公开(公告)号：US20080218902A1

公开(公告)日：2008-09-11

申请号：US12036716

申请日：2008-02-25

申请人： Kazumasa Hosono ,  Yukinori Ikegawa ,  Masaya Kato ,  Masashi Yanagawa ,  Kaoru Yamakawa ,  Takashi Ito

发明人： Kazumasa Hosono ,  Yukinori Ikegawa ,  Masaya Kato ,  Masashi Yanagawa ,  Kaoru Yamakawa ,  Takashi Ito

IPC分类号： G11B5/127

CPC分类号： G11B5/3133 ,  G11B5/1278 ,  G11B5/3163 ,  G11B5/3193

摘要： A magnetic head has a main magnetic pole made of at least a magnetic material and a coil. The main magnetic pole has a stop layer through an inorganic insulating layer on both sides of the main magnetic pole in the widthwise direction. The boundary between the main magnetic pole and the metal layer becomes clear by the intervention of the inorganic insulating layer when viewing the flattened pattern plane by a scanning electron microscope and measuring the width of the main magnetic pole as a core width. The measurement accuracy of the main magnetic pole width can be improved and reductions in manufacturing yield rates which occur due to measurement errors can be prevented.

摘要翻译： 磁头具有由至少磁性材料和线圈制成的主磁极。 主磁极在宽度方向上通过主磁极两侧的无机绝缘层具有停止层。 通过扫描电子显微镜观察平坦化图案平面并测量主磁极的宽度作为芯宽度时，通过无机绝缘层的介入，主磁极和金属层之间的边界变得清晰。 可以提高主磁极宽度的测量精度，并且可以防止由测量误差引起的制造成品率的降低。

公开(公告)号：US11604313B2

公开(公告)日：2023-03-14

申请号：US17364588

申请日：2021-06-30

申请人： Yukinori Ikegawa ,  Dayu Zhou ,  Koji Shimazawa ,  Yoshitaka Sasaki ,  Hiroyuki Ito ,  Yoji Nomura

发明人： Yukinori Ikegawa ,  Dayu Zhou ,  Koji Shimazawa ,  Yoshitaka Sasaki ,  Hiroyuki Ito ,  Yoji Nomura

IPC分类号： G02B6/122 ,  G02B6/136 ,  G11B5/012 ,  G11B13/08 ,  G11B5/00 ,  G02B6/12

摘要： A waveguide includes a core and a cladding. The core has an inlet on which light is incident. The core includes a front portion and a rear portion located between the front portion and the inlet. The front portion and the rear portion each have a thickness that is a dimension in a first direction and a width that is a dimension in a second direction. The first direction is orthogonal to a propagation direction of the light. The second direction is orthogonal to the propagation direction of the light and the first direction. The thickness of the front portion decreases with increasing distance from the inlet.

公开(公告)号：US09489969B1

公开(公告)日：2016-11-08

申请号：US14925365

申请日：2015-10-28

申请人： Yukinori Ikegawa ,  Yoshitaka Sasaki ,  Kazuki Sato ,  Shigeki Tanemura ,  Hironori Araki ,  Seiichiro Tomita

发明人： Yukinori Ikegawa ,  Yoshitaka Sasaki ,  Kazuki Sato ,  Shigeki Tanemura ,  Hironori Araki ,  Seiichiro Tomita

IPC分类号： G11B5/31 ,  G11B5/147 ,  G11B5/265

CPC分类号： G11B5/315 ,  G11B5/1278 ,  G11B5/23 ,  G11B5/3116 ,  G11B5/3163 ,  G11B5/3169

摘要： A magnetic head includes a main pole, a write shield and a gap section. The write shield includes a leading shield having a top surface opposed to a bottom end of the main pole. The gap section includes a leading gap section for separating the leading shield from the bottom end of the main pole. The leading gap section is formed using a first nonmagnetic layer and a second nonmagnetic layer. The first nonmagnetic layer has a first front end located closest to but at a distance from the medium facing surface. The second nonmagnetic layer has a second front end located in the medium facing surface.

摘要翻译： 磁头包括主极，写屏蔽和间隙部分。 写屏蔽包括具有与主极的底端相对的顶表面的前导屏蔽。 间隙部分包括用于将主屏蔽与主极的底端分离的前导间隙部分。 前导间隙部分使用第一非磁性层和第二非磁性层形成。 第一非磁性层具有位于与介质相对表面最近但距离介质相对表面一个距离的第一前端。 第二非磁性层具有位于介质相对表面中的第二前端。

公开(公告)号：US09230568B1

公开(公告)日：2016-01-05

申请号：US14688450

申请日：2015-04-16

申请人： Yukinori Ikegawa ,  Yoshitaka Sasaki ,  Hiroyuki Ito ,  Kazuki Sato ,  Shigeki Tanemura ,  Hironori Araki

发明人： Yukinori Ikegawa ,  Yoshitaka Sasaki ,  Hiroyuki Ito ,  Kazuki Sato ,  Shigeki Tanemura ,  Hironori Araki

IPC分类号： G11B5/127 ,  G11B5/17 ,  G11B5/187

CPC分类号： G11B5/1278 ,  G11B5/17 ,  G11B5/187 ,  G11B5/3116 ,  G11B5/3123 ,  G11B5/3163

摘要： A magnetic head includes a coil, a main pole, a trailing shield, a gap section, a return path section, and a coil underlayer. The main pole has a top surface including a first inclined portion and a flat portion. The coil includes a specific coil element. The specific coil element has a bottom surface facing toward the top surface of the main pole, and a front end face inclined with respect to a medium facing surface. The coil underlayer lies under the specific coil element, and has a front end face. The trailing shield includes a portion interposed between the front end face of the coil underlayer and the medium facing surface. The bottom surface of the specific coil element includes a second inclined portion.

摘要翻译： 磁头包括线圈，主极，后屏蔽，间隙部分，返回路径部分和线圈底层。 主极具有包括第一倾斜部和平坦部的顶面。 线圈包括特定的线圈元件。 特定线圈元件具有面向主极的顶表面的底表面和相对于介质面向表面倾斜的前端面。 线圈底层位于特定线圈元件下方，并具有前端面。 后挡板包括插入在线圈底层的前端面与介质面对表面之间的部分。 特定线圈元件的底面包括第二倾斜部分。

公开(公告)号：US09082422B2

公开(公告)日：2015-07-14

申请号：US14107701

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： G11B5/127 ,  G11B5/11 ,  G11B5/17 ,  G11B5/31

CPC分类号： G11B5/11 ,  G11B5/1278 ,  G11B5/17 ,  G11B5/3116 ,  G11B5/315 ,  G11B5/3163

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 write shield includes an inclined portion facing toward the top surface of the main pole. The first nonmagnetic layer is interposed between the inclined surface portion and the inclined portion. The second nonmagnetic layer is interposed between the first nonmagnetic layer and the inclined portion. The first nonmagnetic layer has a first front end located in a medium facing surface. The second nonmagnetic layer has a second front end that is located closest to but at a distance from the medium facing surface.

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。 写入屏蔽包括面向主极的顶表面的倾斜部分。 第一非磁性层插入在倾斜表面部分和倾斜部分之间。 第二非磁性层介于第一非磁性层和倾斜部分之间。 第一非磁性层具有位于介质相对表面中的第一前端。 第二非磁性层具有位于与介质相对表面最近但距离介质相对表面一定距离的第二前端。

公开(公告)号：US08416528B1

公开(公告)日：2013-04-09

申请号：US13463298

申请日：2012-05-03

申请人： Yoshitaka Sasaki ,  Hiroyuki Ito ,  Shigeki Tanemura ,  Kazuki Sato ,  Yukinori Ikegawa ,  Atsushi Iijima ,  Tatsuya Shimizu

发明人： Yoshitaka Sasaki ,  Hiroyuki Ito ,  Shigeki Tanemura ,  Kazuki Sato ,  Yukinori Ikegawa ,  Atsushi Iijima ,  Tatsuya Shimizu

IPC分类号： G11B5/127

CPC分类号： G11B5/1278 ,  G11B5/3116 ,  G11B5/3146 ,  G11B5/315 ,  G11B5/3163 ,  Y10T29/49048

摘要： A magnetic head includes a main pole and a return path section located above a top surface of a substrate. The main pole has an end face located in a medium facing surface. The return path section is located on the front side in the direction of travel of a recording medium relative to the main pole and is farther from the top surface of the substrate than is the main pole. The return path section has: a front end face located on the front side of the main pole in the medium facing surface; and an inclined surface located on the front side and connected to the front end face. The inclined surface is not exposed in the medium facing surface. An angle greater than 90° is formed between the front end face and the inclined surface.

摘要翻译： 磁头包括位于基板的顶表面上方的主极和返回路径部分。 主极具有位于面向介质的表面中的端面。 返回路径部分位于记录介质相对于主极的行进方向的前侧，并且比主极更远离基板的顶表面。 返回路径部分具有：位于介质面对表面中的主极的前侧上的前端面; 以及位于前侧并且连接到前端面的倾斜表面。 倾斜表面不会暴露在面向介质的表面上。 在前端面和倾斜面之间形成大于90°的角度。

公开(公告)号：US11514931B1

公开(公告)日：2022-11-29

申请号：US17677326

申请日：2022-02-22

申请人： Hironori Araki ,  Yoshitaka Sasaki ,  Tetsuhito Shinohara ,  Shigeki Tanemura ,  Kazuki Sato ,  Yoji Nomura ,  Yukinori Ikegawa ,  Tetsuya Roppongi

发明人： Hironori Araki ,  Yoshitaka Sasaki ,  Tetsuhito Shinohara ,  Shigeki Tanemura ,  Kazuki Sato ,  Yoji Nomura ,  Yukinori Ikegawa ,  Tetsuya Roppongi

IPC分类号： G11B5/31 ,  G11B5/127 ,  G11B5/39 ,  G11B5/235 ,  G11B5/00

摘要： A magnetic head includes a main pole, a trailing shield, and a spin torque oscillator. A top surface of the main pole includes a first inclined portion, a second inclined portion, and a third inclined portion arranged in order of closeness to a medium facing surface. Each of the first to third inclined portions has a front end closest to the medium facing surface and a rear end farthest from the medium facing surface. Each of the first to third inclined portions is inclined relative to the medium facing surface and a direction orthogonal to the medium facing surface so that its rear end is located forward relative to its front end in a direction of travel of a recording medium.

公开(公告)号：US11495251B1

公开(公告)日：2022-11-08

申请号：US17573945

申请日：2022-01-12

申请人： Yukinori Ikegawa ,  Yoshitaka Sasaki ,  Kazuki Sato ,  Shigeki Tanemura

发明人： Yukinori Ikegawa ,  Yoshitaka Sasaki ,  Kazuki Sato ,  Shigeki Tanemura

IPC分类号： G11B5/11 ,  G11B5/127 ,  G11B5/31

摘要： A write shield of a magnetic head includes a pair of first side shields and a pair of second side shields. The pair of first side shields each include a first side wall and a second side wall. The pair of second side shields each include a third side wall. The third side wall of one of the pair of second side shields is continuous with the first side wall of one of the pair of first side shields. The third side wall of the other of the pair of second side shields is continuous with the first side wall of the other of the pair of first side shields.

公开(公告)号：US10545287B1

公开(公告)日：2020-01-28

申请号：US16206058

申请日：2018-11-30

申请人： Yukinori Ikegawa ,  Yoshitaka Sasaki ,  Hiroyuki Ito ,  Shigeki Tanemura ,  Hironori Araki

发明人： Yukinori Ikegawa ,  Yoshitaka Sasaki ,  Hiroyuki Ito ,  Shigeki Tanemura ,  Hironori Araki

IPC分类号： G02B6/122 ,  G02B6/126 ,  G02B6/136 ,  G11B5/48 ,  G11B5/00

摘要： A manufacturing method for a waveguide includes forming a core including a first and a second layer. The first layer has a top surface including a first region opposed to a bottom surface of the second layer, and a second region not opposed to the bottom surface of the second layer. Forming the core includes a step of forming an initial first layer, an etching stopper layer on the second region of the top surface of the initial first layer, an initial second layer on the initial first layer and the etching stopper layer, and a step of etching the initial second layer until the etching stopper layer is exposed, to make the initial second layer into the second layer. A difference between the refractive index of the etching stopper layer and the core is smaller than or equal to 10% of the refractive index of the core.

公开(公告)号：US10366712B1

公开(公告)日：2019-07-30

申请号：US15880458

申请日：2018-01-25

申请人： Yoshitaka Sasaki ,  Hiroyuki Ito ,  Kazuki Sato ,  Hironori Araki ,  Yukinori Ikegawa ,  Yoji Nomura

发明人： Yoshitaka Sasaki ,  Hiroyuki Ito ,  Kazuki Sato ,  Hironori Araki ,  Yukinori Ikegawa ,  Yoji Nomura

IPC分类号： G11B5/11 ,  G11B5/127 ,  G11B5/31 ,  G11B5/60

摘要： A first side shield has a first sidewall and a second sidewall, and a second side shield has a third sidewall and a fourth sidewall. The first to fourth sidewalls have first to fourth edges, respectively, that are farthest from a top surface of a substrate. The distance between a rear end of the first edge and a rear end of the third edge in a track width direction is greater than the distance between a front end of the first edge and a front end of the third edge in the track width direction. The distance between the second edge and the fourth edge in the track width direction increases with increasing distance from the medium facing surface.