公开(公告)号：US20140292314A1

公开(公告)日：2014-10-02

申请号：US14164776

申请日：2014-01-27

Applicant: TDK CORPORATION

Inventor： Homare TOKIDA ,  Satoshi ABE ,  Hiroshi YAMAZAKI ,  Takahiro IMAI

IPC: G01R33/09 ,  G01B7/14

CPC classification number: G01B7/14 ,  G01D5/24461 ,  G01D5/24466 ,  G01D5/2451 ,  G01R33/093

Abstract: A magnetic sensor system includes a scale and a magnetic sensor arranged in a relative positional relationship variable in a first direction, and a computing unit. The magnetic sensor includes a first detection circuit disposed at a first position and a second detection circuit disposed at a second position. Each of the first and second detection circuits includes a spin-valve magnetoresistive element. The difference between the first position and the second position in the first direction is smaller than or equal to 1.25% of a one-pitch amount of change in the relative positional relationship between the scale and the magnetic sensor. The computing unit generates an abnormal-event determination signal indicative of the presence of an abnormal event in the magnetic sensor by computation using detection signals from the first and second detection circuits.

Abstract translation: 磁传感器系统包括在第一方向上以相对位置关系变量布置的刻度尺和磁传感器，以及计算单元。 磁传感器包括设置在第一位置的第一检测电路和设置在第二位置的第二检测电路。 第一和第二检测电路中的每一个包括自旋阀磁阻元件。 第一方向上的第一位置和第二位置之间的差异小于或等于刻度尺与磁性传感器之间的相对位置关系的单音量变化量的1.25％。 计算单元通过使用来自第一和第二检测电路的检测信号的计算，产生表示磁传感器中存在异常事件的异常事件判定信号。

公开(公告)号：US20140292321A1

公开(公告)日：2014-10-02

申请号：US14177602

申请日：2014-02-11

Applicant: TDK CORPORATION

Inventor： Hiroshi YAMAZAKI ,  Yoshiyuki MIZOGUCHI ,  Takahiro IMAI ,  Satoshi ABE ,  Homare TOKIDA

IPC: G01R33/09

CPC classification number: G01R33/093 ,  G01R33/098

Abstract: A magnetic sensor includes an MR element and a pair of magnets. The MR element includes a magnetization pinned layer having a magnetization pinned in a direction parallel to an X direction, a free layer having a magnetization that varies depending on an X-direction component of an external magnetic field, and a nonmagnetic layer interposed between the magnetization pinned layer and the free layer. The magnetization pinned layer, the nonmagnetic layer and the free layer are stacked to be adjacent in a Y direction. The free layer receives an interlayer coupling magnetic field in a direction parallel to the X direction resulting from the magnetization pinned layer. The pair of magnets applies a bias magnetic field to the free layer. The bias magnetic field includes a first component in a direction opposite to that of the interlayer coupling magnetic field and a second component in a Z direction.

Abstract translation: 磁传感器包括MR元件和一对磁体。 MR元件包括具有在与X方向平行的方向上固定的磁化的磁化固定层，具有根据外部磁场的X方向分量而变化的磁化的自由层和介于磁化之间的非磁性层 钉扎层和自由层。 磁化钉扎层，非磁性层和自由层在Y方向上堆叠成相邻。 自由层在由磁化固定层产生的与X方向平行的方向上接收层间耦合磁场。 这对磁体对自由层施加偏置磁场。 偏置磁场包括与层间耦合磁场的方向相反的方向的第一分量和Z方向上的第二分量。

公开(公告)号：US20150198430A1

公开(公告)日：2015-07-16

申请号：US14565563

申请日：2014-12-10

Applicant: TDK CORPORATION

Inventor： Takahiro IMAI ,  Hiraku HIRABAYASHI

IPC: G01B7/30 ,  G01R33/09 ,  G01B7/00

CPC classification number: G01B7/30 ,  G01B7/003 ,  G01D5/147 ,  G01R33/09

Abstract: There is provided a magnetism detection element that has a compact configuration and is excellent in detection sensitivity and detection accuracy of a magnetic field. The magnetism detection element is configured to detect an external magnetic field in +X direction. The magnetism detection element includes: an MR element including a magnetization free layer and a magnetization fixed layer having a synthetic structure, the synthetic structure including a first ferromagnetic layer, a coupling layer, and a second ferromagnetic layer in order from a side close to the magnetization free layer, the first ferromagnetic layer having magnetization in the +X direction, and the second ferromagnetic layer being anti-ferromagnetically coupled with the first ferromagnetic layer through the coupling layer; and bias magnets configured to apply a bias magnetic field to the MR element in −Y direction.

Abstract translation: 提供了具有紧凑结构并且具有优异的检测灵敏度和磁场检测精度的磁检测元件。 磁检测元件被配置为检测+ X方向上的外部磁场。 磁检测元件包括：包括磁化自由层的MR元件和具有合成结构的磁化固定层，所述合成结构包括第一铁磁层，耦合层和第二铁磁层，从靠近 磁化自由层，第一铁磁层在+ X方向上具有磁化，第二铁磁层通过耦合层与第一铁磁层反铁磁耦合; 以及偏置磁体，其构造成在-Y方向上向MR元件施加偏置磁场。

公开(公告)号：US20210343573A1

公开(公告)日：2021-11-04

申请号：US17224480

申请日：2021-04-07

Applicant: TDK CORPORATION

Inventor： Hisayoshi WATANABE ,  Yasuhiro ITO ,  Takahiro IMAI

IPC: H01L21/683 ,  H01L21/673 ,  H01L21/687

Abstract: An electronic component includes a body and one or more protrusions. The body includes a first side surface, a second side surface opposite to the first side surface, and a first principal surface. The one or more protrusions are provided on at least one of the first side surface, the second side surface, or the first principal surface.