Patents by Inventor Amal Hamdache

Amal Hamdache has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11217626
    Abstract: In one aspect, a dual tunnel magnetoresistance (TMR) element structure includes a first TMR element and a second TMR element. The TMR element structure also includes a conducting layer that is disposed between the first TMR element and the second TMR element and is in direct contact with the first TMR element and the second TMR element.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: January 4, 2022
    Assignee: Allegro MicroSystems, LLC
    Inventors: Paolo Campiglio, Amal Hamdache
  • Publication number: 20210383953
    Abstract: In one aspect, a tunnel magnetoresistance (TMR) element includes a magnesium oxide (MgO) layer, a cobalt iron boron (CoFeB) layer in direct contact with the MgO layer and a cobalt iron (CoFe) layer. The TMR element also includes a tantalum layer in direct contact with the CoFeB layer and the CoFe layer.
    Type: Application
    Filed: August 18, 2021
    Publication date: December 9, 2021
    Applicant: Allegro MicroSystems, LLC
    Inventors: Paolo Campiglio, Amal Hamdache, Julien Voillot
  • Patent number: 11193989
    Abstract: A magnetoresistance assembly can include a substrate and a first GMR element disposed over the substrate, the first GMR element having a bottom surface and top surface. The magnetoresistance assembly can further include a first TMR element disposed over the substrate, the first TMR element having a top surface and a bottom surface, wherein a line perpendicular to and intersecting the top or bottom surface of the first TMR element intersects the first GMR element. The first GMR element and the first TMR element are in electrical communication.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: December 7, 2021
    Assignees: Allegro MicroSystems, LLC, Commissariat à l'énergie atomique et aux énergies alternatives
    Inventors: Paolo Campiglio, Bryan Cadugan, Amal Hamdache, Florian Pallier, Claude Fermon
  • Patent number: 11187764
    Abstract: In one aspect, a bridge includes a first magnetoresistance element that includes a first set of pillars, a second magnetoresistance element that includes a second set of pillars, a third magnetoresistance element that includes a third set of pillars and a fourth magnetoresistance element that includes a fourth set of pillars. The first set of pillars and the fourth set of pillars are disposed in a first matrix and the second set of pillars and the third set of pillars are disposed in a second matrix. The second magnetoresistance element is in series with the first magnetoresistance element, the third magnetoresistance element is in parallel with the first magnetoresistance element and the fourth magnetoresistance element is in series with the third magnetoresistance element.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: November 30, 2021
    Assignee: Allegro MicroSystems, LLC
    Inventors: Rémy Lassalle-Balier, Amal Hamdache, Julien Voillot, Paolo Campiglio
  • Publication number: 20210293911
    Abstract: In one aspect, a bridge includes a first magnetoresistance element that includes a first set of pillars, a second magnetoresistance element that includes a second set of pillars, a third magnetoresistance element that includes a third set of pillars and a fourth magnetoresistance element that includes a fourth set of pillars. The first set of pillars and the fourth set of pillars are disposed in a first matrix and the second set of pillars and the third set of pillars are disposed in a second matrix. The second magnetoresistance element is in series with the first magnetoresistance element, the third magnetoresistance element is in parallel with the first magnetoresistance element and the fourth magnetoresistance element is in series with the third magnetoresistance element.
    Type: Application
    Filed: March 20, 2020
    Publication date: September 23, 2021
    Applicant: Allegro MicroSystems, LLC
    Inventors: Rémy Lassalle-Balier, Amal Hamdache, Julien Voillot, Paolo Campiglio
  • Patent number: 11127518
    Abstract: In one aspect, a tunnel magnetoresistance (TMR) element includes a magnesium oxide (MgO) layer, a cobalt iron boron (CoFeB) layer in direct contact with the MgO layer and a cobalt iron (CoFe) layer. The TMR element also includes a tantalum layer in direct contact with the CoFeB layer and the CoFe layer.
    Type: Grant
    Filed: September 18, 2019
    Date of Patent: September 21, 2021
    Assignee: ALLEGRO MICROSYSTEMS, LLC
    Inventors: Paolo Campiglio, Amal Hamdache, Julien Voillot
  • Publication number: 20210066391
    Abstract: In one aspect, a dual tunnel magnetoresistance (TMR) element structure includes a first TMR element and a second TMR element. The TMR element structure also includes a conducting layer that is disposed between the first TMR element and the second TMR element and is in direct contact with the first TMR element and the second TMR element.
    Type: Application
    Filed: November 15, 2019
    Publication date: March 4, 2021
    Applicant: Allegro MicroSystems, LLC
    Inventors: Paolo Campiglio, Amal Hamdache
  • Publication number: 20210065949
    Abstract: In one aspect, a tunnel magnetoresistance (TMR) element includes a magnesium oxide (MgO) layer, a cobalt iron boron (CoFeB) layer in direct contact with the MgO layer and a cobalt iron (CoFe) layer. The TMR element also includes a tantalum layer in direct contact with the CoFeB layer and the CoFe layer.
    Type: Application
    Filed: September 18, 2019
    Publication date: March 4, 2021
    Applicant: Allegro MicroSystems, LLC
    Inventors: Paolo Campiglio, Amal Hamdache, Julien Voillot
  • Patent number: 10753989
    Abstract: A magnetoresistance structure includes a first magnetoresistance element and a second magnetoresistance element, wherein the first magnetoresistance element is formed on a surface of the second magnetoresistance element. The first magnetoresistance element comprises a free layer, a bias stack configured to bias a magnetic alignment of the free layer to a first direction in the absence of an external magnetic field, and a reference stack having a reference direction substantially orthogonal to the first direction. The magnetoresistance structure may be used to form a two- or three-dimensional magnetic field sensor.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: August 25, 2020
    Assignee: Allegro MicroSystems, LLC
    Inventors: Paolo Campiglio, Amal Hamdache
  • Publication number: 20200064413
    Abstract: A magnetoresistance structure includes a first magnetoresistance element and a second magnetoresistance element, wherein the first magnetoresistance element is formed on a surface of the second magnetoresistance element. The first magnetoresistance element comprises a free layer, a bias stack configured to bias a magnetic alignment of the free layer to a first direction in the absence of an external magnetic field, and a reference stack having a reference direction substantially orthogonal to the first direction. The magnetoresistance structure may be used to form a two- or three-dimensional magnetic field sensor.
    Type: Application
    Filed: August 27, 2018
    Publication date: February 27, 2020
    Applicant: Allegro MicroSystems, LLC
    Inventors: Paolo Campiglio, Amal Hamdache
  • Publication number: 20200033424
    Abstract: A magnetoresistance assembly can include a substrate and a first GMR element disposed over the substrate, the first GMR element having a bottom surface and top surface. The magnetoresistance assembly can further include a first TMR element disposed over the substrate, the first TMR element having a top surface and a bottom surface, wherein a line perpendicular to and intersecting the top or bottom surface of the first TMR element intersects the first GMR element. The first GMR element and the first TMR element are in electrical communication.
    Type: Application
    Filed: July 27, 2018
    Publication date: January 30, 2020
    Applicants: Allegro MicroSystems, LLC, Commissariat à l'énergie atomique et aux énergies alternatives
    Inventors: Paolo Campiglio, Bryan Cadugan, Amal Hamdache, Florian Pallier, Claude Fermon