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公开(公告)号：US20170270954A1
公开(公告)日：2017-09-21
申请号：US15074071
申请日：2016-03-18
申请人： TDK Corporation
IPC分类号： G11B5/39
CPC分类号： G11B5/3912 , G11B5/39 , G11B5/3906 , G11B5/3932
摘要： A magnetic head includes a magneto-resistance effect element in the form of a multilayer film, a pair of shields between which the magneto-resistance effect element is interposed in the lamination direction of the layers of the magneto-resistance effect element and each functioning as an electrode, a pair of side shields with one of said side shields on each side of the magneto-resistance effect element in the direction perpendicular to the lamination direction of the magneto-resistance effect element interposed between the pair of shields, the side shields magnetically coupled to either of the pair of shields, and an anisotropy-application layer disposed adjacent to the shield magnetically coupled to the pair of side shields. The pair of shields, the magneto-resistance effect element, and the pair of side shields are exposed on the air bearing surface facing a recording medium. The anisotropy-application layer is not exposed on the air bearing surface and is provided at a position away from the air bearing surface.
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公开(公告)号：US20230408605A1
公开(公告)日：2023-12-21
申请号：US18240671
申请日：2023-08-31
申请人： TDK CORPORATION
IPC分类号： G01R33/09
CPC分类号： G01R33/093 , G01R33/098
摘要： A magnetic field detection device includes a base, a first yoke, and a magneto-resistive effect element. The first yoke is provided on the base, and includes first and second principal surfaces each extending along a first plane, and a first end surface coupling the first and second principal surfaces. The magneto-resistive effect element is provided on the base, and includes a magnetization free layer disposed at a position overlapped with the first yoke in a first direction along the first plane. The first end surface includes an inverted tapered surface inclined relative to the first plane and extending closer to a center point of the magnetization free layer as being away from the base in a second direction orthogonal to the first plane. A distance from the center point to a first edge is shorter than a distance from the center point to a second edge.
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公开(公告)号：US20210333336A1
公开(公告)日：2021-10-28
申请号：US17366622
申请日：2021-07-02
申请人： TDK CORPORATION
IPC分类号： G01R33/09
摘要： A magnetic field detection device includes a base, a first yoke, and a magneto-resistive effect element. The first yoke is provided on the base, and includes first and second principal surfaces each extending along a first plane, and a first end surface coupling the first and second principal surfaces. The magneto-resistive effect element is provided on the base, and includes a magnetization free layer disposed at a position overlapped with the first yoke in a first direction along the first plane. The first end surface includes an inverted tapered surface inclined relative to the first plane and extending closer to a center point of the magnetization free layer as being away from the base in a second direction orthogonal to the first plane. A distance from the center point to a first edge is shorter than a distance from the center point to a second edge.
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公开(公告)号：US20230092117A1
公开(公告)日：2023-03-23
申请号：US17948789
申请日：2022-09-20
申请人： TDK CORPORATION
发明人： Tetsuya HIRAKI , Kazuya WATANABE
IPC分类号： G01R33/09
摘要： A magnetic sensor 1 includes a plurality of MR elements disposed in first to fourth areas. Each of the first to fourth areas includes a first end edge and a second end edge located at both ends in a first reference direction, and a third end edge and a fourth end edge located at both ends in a second reference direction. Each of the first and second end edges extends along the second reference direction. Each of the third and fourth end edges extends along a third reference direction. Each of the plurality of MR elements has a shape long in a direction different from each of the first reference direction, the second reference direction, and the third reference direction.
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公开(公告)号：US20180261760A1
公开(公告)日：2018-09-13
申请号：US15835628
申请日：2017-12-08
申请人： TDK Corporation
摘要： A magnetic sensor is provided which can improve density of magnetoresistance effect elements without narrowing the wiring pitch. A plurality of element array layers 10 are stacked one on another, each of the element array layers including a plurality of magnetoresistance effect elements 1 arranged in parallel in an in-plane direction, and magnetoresistance effect elements 1 in the plurality of element array layers 10 are connected in series to each other.
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公开(公告)号：US20170256276A1
公开(公告)日：2017-09-07
申请号：US15059383
申请日：2016-03-03
申请人： TDK Corporation
发明人： Tetsuya HIRAKI , Minoru OTA , Hisayoshi WATANABE , Kenzo MAKINO , Hideyuki UKITA
CPC分类号： G11B5/3912 , G11B5/112 , G11B5/3163 , G11B5/3909 , G11B5/3951 , G11B5/3977
摘要： A multi reader head has a plurality of readers that are laminated via a gap layer(s), and each of the readers has a structure in which a current-perpendicular-to-plane (CPP) type of magneto-resistive effect element, where a current flows along the lamination direction, is interposed between a pair of shields that function as an electrode, respectively, from both sides in the lamination direction. The shields that are opposed from each other via the gap layer of the readers that are adjacent in the lamination direction by a distance that is not constant, but include a portion with a greater distance between the shields and another portion with a smaller distance between the shields are included. The portion with a greater distance between the shields is situated at a position away from the center on an air bearing surface opposing to a recording medium in the magneto-resistive effect element.
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公开(公告)号：US20230068352A1
公开(公告)日：2023-03-02
申请号：US17896859
申请日：2022-08-26
申请人： TDK CORPORATION
发明人： Tetsuya HIRAKI , Kenzo MAKINO , Naoki OHTA
IPC分类号： G01R33/09
摘要： A magnetic sensor includes a first path and a second path, a plurality of structures, and a plurality of first electrodes and a plurality of second electrodes. The first path includes at least one first array. The second path includes at least one second array. The at least one first array and the at least one second array are disposed so that they are arranged in a first direction. The at least one first array and the at least one second array each include an odd number of structures disposed so that they are arranged in a second direction.
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公开(公告)号：US20180005648A1
公开(公告)日：2018-01-04
申请号：US15197342
申请日：2016-06-29
申请人： TDK CORPORATION
CPC分类号： G11B5/1272 , G11B5/012 , G11B5/112 , G11B5/1278 , G11B5/3116 , G11B5/315 , G11B5/3163
摘要： This method of manufacturing a perpendicular magnetic recording head includes: forming a water-soluble resin film on a base; forming a first resist pattern having an opening on the water-soluble resin film; selectively dissolving the water-soluble resin film exposed at a bottom of the opening with a developer to expose a part of a surface of the base; forming a non-magnetic oxide film to cover the opening and the exposed part of the surface of the base; forming a second resist pattern to fill the opening covered with the non-magnetic oxide film and then removing the first resist pattern and the non-magnetic oxide film; forming a first side shield and a second side shield on the base to allow them to face each other with the second resist pattern therebetween; and forming a magnetic pole between the first and the second side shields after removal of the second resist pattern.
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公开(公告)号：US20170236538A1
公开(公告)日：2017-08-17
申请号：US15044559
申请日：2016-02-16
申请人： TDK Corporation
发明人： Hisayoshi WATANABE , Naomichi DEGAWA , Satoshi MIURA , Masachika HASHINO , Tetsuya HIRAKI , Hidekazu KOJIMA
IPC分类号： G11B5/39
CPC分类号： G11B5/3912 , G11B2005/3996
摘要： A magneto-resistive effect element (MR element) has an upper shield that is magnetized in a cross track direction, a lower shield that is positioned at an interval relative to the upper shield in a down track direction, and a multilayer film that is positioned between the upper shield and the lower shield and that faces an air bearing surface (ABS). The multilayer film has a free layer where its magnetization direction fluctuates relative to an external magnetic field, a pinned layer where its magnetization direction is pinned against the external magnetic field, a nonmagnetic spacer layer that is positioned between the free layer and the pinned layer, and an insulating layer that is positioned at a back side of the free layer viewed from the ABS. The MR element further has a pair of side shields that are positioned at both sides of the free layer and the insulating layer in a cross track direction. The side shields contact the upper shield on the sides of the free layer and the insulating layer in the cross track direction.
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