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1. 发明授权

US06317300B1 Magnetoresistive device having magnetoresistive film and magnetic bias film with side-end faces with different angles of inclination and having insulating film made of electrically insulating material 失效
标题翻译：具有磁阻膜的磁阻器件和具有不同倾斜角度的侧端面的磁偏置膜，并且具有由电绝缘材料制成的绝缘膜
公开(公告)号：US06317300B1
公开(公告)日：2001-11-13
申请号：US09347922
申请日：1999-07-06
申请人： Yoshitaka Sasaki , Hiroaki Kawashima
发明人： Yoshitaka Sasaki , Hiroaki Kawashima
IPC分类号： G11B539
CPC分类号： G11B5/3903 , G11B5/3967 , H01L43/08
摘要： An object of the invention is to minimize the difference in reproducing output of a magnetoresistive device for a reproducing head. An MR device which composes a reproducing head is formed as a laminated structure in which a SAL film, an insulating film and an MR film which is a magnetoresistive film are laminated. The side-end faces of the MR film slope toward the supporting surface of a base body and the side-end faces of the SAL film are formed substantially vertical to the supporting surface of the base body. An insulating film, which is provided in the related art, is not provided on the side-end faces of the MR film and the SAL film so as to make them directly in contact with a first electrode layer. The area of the side-end faces of the SAL film is sufficiently smaller than that of the MR film, and the ratio of both areas can be set to a constant value. The contact resistance between the SAL film and the first electrode layer is sufficiently larger than the current flowing in the MR film and the first electrode layer, and the current flowing in the SAL film becomes sufficiently smaller than that of the MR film. Further, the ratio of the amount of the current flowing in the SAL film to that of the current flowing in the MR film becomes constant and difference in the reproducing output can be suppressed.
摘要翻译：本发明的目的是最小化用于再现头的磁阻装置的再现输出的差异。组成再现头的MR器件形成为层压SAL膜，绝缘膜和作为磁阻膜的MR膜的叠层结构。 MR膜的侧端面朝向基体的支撑面倾斜并且SAL膜的侧端面形成为与基体的支撑面大致垂直。在MR膜和SAL膜的侧端面上没有设置相关技术中的绝缘膜，以使它们直接与第一电极层接触。 SAL膜的侧端面的面积比MR膜的面积小，可以将两个面积的比例设定为一定值。 SAL膜和第一电极层之间的接触电阻比在MR膜和第一电极层中流动的电流足够大，并且在SAL膜中流动的电流变得充分地小于MR膜的电流。此外，在SAL膜中流动的电流量与在MR膜中流动的电流的电流的比率变得恒定，并且可以抑制再现输出的差异。

2. 发明授权

US11410688B1 Thermally-assisted magnetic recording head having plasmon generator of multiple metal layers 有权
公开(公告)号：US11410688B1
公开(公告)日：2022-08-09
申请号：US17347992
申请日：2021-06-15
申请人： Yoshitaka Sasaki , Hiroyuki Ito , Shigeki Tanemura , Hironori Araki , Yoji Nomura , Yukinori Ikegawa , Weihao Xu
发明人： Yoshitaka Sasaki , Hiroyuki Ito , Shigeki Tanemura , Hironori Araki , Yoji Nomura , Yukinori Ikegawa , Weihao Xu
IPC分类号： G11B11/105 , G11B5/127 , G11B7/1387 , G11B5/60 , G11B5/00 , G11B5/48
摘要： A thermally-assisted magnetic recording head includes a medium facing surface, a main pole, a waveguide, and a plasmon generator. A second metal layer of the plasmon generator includes a second front end facing the medium facing surface. A third metal layer of the plasmon generator includes a narrow portion located on the second metal layer. The narrow portion includes a front end face located in the medium facing surface and configured to generate near-field light from a surface plasmon, and a rear end opposite the front end face. The rear end is located farther from the medium facing surface than is the second front end.

3. 发明授权

US11049516B1 Near-field light generator and thermally-assisted magnetic recording head 有权
公开(公告)号：US11049516B1
公开(公告)日：2021-06-29
申请号：US17069527
申请日：2020-10-13
申请人： Yukinori Ikegawa , Yoshitaka Sasaki , Hiroyuki Ito , Shigeki Tanemura , Yoji Nomura
发明人： Yukinori Ikegawa , Yoshitaka Sasaki , Hiroyuki Ito , Shigeki Tanemura , Yoji Nomura
IPC分类号： G11B5/39 , G11B5/48 , G11B5/187 , G11B5/00
摘要： A near-field light generator includes a plasmon generator including a plasmon exciting portion on which a surface plasmon is excited, and a near-field transducer including a front end face that generates near-field light from the surface plasmon. The near-field transducer is formed of a first metal material. The plasmon generator includes a first portion formed of the first metal material and a second portion formed of a second metal material. The first portion is in contact with the near-field transducer. The second portion includes at least part of the plasmon exciting portion.

4. 发明授权

US10803888B1 Magnetic head including spin torque oscillator and manufacturing method for the same 有权
公开(公告)号：US10803888B1
公开(公告)日：2020-10-13
申请号：US16574880
申请日：2019-09-18
申请人： Yoshitaka Sasaki , Hiroyuki Ito , Kazuki Sato , Shigeki Tanemura , Hironori Araki , Yoji Nomura , Tetsuya Roppongi , Atsushi Yamaguchi
发明人： Yoshitaka Sasaki , Hiroyuki Ito , Kazuki Sato , Shigeki Tanemura , Hironori Araki , Yoji Nomura , Tetsuya Roppongi , Atsushi Yamaguchi
IPC分类号： G11B5/115 , G11B5/39 , C23F4/04
摘要： A manufacturing method for a magnetic head includes the steps of: forming a main pole; forming a spin torque oscillator; and forming a trailing shield. The step of forming the spin torque oscillator includes: a step of forming a layered film; a step of forming an interposition layer; a step of forming a mask; a first etching step of etching a portion of the interposition layer using the mask; a second etching step of etching a portion of the layered film using the mask and the interposition layer as an etching mask; a step of removing the interposition layer and the mask; and a patterning step of patterning the layered film into the spin torque oscillator.

5. 发明授权

US10062402B1 Waveguide including first and second layers and manufacturing method thereof 有权
公开(公告)号：US10062402B1
公开(公告)日：2018-08-28
申请号：US15830818
申请日：2017-12-04
申请人： Hironori Araki , Yoshitaka Sasaki , Hiroyuki Ito , Shigeki Tanemura , Seiichiro Tomita , Masakazu Okada
发明人： Hironori Araki , Yoshitaka Sasaki , Hiroyuki Ito , Shigeki Tanemura , Seiichiro Tomita , Masakazu Okada
IPC分类号： G11B7/135 , G11B5/60 , G11B5/31 , H01P3/16 , G11B5/127 , H01P1/17 , G11B5/00
CPC分类号： G11B5/6088 , G11B5/1278 , G11B5/3116 , G11B5/314 , G11B2005/0021 , H01P1/174 , H01P3/16
摘要： A manufacturing method for a waveguide includes forming a core including a first layer and a second layer. The first layer has a top surface including a first region with which a bottom surface of the second layer is in contact, and a second region with which the bottom surface of the second layer is not in contact. Forming the core includes the steps of: forming an initial first layer; forming an etching stopper layer on the second region of the initial first layer; forming an initial second layer on the initial first layer and the etching stopper layer; etching the initial second layer and the initial first layer so as to make the initial first layer into the first layer; and etching the initial second layer until the etching stopper layer is exposed, so as to make the initial second layer into the second layer.

6. 发明授权

US09812156B2 Thermally-assisted magnetic recording head including a main pole and a plasmon generator 有权
公开(公告)号：US09812156B2
公开(公告)日：2017-11-07
申请号：US14600460
申请日：2015-01-20
申请人： Yoshitaka Sasaki , Hiroyuki Ito , Shigeki Tanemura , Hideo Mamiya , Hironori Araki , Seiichiro Tomita
发明人： Yoshitaka Sasaki , Hiroyuki Ito , Shigeki Tanemura , Hideo Mamiya , Hironori Araki , Seiichiro Tomita
IPC分类号： G11B5/127 , G11B5/31 , G11B5/60 , G11B5/00 , G11B5/012
CPC分类号： G11B5/314 , G11B5/012 , G11B5/127 , G11B5/1272 , G11B5/6088 , G11B2005/0021
摘要： A thermally-assisted magnetic recording head includes a main pole and a plasmon generator. The main pole has a front end face located in the medium facing surface. The plasmon generator has a near-field light generating surface located in the medium facing surface. The front end face of the main pole includes a first end face portion and a second end face portion. The second end face portion is located farther from the near-field light generating surface than is the first end face portion, and is greater than the first end face portion in width in the track width direction. The first end face portion and the near-field light generating surface are equal in width.

7. 发明授权

US09754614B1 Plasmon generator including a heat sink layer interposed between two portions formed of different metal materials 有权
公开(公告)号：US09754614B1
公开(公告)日：2017-09-05
申请号：US15244556
申请日：2016-08-23
申请人： Yoshitaka Sasaki , Hiroyuki Ito , Yukinori Ikegawa , Shigeki Tanemura , Hideo Mamiya , Seiichiro Tomita
发明人： Yoshitaka Sasaki , Hiroyuki Ito , Yukinori Ikegawa , Shigeki Tanemura , Hideo Mamiya , Seiichiro Tomita
IPC分类号： G11B5/02 , G11B11/00 , G11B5/39 , G02B5/00 , G02B6/122 , G11B5/48 , G11B5/00
CPC分类号： G02B6/1226 , G11B5/3133 , G11B5/314 , G11B5/6088 , G11B2005/0021
摘要： A plasmon generator includes: a first portion formed of a first metal material and including a front end face configured to generate near-field light; a second portion formed of a second metal material and located at a distance from the front end face; and a heat sink layer formed of a third metal material, located at a distance from the front end face and interposed between the first portion and the second portion. The second metal material is lower in Vickers hardness and higher in thermal conductivity than the first metal material. The third metal material has a thermal conductivity higher than that of each of the first and second metal materials, and has a Vickers hardness lower than that of the first metal material and higher than that of the second metal material.

8. 发明授权

US09542960B2 Thermally-assisted magnetic recording head including a main pole, a plasmon generator and two side shields 有权
标题翻译：热辅助磁记录头包括主极，等离子体激元发生器和两个侧面屏蔽
公开(公告)号：US09542960B2
公开(公告)日：2017-01-10
申请号：US14720319
申请日：2015-05-22
申请人： Yoshitaka Sasaki , Hiroyuki Ito , Shigeki Tanemura , Kazuki Sato , Hideo Mamiya , Kenichi Takano
发明人： Yoshitaka Sasaki , Hiroyuki Ito , Shigeki Tanemura , Kazuki Sato , Hideo Mamiya , Kenichi Takano
IPC分类号： G11B11/00 , G11B5/31 , G11B5/48 , G11B5/00 , G11B11/105 , G11B5/60
CPC分类号： G11B5/315 , G11B5/314 , G11B5/3163 , G11B5/6088 , G11B11/10534 , G11B11/10536 , G11B11/10543 , G11B2005/0021
摘要： A thermally-assisted magnetic recording head includes a main pole, a plasmon generator, and first and second side shields. The main pole has a front end face located in the medium facing surface. The plasmon generator has a near-field light generating surface located in the medium facing surface. The front end face of the main pole includes a first end face portion, and a second end face portion greater in width than the first end face portion. The first and second side shields have first and second side shield end faces located on opposite sides of at least part of the near-field light generating surface and at least part of the first end face portion in the track width direction.
摘要翻译：热辅助磁记录头包括主极，等离子体激元发生器以及第一和第二侧屏蔽。主杆具有位于介质面对表面中的前端面。等离子体发生器具有位于介质面对表面中的近场光产生表面。主极的前端面包括第一端面部分和宽度大于第一端面部分的第二端面部分。第一和第二侧面屏蔽具有位于近场光产生表面的至少一部分的相对侧上的第一和第二侧屏蔽端面以及轨道宽度方向上的第一端面部分的至少一部分。

9. 发明授权

US09495980B1 Magnetic head for perpendicular magnetic recording with a coil including two coil portions 有权
标题翻译：用于具有包括两个线圈部分的线圈的垂直磁记录磁头
公开(公告)号：US09495980B1
公开(公告)日：2016-11-15
申请号：US14886900
申请日：2015-10-19
申请人： Yoshitaka Sasaki , Hiroyuki Ito , Kazuki Sato , Hironori Araki , Kazumasa Yasuda , Kenichi Takano
发明人： Yoshitaka Sasaki , Hiroyuki Ito , Kazuki Sato , Hironori Araki , Kazumasa Yasuda , Kenichi Takano
IPC分类号： G11B5/127 , G11B5/39
CPC分类号： G11B5/1278 , G11B5/3116 , G11B5/3123
摘要： A magnetic head includes a coil, a main pole and a return path section. The return path section includes a yoke section, and a coupling section coupling the yoke section to the main pole. The coil includes a first coil portion surrounding at least part of an outer peripheral surface of the coupling section, and a second coil portion surrounding at least part of the entire perimeter of the main pole as viewed from the medium facing surface. The winding of the coil includes a common portion used in common to form part of the first coil portion and part of the second coil portion.
摘要翻译：磁头包括线圈，主极和返回路径部分。返回通路部分包括轭部，以及将轭部连接到主极的耦合部。线圈包括围绕耦合部分的外周表面的至少一部分的第一线圈部分和围绕从介质面向表面观察的主极的整个周边的至少一部分的第二线圈部分。线圈的绕组包括共同使用的共同部分，以形成第一线圈部分的一部分和第二线圈部分的一部分。

10. 发明授权

US09030776B1 Magnetic head for perpendicular magnetic recording including a main pole and a shield 有权
标题翻译：用于垂直磁记录的磁头，包括主极和屏蔽
公开(公告)号：US09030776B1
公开(公告)日：2015-05-12
申请号：US14107714
申请日：2013-12-16
申请人： Yoshitaka Sasaki , Hiroyuki Ito , Kazuki Sato , Shigeki Tanemura , Yukinori Ikegawa , Hironori Araki , Tatsuya Shimizu
发明人： Yoshitaka Sasaki , Hiroyuki Ito , Kazuki Sato , Shigeki Tanemura , Yukinori Ikegawa , Hironori Araki , Tatsuya Shimizu
IPC分类号： G11B5/39 , G11B5/11 , G11B5/17
CPC分类号： G11B5/11 , G11B5/17 , G11B5/3116 , G11B5/3123 , G11B5/3143 , G11B5/315
摘要： A magnetic head includes a main pole, a write shield, and first and second nonmagnetic layers. The main pole has a top surface including an inclined surface portion. The inclined surface portion includes a first portion and a second portion, the first portion being closer to a medium facing surface. The write shield includes an inclined portion facing toward the top surface of the main pole. The first nonmagnetic layer is interposed between the inclined portion and the second portion of the inclined surface portion. The second nonmagnetic layer is interposed between the inclined portion and a combination of the first portion of the inclined surface portion and the first nonmagnetic layer.
摘要翻译：磁头包括主极，写屏蔽以及第一和第二非磁性层。主极具有包括倾斜表面部分的顶表面。倾斜表面部分包括第一部分和第二部分，第一部分更靠近介质面向表面。写入屏蔽包括面向主极的顶表面的倾斜部分。第一非磁性层插入倾斜部分和倾斜表面部分的第二部分之间。第二非磁性层介于倾斜部分和倾斜表面部分的第一部分与第一非磁性层的组合之间。

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