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1. 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.

2. 发明授权

US10748559B1 Magnetic head including spin torque oscillator and manufacturing method for the same 有权
公开(公告)号：US10748559B1
公开(公告)日：2020-08-18
申请号：US16801399
申请日：2020-02-26
申请人： Hironori Araki , Yoshitaka Sasaki , Hiroyuki Ito , Yoji Nomura , Shigeki Tanemura , Kazuki Sato , Tetsuya Roppongi , Atsushi Yamaguchi
发明人： Hironori Araki , Yoshitaka Sasaki , Hiroyuki Ito , Yoji Nomura , Shigeki Tanemura , Kazuki Sato , Tetsuya Roppongi , Atsushi Yamaguchi
IPC分类号： G11B5/127 , G11B5/31 , G11B5/02 , G11B5/235
摘要： A magnetic head includes a main pole, a trailing shield, a spin torque oscillator, and a buffer layer. The buffer layer is interposed between the main pole and the spin torque oscillator. The spin torque oscillator has first and second side surfaces. The first and second side surfaces respectively form first and second angles with respect to a direction perpendicular to a top surface of a substrate. The first and second angles each fall within a range of 0° to 10°. The buffer layer has third and fourth side surfaces. The third side surface includes a first inclined portion forming a third angle greater than the first angle. The fourth side surface includes a second inclined portion forming a fourth angle greater than the second angle.

3. 发明授权

US10839829B1 Magnetic head with a main pole including first and second layers and manufacturing method for the same 有权
公开(公告)号：US10839829B1
公开(公告)日：2020-11-17
申请号：US16585640
申请日：2019-09-27
申请人： Yoshitaka Sasaki , Hiroyuki Ito , Kazuki Sato , Shigeki Tanemura , Tetsuya Roppongi , Kei Hirata , Atsushi Yamaguchi , Michitaka Nishiyama
发明人： Yoshitaka Sasaki , Hiroyuki Ito , Kazuki Sato , Shigeki Tanemura , Tetsuya Roppongi , Kei Hirata , Atsushi Yamaguchi , Michitaka Nishiyama
IPC分类号： G11B5/127 , G11B5/31 , G11B5/66 , G11B5/39 , G11B5/265
CPC分类号： G11B5/3123 , G11B5/1278 , G11B5/265 , G11B5/3912 , G11B5/66
摘要： A magnetic head includes a medium facing surface, a coil, a main pole, and a substrate. The main pole includes a first layer, and a second layer lying on the first layer. The first layer includes a thickness-changing portion whose dimension in a direction perpendicular to a top surface of the substrate decreases with decreasing distance to the medium facing surface. At least part of the second layer is located on the thickness-changing portion.

4. 发明授权

US10586558B1 Magnetic head including a main pole and a write shield 有权
公开(公告)号：US10586558B1
公开(公告)日：2020-03-10
申请号：US16267803
申请日：2019-02-05
申请人： Yoshitaka Sasaki , Hiroyuki Ito , Kazuki Sato , Shigeki Tanemura , Hironori Araki , Atsushi Yamaguchi , Kei Hirata
发明人： Yoshitaka Sasaki , Hiroyuki Ito , Kazuki Sato , Shigeki Tanemura , Hironori Araki , Atsushi Yamaguchi , Kei Hirata
IPC分类号： G11B5/31 , G11B5/11 , G11B5/127 , G11B5/02
摘要： A magnetic head includes a main pole and a write shield. The write shield includes a bottom shield, a first side shield and a second side shield. The first side shield has first and second sidewalls. The second side shield has third and fourth sidewalls. Each of the second and fourth sidewalls has a top edge farthest from a top surface of a substrate. The top edge of each of the second and fourth sidewalls is parallel to a medium facing surface. A portion of a top surface of the bottom shield, the first sidewall, and the third sidewall define a receiving section to receive a portion of the main pole. The receiving section has a bottom including a first inclined portion, a second inclined portion, and a third inclined portion.

5. 发明授权

US10297277B1 Magnetic head including a coil and a magnetic path forming section 有权
公开(公告)号：US10297277B1
公开(公告)日：2019-05-21
申请号：US16123225
申请日：2018-09-06
申请人： Yoshitaka Sasaki , Hiroyuki Ito , Kazuki Sato , Shigeki Tanemura , Atsushi Yamaguchi , Kei Hirata
发明人： Yoshitaka Sasaki , Hiroyuki Ito , Kazuki Sato , Shigeki Tanemura , Atsushi Yamaguchi , Kei Hirata
IPC分类号： G11B5/127 , G11B5/31
摘要： A magnetic head includes a coil, and a magnetic path forming section for defining a first space for a portion of the coil to pass through. The magnetic path forming section includes a core section. The coil includes a first winding portion and a second winding portion connected in series. The first winding portion includes one or two first coil elements extending to pass through the first space, and extends once or twice around the entire perimeter of the core section. The second winding portion does not pass through the first space, and extends less than once around the entire perimeter of the core section to rotate n degrees about a center point of the core section, where n is greater than 270 and smaller than 360.

6. 发明授权

US07463449B2 Magnetic head for perpendicular magnetic recording, head gimbal assembly, head arm assembly and magnetic disk drive 有权
标题翻译：用于垂直磁记录的磁头，磁头万向架组件，磁头臂组件和磁盘驱动器
公开(公告)号：US07463449B2
公开(公告)日：2008-12-09
申请号：US11266289
申请日：2005-11-04
申请人： Kei Hirata , Atsushi Yamaguchi , Tetsuya Roppongi , Kiyoshi Noguchi
发明人： Kei Hirata , Atsushi Yamaguchi , Tetsuya Roppongi , Kiyoshi Noguchi
IPC分类号： G11B5/31 , G11B5/127
CPC分类号： G11B5/1278 , G11B5/3113 , G11B5/3116
摘要： A pole layer incorporate a track width defining and a wide portion. A material forming the pole layer is an alloy whose major elements are iron and nickel. In the alloy, where the proportions of iron and nickel with respect to the total of iron and nickel are indicated as (100−M) weight % and M weight %, respectively, M is greater than 0 and smaller than or equal to 10. The internal stress of the pole layer is a tensile stress. The magnetostriction constant of the material forming the pole layer is positive. Where the anisotropy field of the pole layer is Hk (A/m), the magnetostriction constant of the material forming the pole layer is λ(×10−6), and the internal stress of the pole layer is σ (MPa), the value of Hk/(λ×σ) is greater than 0.01 and smaller than 0.2.
摘要翻译：极层包含限定的轨道宽度和宽的部分。形成极层的材料是其主要元素是铁和镍的合金。在合金中，铁和镍相对于铁和镍总量的比例分别表示为（100-M）重量％和M重量％，M大于0且小于或等于10。极层的内应力是拉伸应力。形成极层的材料的磁致伸缩常数为正。在极层的各向异性场为Hk（A / m）的情况下，形成极层的材料的磁致伸缩常数为λ（x10-6），极层的内应力为σ（MPa）的Hk /（lambdaxsigma）大于0.01且小于0.2。

7. 发明授权

US07312951B2 Magnetic head for perpendicular magnetic recording 有权
标题翻译：用于垂直磁记录的磁头
公开(公告)号：US07312951B2
公开(公告)日：2007-12-25
申请号：US11038390
申请日：2005-01-21
申请人： Kei Hirata , Kiyoshi Noguchi , Tetsuya Roppongi , Atsushi Yamaguchi
发明人： Kei Hirata , Kiyoshi Noguchi , Tetsuya Roppongi , Atsushi Yamaguchi
IPC分类号： G11B5/127 , G11B5/147 , G11B5/133 , G11B5/33
CPC分类号： G11B5/1278 , Y10T428/115 , Y10T428/1186
摘要： The invention provides a magnetic head for perpendicular magnetic recording having an air bearing surface positioned facing the recording surface of a recording medium, which records magnetic information on the recording medium by generating magnetic flux toward the recording surface of the recording medium, and comprises a magnetic pole which generates magnetic flux toward the recording surface of the recording medium and a return yoke having one end connected to the magnetic pole and the other end positioned facing the recording surface of the recording medium, wherein the material composing the magnetic pole has a magnetostriction constant λ of at least 0 and less than 10×10−6, with a parameter P represented by the formula: P=Hk/(λ×σ) (where Hk represents the magnetic anisotropic field (A/m), σ represents the stress (MPa) and λ represents the magnetostriction constant) of larger than 0.1 and less than 200.
摘要翻译：本发明提供了一种用于垂直磁记录的磁头，其具有面向记录介质的记录表面的空气轴承表面，其通过向记录介质的记录表面产生磁通量而将磁信息记录在记录介质上，并且包括磁向记录介质的记录表面产生磁通的磁极和一个与磁极相连的一端的返回磁轭和面对记录介质的记录表面的另一端，其中构成磁极的材料具有磁致伸缩常数 λ至少为0且小于10×10 -6，具有由以下公式表示的参数P：P = Hk /（lambdaxsigma）（其中Hk表示磁各向异性场（A / m），σ 表示应力（MPa），λ表示磁致伸缩常数）大于0.1且小于200。

8. 发明申请

US20060098335A1 Magnetic head for perpendicular magnetic recording, head gimbal assembly, head arm assembly and magnetic disk drive 有权
标题翻译：用于垂直磁记录的磁头，磁头万向架组件，磁头臂组件和磁盘驱动器
公开(公告)号：US20060098335A1
公开(公告)日：2006-05-11
申请号：US11266289
申请日：2005-11-04
申请人： Kei Hirata , Atsushi Yamaguchi , Tetsuya Roppongi , Kiyoshi Noguchi
发明人： Kei Hirata , Atsushi Yamaguchi , Tetsuya Roppongi , Kiyoshi Noguchi
IPC分类号： G11B5/127
CPC分类号： G11B5/1278 , G11B5/3113 , G11B5/3116
摘要： A pole layer incorporate a track width defining and a wide portion. A material forming the pole layer is an alloy whose major elements are iron and nickel. In the alloy, where the proportions of iron and nickel with respect to the total of iron and nickel are indicated as (100-M) weight % and M weight %, respectively, M is greater than 0 and smaller than or equal to 10. The internal stress of the pole layer is a tensile stress. The magnetostriction constant of the material forming the pole layer is positive. Where the anisotropy field of the pole layer is Hk (A/m), the magnetostriction constant of the material forming the pole layer is λ(×10−6), and the internal stress of the pole layer is σ (MPa), the value of Hk/(λ×σ) is greater than 0.01 and smaller than 0.2.
摘要翻译：极层包含限定的轨道宽度和宽的部分。形成极层的材料是其主要元素是铁和镍的合金。在合金中，铁和镍相对于铁和镍总量的比例分别表示为（100-M）重量％和M重量％，M大于0且小于或等于10。极层的内应力是拉伸应力。形成极层的材料的磁致伸缩常数为正。在极层的各向异性场为Hk（A / m）的情况下，形成极层的材料的磁致伸缩常数为λ（×10 -6 -6），极层的内应力为 sigma（MPa），Hk /（lambdaxsigma）的值大于0.01且小于0.2。

9. 发明申请

US20050286170A1 Magnetic head for perpendicular magnetic recording 有权
标题翻译：用于垂直磁记录的磁头
公开(公告)号：US20050286170A1
公开(公告)日：2005-12-29
申请号：US11038390
申请日：2005-01-21
申请人： Kei Hirata , Kiyoshi Noguchi , Tetsuya Roppongi , Atsushi Yamaguchi
发明人： Kei Hirata , Kiyoshi Noguchi , Tetsuya Roppongi , Atsushi Yamaguchi
IPC分类号： G11B5/127
CPC分类号： G11B5/1278 , Y10T428/115 , Y10T428/1186
摘要： The invention provides a magnetic head for perpendicular magnetic recording having an air bearing surface positioned facing the recording surface of a recording medium, which records magnetic information on the recording medium by generating magnetic flux toward the recording surface of the recording medium, and comprises a magnetic pole which generates magnetic flux toward the recording surface of the recording medium and a return yoke having one end connected to the magnetic pole and the other end positioned facing the recording surface of the recording medium, wherein the material composing the magnetic pole has a magnetostriction constant λ of at least 0 and less than 10×10−6, with a parameter P represented by the formula: P=Hk/(λ×σ) (where Hk represents the magnetic anisotropic field (A/m), σ represents the stress (MPa) and λ represents the magnetostriction constant) of larger than 0.1 and less than 200.
摘要翻译：本发明提供了一种用于垂直磁记录的磁头，其具有面向记录介质的记录表面的空气轴承表面，其通过向记录介质的记录表面产生磁通量而将磁信息记录在记录介质上，并且包括磁向记录介质的记录表面产生磁通的磁极和一个与磁极相连的一端的返回磁轭和面对记录介质的记录表面的另一端，其中构成磁极的材料具有磁致伸缩常数 λ至少为0且小于10×10 -6，具有由以下公式表示的参数P：P = Hk /（lambdaxsigma）（其中Hk表示磁各向异性场（A / m），σ 表示应力（MPa），λ表示磁致伸缩常数）大于0.1且小于200。

10. 发明授权

US08929761B2 Image forming method and apparatus having induction heat fixing device with temperature sensing of switching element 有权
标题翻译：具有感应热定影装置的图像形成方法和装置，具有开关元件的温度感测
公开(公告)号：US08929761B2
公开(公告)日：2015-01-06
申请号：US13448667
申请日：2012-04-17
申请人： Hitoshi Wakide , Atsushi Yamaguchi
发明人： Hitoshi Wakide , Atsushi Yamaguchi
IPC分类号： G03G15/20 , H05B6/06
CPC分类号： G03G15/205 , G03G2215/00721
摘要： An image forming apparatus uses a switching element to switch current flowing to an excitation coil, so that a heating layer in a fixing member produces heat that fixes an image to a transported sheet. Based on a change in temperature of the switching element over time, a prediction unit determines, at a predetermined first time point, a predicted temperature of the switching element at a second time point at which a tip of the sheet is scheduled to arrive at the fixing member. When the predicted temperature is at least a predetermined value, a control unit controls power supplied to the excitation coil by restricting switching of the switching element and lifting the restriction, so that by the second time point the detected temperature of the fixing member reaches a temperature necessary for fixing.
摘要翻译：图像形成装置使用开关元件来切换流向励磁线圈的电流，使得固定构件中的加热层产生将图像固定到传送的片材上的热量。基于开关元件的温度随时间的变化，预测单元在预定的第一时间点确定在片材的末端到达第二时间点的开关元件的预测温度固定件。当预测温度至少为预定值时，控制单元通过限制开关元件的切换和提升限制来控制提供给励磁线圈的电力，使得在第二时间点，固定构件的检测温度达到温度固定必要

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