers.

Abstract translation: 具有提高写头性能的间隙结构的磁写头。 写磁头包括磁写磁极和磁屏蔽，其通过非磁性后隙间隔层与写磁极的后缘分离，并且通过非磁性侧间隙层与写磁极的侧面分离。 拖尾间隙横向延伸超过侧间隙层，并且在靠近侧间隙层的后端的位置处形成凸形凸起的磁屏蔽的边缘。

公开(公告)号：US20050249982A1

公开(公告)日：2005-11-10

申请号：US11088241

申请日：2005-03-23

Applicant: Hiroto Takeshita ,  Maki Maeda ,  Takuya Uzumaki

Inventor： Hiroto Takeshita ,  Maki Maeda ,  Takuya Uzumaki

IPC: G11B5/00 ,  G11B5/012 ,  G11B5/64 ,  G11B5/66 ,  G11B5/667 ,  G11B5/673

CPC classification number: G11B5/66 ,  G11B5/012 ,  G11B5/656 ,  G11B2005/0029 ,  Y10T428/24975

Abstract: A magnetic recording layer is formed on an auxiliary magnetic layer in a perpendicular magnetic recording medium. The auxiliary magnetic layer has the axis of easy magnetization in the vertical direction perpendicular to the surface of a substrate. The perpendicular magnetic recording medium reliably allows establishment of the magnetization in the auxiliary magnetic layer in the vertical direction. When a magnetic flux flows along the vertical direction perpendicular to the surface of the magnetic recording layer, the magnetic flux flows across the magnetic recording layer in the vertical direction. The magnetization is thus reliably established in the magnetic recording layer in the vertical direction. The magnetic field of a stronger intensity is thus leaked out of the magnetic recording layer in the vertical direction.

Abstract translation: 在垂直磁记录介质中的辅助磁性层上形成磁记录层。 辅助磁性层在垂直于衬底表面的垂直方向具有容易磁化的轴。 垂直磁记录介质可靠地允许在垂直方向上建立辅助磁性层中的磁化。 当磁通量沿垂直于磁记录层表面的垂直方向流动时，磁通量在垂直方向上流过磁记录层。 因此磁化在磁记录层中沿垂直方向可靠地建立。 因此，较强的强度的磁场在垂直方向从磁记录层泄漏出来。

公开(公告)号：US08577072B2

公开(公告)日：2013-11-05

申请号：US13299525

申请日：2011-11-18

Applicant: Kiyoshi Watanabe ,  Maki Maeda

Inventor： Kiyoshi Watanabe ,  Maki Maeda

IPC: H04R1/02

CPC classification number: H04R1/2896 ,  H04R2499/15

Abstract: In an electronic device, a speaker attaching section 17 which is vertically open with respect to a circuit board 10 and into which a speaker 16 is press-fitted is integrally formed on a contact sheet 13 arranged on the circuit board 10 provided inside an upper case 8. Therefore, the speaker 16 can be easily attached in a manner that sound therefrom does not leak, simply by the speaker 16 being press-fitted into the speaker attaching section 17 of the contact sheet 13. Accordingly, in the present invention, the structure of the speaker section 6 is simple and the number of its components is small, whereby the thickness of the speaker section 6 can be reduced. In addition, sound generated by the speaker can be favorably and reliably emitted from the speaker attaching section 17 to the outside of the upper case 8, without chattering noise being generated.

Abstract translation: 在电子设备中，相对于电路板10垂直打开且扬声器16被压配的扬声器安装部17一体形成在布置在设置在上壳体内的电路板10上的接触片13上 因此，简单地将扬声器16压配合到接触片13的扬声器安装部17中，扬声器16可以容易地以其声音不泄漏的方式安装。因此，在本发明中， 扬声器部分6的结构简单，并且其部件的数量小，从而可以减小扬声器部分6的厚度。 此外，扬声器产生的声音可以从扬声器安装部分17被有利地可靠地发射到上壳体8的外部，而不产生振动噪声。

公开(公告)号：US06835444B2

公开(公告)日：2004-12-28

申请号：US09976767

申请日：2001-10-12

Applicant: Maki Maeda ,  Hiroto Takeshita ,  Takuya Uzumaki ,  Atsushi Tanaka

Inventor： Maki Maeda ,  Hiroto Takeshita ,  Takuya Uzumaki ,  Atsushi Tanaka

IPC: G11B566

CPC classification number: G11B5/66 ,  G11B5/855 ,  Y10T428/24967 ,  Y10T428/265 ,  Y10T428/31

Abstract: A magnetic recording medium is provided. The magnetic recording medium comprises an in-plane magnetic film used for recording, and a perpendicular magnetic film formed on the in-plane magnetic film. The in-plane magnetic film has a magnetization easy axis in an in-plane direction. The perpendicular magnetic film has a magnetization easy axis oriented in a direction perpendicular to the magnetization easy axis of the in-plane magnetic film. A tBr (a product of a thickness and a residual magnetization) of the perpendicular magnetic film is set so as not to exceed one-fifth of a tBr of the in-plane magnetic film at the maximum.

Abstract translation: 提供磁记录介质。 磁记录介质包括用于记录的面内磁性膜和形成在面内磁性膜上的垂直磁性膜。 面内磁性膜在面内方向具有易磁化轴。 垂直磁性膜具有在与面内磁性膜的易磁化轴垂直的方向上取向的易磁化磁化轴。 垂直磁性膜的tBr（厚度和剩余磁化强度）被设定为不超过平面内磁性膜的tBr的五分之一。