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    Magnetic field sensor integrated circuit with an integrated coil
    42.
    发明授权
    Magnetic field sensor integrated circuit with an integrated coil 有权

    公开(公告)号：US10916665B2

    公开(公告)日：2021-02-09

    申请号：US16252789

    申请日：2019-01-21

    Applicant: Allegro MicroSystems, LLC

    Inventor： Ravi Vig ,  William P. Taylor ,  Paul A. David ,  P. Karl Scheller ,  Andreas P. Friedrich

    IPC: H01L29/82 ,  G01R33/06 ,  G01R33/00 ,  G01D5/14 ,  G01R15/20

    Abstract: A magnetic field sensor includes a lead frame, a semiconductor die having a first surface in which a magnetic field sensing element is disposed and a second surface attached to the lead frame, and a non-conductive mold material enclosing the die and at least a portion of the lead frame. The sensor may include a ferromagnetic mold material secured to a portion of the non-conductive mold material. Features include a multi-sloped taper to an inner surface of a non-contiguous central region of the ferromagnetic mold material, a separately formed element disposed in the non-contiguous central region, one or more slots in the lead frame, a molded ferromagnetic suppression device spaced from the non-conductive mold material and enclosing a portion of a lead, a passive device spaced from the non-conductive mold material and coupled to a plurality of leads, and a ferromagnetic bead coupled to a lead. Also described is a coil secured to the non-conductive mold material and a lead having at least two separated portions with a passive component coupled across the two portions.

    Arrangements for magnetic field sensors that act as tooth detectors
    44.
    发明授权
    Arrangements for magnetic field sensors that act as tooth detectors 有权

    公开(公告)号：US10254103B2

    公开(公告)日：2019-04-09

    申请号：US15655135

    申请日：2017-07-20

    Applicant: Allegro MicroSystems, LLC

    Inventor： William P. Taylor ,  P. Karl Scheller ,  Paul A. David

    IPC: G01B7/14 ,  G01R33/07 ,  G01R33/06 ,  G01R33/09 ,  G01R5/14 ,  G01D5/14

    Abstract: A magnetic field sensor for sensing motion of a ferromagnetic object comprises a substrate. The substrate includes first and second major surfaces, each having a width dimension and a length dimension. The magnetic field sensor further comprises a magnet. The magnet includes a first major surface proximate to the substrate, the first major surface of the magnet heaving a width and a length, and a second major surface. The magnetic field sensor further includes first and second magnetic field sensing dements. The first magnetic field sensing element and the second magnetic field sensing element are positioned beyond respective ends of the width of the magnet. The second magnetic field sensing element is substantially farther from the ferromagnetic object than the first magnetic field sensing element. A line passing through the first and second magnetic field sensing elements is perpendicular to the magnet axis.

    Magnetic Field Sensor Integrated Circuit with Integral Ferromagnetic Material
    50.
    发明申请
    Magnetic Field Sensor Integrated Circuit with Integral Ferromagnetic Material 有权
    具有积分铁磁材料的磁场传感器集成电路

    公开(公告)号：US20130249029A1

    公开(公告)日：2013-09-26

    申请号：US13748999

    申请日：2013-01-24

    Applicant: ALLEGRO MICROSYSTEMS, LLC

    Inventor： Ravi Vig ,  William P. Taylor ,  Paul David ,  P. Karl Scheller ,  Andreas P. Friedrich

    IPC: H01L29/82

    CPC classification number: H01L29/82 ,  G01R33/0047 ,  G01R33/0052 ,  G01R33/06 ,  H01L2224/45147 ,  H01L2224/48247 ,  H01L2924/00011 ,  H01L2924/00 ,  H01L2924/01033

    Abstract: A magnetic field sensor includes a lead frame, a semiconductor die having a first surface in which a magnetic field sensing element is disposed and a second surface attached to the lead frame, and a non-conductive mold material enclosing the die and at least a portion of the lead frame. The sensor may include a ferromagnetic mold material secured to a portion of the non-conductive mold material. Features include a multi-sloped taper to an inner surface of a non-contiguous central region of the ferromagnetic mold material, a separately formed element disposed in the non-contiguous central region, one or more slots in the lead frame, a molded ferromagnetic suppression device spaced from the non-conductive mold material and enclosing a portion of a lead, a passive device spaced from the non-conductive mold material and coupled to a plurality of leads, and a ferromagnetic bead coupled to a lead. Also described is a coil secured to the non-conductive mold material and a lead having at least two separated portions with a passive component coupled across the two portions.

    Abstract translation: 磁场传感器包括引线框架，具有其中设置有磁场感测元件的第一表面和附接到引线框架的第二表面的半导体管芯以及封装管芯的非导电模具材料和至少一部分 的引线框架。 传感器可以包括固定到非导电模具材料的一部分的铁磁模具材料。 特征包括到铁磁模具材料的不连续中心区域的内表面的多倾斜锥形，设置在不连续中心区域中的单独形成的元件，引线框架中的一个或多个槽，模制铁磁抑制 与非导电模具材料间隔开并且包围引线的一部分，与非导电模具材料间隔开并耦合到多个引线的无源器件以及耦合到引线的铁磁珠。 还描述了固定到非导电模具材料的线圈和具有至少两个分离部分的引线，其中被动元件跨越两个部分耦合。

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