Integrated magnetic structure
AssigneeMelexis Technologies SA
InventorJavier Bilbao De Mendizabal
Life of this patent
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Abstract
A magnetic field sensor is described comprising at least three magnetic flux concentrator sections integrated on a planar substrate, each section being adjacent to at least one of the other sections and being separated by gaps. The sensor comprises at least a first sensing element positioned for sensing flux density in or near the gap between a first section and a second section and at least a second sensing element positioned for sensing flux density in or near the gap between the first section and at least a further section. The magnetic field sensor further comprises further sensing elements arranged to measure changes of the magnetic field in the direction perpendicular to the substrate.
Claims20
A magnetic field sensor comprising:
- at least three magnetic flux concentrator sections integrated on a substrate defining a plane, each of the at least three sections being adjacent to at least one of the other sections, and each of the at least three sections being separated from each of the other sections by one or more first gaps,
- the magnetic field sensor comprising at least
- a first magnetic sensing element positioned for measuring flux density in or near the first gap between a first section and a second section, and
- at least a second magnetic sensing element positioned for measuring flux density in or near the first gap between the first section and a third section,
- wherein the magnetic field sensor further comprises one or more further sensing elements arranged to measure changes of the magnetic field in the direction perpendicular to the substrate,
- wherein
- the one or more further sensing elements are arranged at or outside external borders of the magnetic flux concentrator sections, or
- the one or more further sensing elements are arranged within one or more further gaps, the one or more further gaps being wider than the first gaps, or
- the one or more further sensing elements are positioned in an opening in one of the magnetic flux concentrator sections with the one or more further sensing elements being surrounded by material of said magnetic flux concentrator.
A method of determining a position, the method comprising:
- providing a magnetic field sensor;
- and
- using the magnetic field sensor to determine a position;
- wherein the magnetic field sensor includes at least three magnetic flux concentrator sections integrated on a substrate defining a plane, each of the at least three sections being adjacent to at least one of the other sections, and each of the at least three sections being separated from each of the other sections by one or more first gaps,
- the magnetic field sensor further including at least
- a first magnetic sensing element positioned for measuring flux density in or near the first gap between a first section and a second section, and
- at least a second magnetic sensing element positioned for measuring flux density in or near the first gap between the first section and a third section,
- wherein the magnetic field sensor further includes one or more further sensing elements arranged to measure changes of the magnetic field in the direction perpendicular to the substrate,
- wherein
- the one or more further sensing elements are arranged at or outside external borders of the magnetic flux concentrator sections, or
- the one or more further sensing elements are arranged within one or more further gaps, the one or more further gaps being wider than the first gaps, or
- the one or more further sensing elements are positioned in an opening in one of the magnetic flux concentrator sections with the one or more further sensing elements being surrounded by material of said magnetic flux concentrator.
A magnetic field sensor comprising:
- magnetic flux concentrator sections including at least a first section, a second section, and a third section, each of the magnetic flux concentrator sections being
- integrated on a substrate that defines a plane,
- adjacent to at least one of the other sections, and
- separated by a gap such that
- the first section and the second section are separate by a first gap,
- the first section and the third section are separated by a second gap, and
- the second section and the third section are separated by a third gap;
- a first magnetic sensing element positioned for measuring flux density in or near the first gap;
- and
- a second magnetic sensing element positioned for measuring flux density in or near the second gap;
- and
- a third sensing element arranged to a measure change of the magnetic field in a direction perpendicular to the substrate.
Dependencies are inferred from the claim text.