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公开(公告)号：US20230089798A1
公开(公告)日：2023-03-23
申请号：US17947654
申请日：2022-09-19
Applicant: TDK CORPORATION
Inventor： Kenkichi ANAGAWA , Shinichirou MOCHIZUKI , Homare TOKIDA
Abstract: A magnetic sensor includes at least one sensor main body; a detection circuit provided on the at least one sensor main body, the detection circuit including a magnetic detection element; and a plurality of sensor terminals provided on the at least one sensor main body. The plurality of sensor terminals include a plurality of signal terminals and a plurality of power supply terminals. The plurality of signal terminals are all disposed on a side of one end of the at least one sensor main body. The plurality of power supply terminals include at least one first terminal disposed on the side of the one end of the at least one sensor main body, and a plurality of second terminals disposed on a side of another end of the at least one sensor main body.
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2.发明申请公开(公告)号：US20160284366A1
公开(公告)日：2016-09-29
申请号：US14667081
申请日：2015-03-24
Applicant: TDK CORPORATION
Inventor： Atsushi YAMAGUCHI , Michitaka NISHIYAMA , Kei HIRATA , Kenkichi ANAGAWA
CPC classification number: G11B5/3116 , G11B5/1278 , G11B5/17 , G11B5/187 , G11B5/23 , G11B5/232 , G11B5/315
Abstract: A magnetic head includes a main pole, a write shield and a gap section. The write shield includes a trailing shield, a leading shield and two side shields. The gap section includes a trailing gap section, a leading gap section and two side gap sections. Each of the two side gap sections and the leading gap section increases in thickness with increasing distance from a medium facing surface. In the medium facing surface, the thickness of the leading gap section is greater than the width of each of the two side gap sections, and the width of each of the two side gap sections decreases with decreasing distance to the leading gap section.
Abstract translation: 磁头包括主极，写屏蔽和间隙部分。 写屏蔽包括后屏蔽，前屏蔽和两个侧屏蔽。 间隙部分包括尾部间隙部分，前部间隙部分和两个侧面间隙部分。 两个侧间隙部分和前导间隙部分中的每一个随着距离介质面向表面的距离增加而增加。 在面向介质的表面中，前导间隙部分的厚度大于两个侧面间隙部分的宽度，并且两个侧面间隙部分的宽度随着与前部间隙部分的距离的减小而减小。
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公开(公告)号：US20160133276A1
公开(公告)日：2016-05-12
申请号：US14539081
申请日：2014-11-12
Applicant: TDK CORPORATION
Inventor： Hideyuki UKITA , Kenkichi ANAGAWA , Kei HIRATA , Atsushi YAMAGUCHI , Ittetsu KITAJIMA
CPC classification number: G11B5/1278 , G11B5/1276 , G11B5/3116 , G11B5/3143 , G11B5/315
Abstract: The perpendicular magnetic recording head includes a magnetic pole including a first region and a second region, the first region having a first specific resistance and an end surface exposed on an air bearing surface, the second region having a second specific resistance higher than the first specific resistance and being located at a position recessed from the air bearing surface.
Abstract translation: 垂直磁记录头包括具有第一区域和第二区域的磁极，第一区域具有第一电阻率和暴露在空气轴承表面上的端面，第二区域具有高于第一特定区域的第二电阻率 并且位于从空气轴承表面凹陷的位置。
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公开(公告)号：US20200116527A1
公开(公告)日：2020-04-16
申请号：US16708574
申请日：2019-12-10
Applicant: TDK CORPORATION
Inventor： Kenkichi ANAGAWA , Shinichirou MOCHIZUKI , Hiraku HIRABAYASHI , Kazuya WATANABE
Abstract: An angle sensor includes a plurality of composite magnetic field information generation units and an angle computing unit. The plurality of composite magnetic field information generation units detect, at a plurality of detection positions, a composite magnetic field of a magnetic field to be detected and a noise magnetic field other than the magnetic field to be detected, and thereby generate a plurality of pieces of composite magnetic field information including information on the direction of the composite magnetic field. The angle computing unit generates a detected angle value by performing an operation using the plurality of pieces of composite magnetic field information so that an error of the detected angle value caused by the noise magnetic field is made smaller than in the case where the detected angle value is generated on the basis of any and only one of the plurality of pieces of composite magnetic field information.
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5.发明申请公开(公告)号：US20140160597A1
公开(公告)日：2014-06-12
申请号：US13708507
申请日：2012-12-07
Applicant: TDK CORPORATION
Inventor： Norikazu OTA , Masahiro SAITO , Taro OIKE , Takeo KAGAMI , Yosuke ANTOKU , Kenkichi ANAGAWA , Kenta HARA , Tetsuro SASAKI , Shingo MIYATA , Katsuki KURIHARA
IPC: G11B5/11
CPC classification number: G11B5/1278 , G11B5/3116 , G11B5/315
Abstract: A magnetic head includes a main pole, a write shield, and a return path section. The write shield includes first and second shield portions located on opposite sides of the main pole in the track width direction. The return path section includes first and second yoke portions located on opposite sides of the main pole in the track width direction. The first yoke portion is connected to the first shield portion. The second yoke portion is connected to the second shield portion. A coil surrounds at least part of the entire outer periphery of the main pole when viewed from a medium facing surface.
Abstract translation: 磁头包括主极，写屏蔽和返回路径部分。 写屏蔽包括位于主磁极在磁道宽度方向的相对侧上的第一和第二屏蔽部分。 返回路径部分包括在轨道宽度方向上位于主极的相对侧上的第一和第二轭部分。 第一磁轭部分连接到第一屏蔽部分。 第二磁轭部分连接到第二屏蔽部分。 当从面向介质的表面观察时，线圈围绕主极的整个外周的至少一部分。
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Patent Agency Ranking
公开(公告)号：US20220128637A1
公开(公告)日：2022-04-28
申请号：US17498165
申请日：2021-10-11
Applicant: TDK Corporation
Inventor： Naoki OHTA , Hiroshi YAMAZAKI , Satoshi MIURA , Kenkichi ANAGAWA , Yosuke KOMASAKI
Abstract: A magnetic sensor comprising a resin layer having a first surface and a second surface, which is opposite to the first surface and a magnetoresistive effect unit that detects a magnetic field in a predetermined direction, wherein the magnetoresistive effect unit includes at least a first magnetoresistive effect unit that detects a magnetic field in a first direction, the first direction is a direction orthogonal to the first surface of the resin layer, an inclined surface that is inclined at a predetermined angle with respect to the first surface is formed in the first surface of the resin layer, and the first magnetoresistive effect unit is formed in the inclined surface.
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公开(公告)号：US20180274896A1
公开(公告)日：2018-09-27
申请号：US15875166
申请日：2018-01-19
Applicant: TDK CORPORATION
Inventor： Kenkichi ANAGAWA , Shinichirou MOCHIZUKI
CPC classification number: G01B7/30 , G01D3/02 , G01D5/145 , G01D5/16 , G01D5/24476 , G01R33/09 , G01R33/093
Abstract: An angle sensor includes detection units and an angle computation unit. The detection units detect a composite magnetic field of a magnetic field to be detected and a noise magnetic field. Each detection unit generates a first detection signal representing the strength of a component in a first direction of the composite magnetic field, and a second detection signal representing the strength of a component in a second direction of the composite magnetic field. The angle computation unit generates a detected angle value by performing computations using a plurality of pairs of first and second detection signals generated at the detection units wherein an error of the detected angle value resulting from the noise magnetic field is made smaller than in the case of generating the detected angle value on the basis of only a pair of first and second detection signals generated at any one of the detection units.
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公开(公告)号：US20180164127A1
公开(公告)日：2018-06-14
申请号：US15805666
申请日：2017-11-07
Applicant: TDK CORPORATION
Inventor： Kenkichi ANAGAWA , Shinichirou MOCHIZUKI , Hiraku HIRABAYASHI , Kazuya WATANABE
IPC: G01D5/12
Abstract: An angle sensor includes a plurality of composite magnetic field information generation units and an angle computing unit. The plurality of composite magnetic field information generation units detect, at a plurality of detection positions, a composite magnetic field of a magnetic field to be detected and a noise magnetic field other than the magnetic field to be detected, and thereby generate a plurality of pieces of composite magnetic field information including information on at least the direction, out of the direction and the strength, of the composite magnetic field. At each of the plurality of detection positions, the magnetic field to be detected varies in direction according to an angle to be detected. The angle computing unit generates a detected angle value using the method of least squares on the basis of the plurality of pieces of composite magnetic field information.
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公开(公告)号：US20180087927A1
公开(公告)日：2018-03-29
申请号：US15705700
申请日：2017-09-15
Applicant: TDK CORPORATION
Inventor： Kenkichi ANAGAWA , Shinichirou MOCHIZUKI , Hiraku HIRABAYASHI , Kazuya WATANABE
IPC: G01D5/16
Abstract: An angle sensor includes a plurality of composite magnetic field information generation units and an angle computing unit. The plurality of composite magnetic field information generation units detect, at a plurality of detection positions, a composite magnetic field of a magnetic field to be detected and a noise magnetic field other than the magnetic field to be detected, and thereby generate a plurality of pieces of composite magnetic field information including information on the direction of the composite magnetic field. The angle computing unit generates a detected angle value by performing an operation using the plurality of pieces of composite magnetic field information so that an error of the detected angle value caused by the noise magnetic field is made smaller than in the case where the detected angle value is generated on the basis of any and only one of the plurality of pieces of composite magnetic field information.
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公开(公告)号：US20140177104A1
公开(公告)日：2014-06-26
申请号：US13727341
申请日：2012-12-26
Applicant: TDK CORPORATION
Inventor： Hideyuki UKITA , Kenta HARA , Kenkichi ANAGAWA , Yosuke ANTOKU , Masashi SANO , Shuji OKAME , Masaya KATO
IPC: G11B5/39
CPC classification number: G11B5/1278 , G11B5/235 , G11B5/3116 , G11B5/315
Abstract: A trailing shield is provided on a trailing side of a magnetic pole with a non-magnetic gap layer in between, and an intermediate layer having negative uniaxial magnetocrystalline anisotropy is provided between the non-magnetic gap layer and the trailing shield. The intermediate layer has a magnetic property in which an easy axis of magnetization is provided in an in-plane direction and thus magnetization is likely to occur in that direction, whereas a difficult axis of magnetization is provided in a direction intersecting the in-plane direction and thus magnetization is less likely to occur in that direction. Accordingly, magnetic flux becomes difficult to excessively flow from the magnetic pole into the trailing shield.
Abstract translation: 尾部屏蔽设置在磁极的后侧，其间具有非磁隙层，并且在非磁隙层和后屏蔽之间设置具有负单轴结晶各向异性的中间层。 中间层具有磁特性，其中容易的磁化轴在面内方向上提供，因此可能在该方向上发生磁化，而在与面内方向交叉的方向上提供难度的磁化轴 因此磁化不太可能在该方向上发生。 因此，磁通变得难以从磁极过渡到后挡板。
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