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US 11,304,642 B2Granted
Multi-axial position sensors printed on a folded flexible circuit board
AssigneeBiosense Webster (Israel) Ltd.
InventorsAssaf Govari, Meir Bar-Tal, Avi Reuveni
Life of this patent
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Abstract
A position sensor includes a flexible substrate formed into a three-dimensional (3D) shape. At least first and second field-sensing coils are formed in first and second respective layers of the flexible substrate, such that in the 3D shape the first and second field-sensing coils have first and second respective axes that are not parallel to one another.
Claims19
A position sensor, comprising:
- (a) a flexible substrate, which is formed into a three-dimensional (3D) shape defining a central longitudinal axis;
- (b) a first field-sensing coil formed in a first layer of the flexible substrate, the first field-sensing coil defining a closed-loop shape about a first axis such that the first field-sensing coil fully encircles the first axis, the first axis being orthogonal to the central longitudinal axis, the first field-sensing coil being located at a first longitudinal position along the central longitudinal axis;
- (c) a second field-sensing coil formed in a second layer of the flexible substrate, the second field-sensing coil defining a closed-loop shape about a second axis such that the second field-sensing coil fully encircles the second axis, the second axis being coaxial with the central longitudinal axis such that the second field-sensing coil fully encircles the central longitudinal axis, the second field-sensing coil being located at the first longitudinal position along the central longitudinal axis such that the second field-sensing coil overlappingly wraps around the first field-sensing coil at the first longitudinal position along the central longitudinal axis;
- the first and second field-sensing coils being configured to sense components of a magnetic field oriented about the first and second respective axes.
1 more element
A method for producing a position sensor, the method comprising:
- (a) forming at least first and second field-sensing coils in first and second respective layers of a flexible substrate in a flat form, the first field-sensing coil being disposed in a stripe shape extending from one end of the flexible substrate in the flat form to another end of the flexible substrate in the flat form, the second field-sensing coil being disposed in a closed-loop shape and being embedded within the flexible substrate, the first and second field-sensing coils overlapping each other while the flexible substrate is in the flat form such that the stripe shape overlaps the closed-loop shape while the flexible substrate is in the flat form;
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- (b) forming the flexible substrate into the 3D shape, the 3D shape extending longitudinally along a first axis, the first field-sensing coil being positioned about the first axis in the 3D shape, the second field-sensing coil being positioned about a second axis in the 3D shape, the first and second axis being orthogonal to each other in the 3D shape, the first and second field-sensing coils in the 3D shape being configured to sense components of a magnetic field oriented about the first and second respective axes.
A position sensor, comprising:
- (a) a flexible substrate formed into a cylindrical shape, the flexible substrate defining an inward-facing surface and an outward-facing surface, the cylindrical shape defining a central longitudinal axis;
- (b) a first field-sensing coil formed on the outward-facing surface of the flexible substrate, the first field-sensing coil forming a closed-loop shape extending about a first axis centered within the first field-sensing coil, the first axis being orthogonal to the central longitudinal axis, the first field-sensing coil being located at a first longitudinal position along the central longitudinal axis;
- (c) a second field-sensing coil embedded internally within the flexible substrate, the second field-sensing coil forming a closed-loop shape extending about a second axis centered within the second field-sensing coil, the second axis being orthogonal to the central longitudinal axis, the second field-sensing coil being located at the first longitudinal position along the central longitudinal axis, a portion of the second field-sensing coil angularly overlapping with a portion of the first field-sensing coil about the central longitudinal axis;
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- (d) a third field-sensing coil formed on the inward-facing surface of the flexible substrate, the third field-sensing coil being located at the first longitudinal position along the central longitudinal axis, the third field-sensing coil forming a closed-loop shape extending about the central longitudinal axis such that the third field-sensing coil fully encircles the central longitudinal axis, the third field-sensing coil further overlappingly wrapping around the first and second field-sensing coils;
- each field-sensing coil separated by one or more dielectric layers and oriented about respective axes that are not parallel to one another, each field-sensing coil configured to sense a respective component of a magnetic field oriented about each respective axis.
3 more elements
Dependencies are inferred from the claim text.