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公开(公告)号：US10607925B2
公开(公告)日：2020-03-31
申请号：US15727126
申请日：2017-10-06
Applicant: Allegro MicroSystems, LLC
Inventor： Paul A. David , William P. Taylor
IPC: H01L23/495 , H01L21/48 , H01L23/31 , H01L23/00 , H01L43/02 , G01R33/02 , G01R33/00 , G01R33/07 , G01R33/09
Abstract: An integrated circuit package includes a lead frame having a first surface, a second opposing surface, at least one die attach portion configured to support at least one die, and a plurality of leads, wherein at least one of the leads has a raised feature extending along a portion of a length of the lead.
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公开(公告)号：US20170278981A1
公开(公告)日：2017-09-28
申请号：US15618251
申请日：2017-06-09
Applicant: Allegro MicroSystems, LLC
Inventor： Ravi Vig , William P. Taylor , Paul A. David , P. Karl Scheller , Andreas P. Friedrich
CPC classification number: H01L29/82 , G01D5/147 , 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.
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公开(公告)号：US20160209239A1
公开(公告)日：2016-07-21
申请号：US15080966
申请日：2016-03-25
Applicant: Allegro MicroSystems, LLC
Inventor： Jeffrey Eagen , Paul A. David
CPC classification number: G01D5/16 , G01D5/147 , G01R15/205 , G01R33/0082 , G01R33/091 , G11B5/3958 , H01F1/055
Abstract: In an embodiment, a magnetic field sensor comprises a substrate and a first magnetoresistive element supported by the substrate. The magnetic field sensor also includes a second magnetoresistive element supported by the substrate and coupled in series with the first magnetoresistive element to form a voltage node between the first and second magnetoresistive elements, and at which an output voltage is provided that changes in response to an external magnetic field. The magnetic field sensor also includes a magnetic source that produces a local magnetic field having a strength sufficient to bias the first magnetoresistive element to a resistive value that is substantially resistant to changing in response to the external magnetic field. In embodiments, additional magnetoresistive elements are included to form an H-bridge circuit.
Abstract translation: 在一个实施例中，磁场传感器包括衬底和由衬底支撑的第一磁阻元件。 磁场传感器还包括由衬底支撑并与第一磁阻元件串联耦合的第二磁阻元件，以在第一和第二磁阻元件之间形成电压节点，并且提供输出电压，其响应于 外部磁场。 磁场传感器还包括产生具有足以将第一磁阻元件偏置到基本上抵抗外部磁场变化的电阻值的强度的局部磁场的磁源。 在实施例中，包括附加的磁阻元件以形成H桥电路。
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公开(公告)号：US20160123771A1
公开(公告)日：2016-05-05
申请号：US14529669
申请日：2014-10-31
Applicant: Allegro MicroSystems, LLC
Inventor： Paul A. David , William P. Taylor
CPC classification number: G01D5/145 , G01D5/147 , G01D5/2013
Abstract: A magnetic field sensor has a plurality of magnetic field sensing elements and operates as a motion detector for sensing a rotation or other movement of a target object.
Abstract translation: 磁场传感器具有多个磁场感测元件，并且作为用于感测目标物体的旋转或其它运动的运动检测器而操作。
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公开(公告)号：US20150345990A1
公开(公告)日：2015-12-03
申请号：US14287469
申请日：2014-05-27
Applicant: Allegro Microsystems, LLC
Inventor： Paul A. David , Ryan Metivier
CPC classification number: H01F7/06 , G01D5/145 , G01D5/24438 , H01F7/0278
Abstract: A magnet includes a magnetic body having a length and width. The body has a first notch in one side and extending along at least a portion of the length of the body, and a second notch in an opposite side of the body extending along at least a portion of the length of the body. A magnetic field produced by the body has a substantially uniform magnetic flux along at least a portion of the length of the body. A system for detecting a target includes one or more magnetic field sensing elements positioned within the portion of the magnetic field having substantially uniform flux.
Abstract translation: 磁体包括具有长度和宽度的磁体。 主体在一侧具有第一凹口并且沿着主体的长度的至少一部分延伸，并且在主体的相对侧的第二凹口沿主体的至少一部分长度延伸。 由身体产生的磁场沿着身体长度的至少一部分具有基本均匀的磁通量。 用于检测目标的系统包括位于具有基本上均匀通量的磁场部分内的一个或多个磁场感测元件。
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Patent Agency Ranking
公开(公告)号：US08885302B1
公开(公告)日：2014-11-11
申请号：US14042982
申请日：2013-10-01
Applicant: Allegro Microsystems, LLC
Inventor： Paul A. David , William P. Taylor , Bryan Cadugan
IPC: G11B5/33
CPC classification number: G01R33/0052 , G01R33/096 , H01L43/12
Abstract: Novel anisotropic magneto-resistive (AMR) sensor architectures and techniques for fabricating same are described. In some embodiments, AMR sensors having barber pole structures disposed below corresponding AMR sensing elements are provided. AMR sensors having segmented AMR sensing elements are also described. Fabrication techniques that can be used to fabricate such sensors are also described. Fabrication techniques are also described that can reduce the risk of contamination during AMR sensor fabrication.
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17.发明申请公开(公告)号：US20140084904A1
公开(公告)日：2014-03-27
申请号：US14093815
申请日：2013-12-02
Applicant: Allegro Microsystems, LLC
Inventor： Ravi Vig , P. Karl Scheller , Paul A. David
IPC: G01P3/44
CPC classification number: G01P3/44 , G01D5/142 , G01P3/488 , G01P3/489 , G01P13/045 , G01R33/0041 , G01R33/07
Abstract: An apparatus and a method provide an output signal indicative of a speed of rotation and a direction of rotation of a ferromagnetic object capable of rotating. A variety of signal formats of the output signal are described.
Abstract translation: 装置和方法提供表示能够旋转的铁磁体的旋转速度和旋转方向的输出信号。 描述了输出信号的各种信号格式。
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18.发明授权公开(公告)号：US11677032B2
公开(公告)日：2023-06-13
申请号：US17806758
申请日：2022-06-14
Applicant: Allegro MicroSystems, LLC
Inventor： Ravi Vig , William P. Taylor , Paul A. David , P. Karl Scheller , Andreas P. Friedrich
CPC classification number: H01L29/82 , G01D5/147 , G01R33/0047 , G01R33/0052 , G01R33/06 , G01R15/207 , H01L2224/45147 , H01L2224/48247 , H01L2924/00011 , H01L2224/45147 , H01L2924/00 , H01L2924/00011 , H01L2924/01033
Abstract: A sensor includes a lead frame having a first surface, a second opposing surface, and a plurality of leads and a semiconductor die having a first surface attached to the first surface of the lead frame and a second, opposing surface. The sensor further includes a non-conductive mold material enclosing the die and at least a portion of the lead frame, a conductive coil secured to the non-conductive mold material, a mold material secured to the non-conductive mold material and enclosing the conductive coil, wherein the mold material has a central region and an element disposed in the central region of the mold material.
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公开(公告)号：US20230110671A1
公开(公告)日：2023-04-13
申请号：US17495879
申请日：2021-10-07
Applicant: Allegro MicroSystems, LLC
Inventor： Shixi Louis Liu , Paul A. David , Natasha Healey
IPC: G01R19/00 , H01L23/495 , G01R15/20
Abstract: A current sensor integrated circuit configured to sense a current through a current conductor includes a lead frame at least one signal lead, a fan out wafer level package (FOWLP), and a mold material enclosing the FOWLP and a portion of the lead frame. The FOWLP includes a semiconductor die configured to support at least one magnetic field sensing element to sense a magnetic field associated with the current, wherein the semiconductor die has a first surface on which at least one connection pad is accessible, a redistribution layer in contact with the at least one connection pad, and an insulating layer in contact with the redistribution layer, wherein the insulating layer is configured to extend beyond a periphery of the semiconductor die by a minimum distance. The die connection pad is configured to be electrically coupled to the at least one signal lead.
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公开(公告)号：US11255700B2
公开(公告)日：2022-02-22
申请号：US16527313
申请日：2019-07-31
Applicant: Allegro MicroSystems, LLC
Inventor： Rémy Lassalle-Balier , Jeffrey Eagen , Damien Dehu , Paul A. David , Andrea Foletto , Maxime Rioult
Abstract: Methods and apparatus for a magnetic field sensor for measuring movement of a target including a substrate and a magnet. A first bridge structure has first and second pluralities of magnetic field sensing elements spaced from each other. An axis of sensitivity of the magnetic field sensing elements is rotated at a predetermined angle with respect to an axis of rotation of the target to generate an output signal corresponding to the position of the target and a change in a property of the magnetic field generated by the magnet.
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