Integrated Flux Gate Sensor on Component Carrier
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Solution Overview
Problem
Conventional magnetic field sensors, such as flux gate sensors, require significant space, lack reliability, accuracy, and sensitivity, and have high energy consumption.
Innovation Solution
A component carrier with integrated flux gate sensors is designed, featuring a stack of electrically conductive and insulating layer structures, including an excitation coil and sensor coils, with magnetic structures above and below the coils to focus magnetic flux lines, reducing energy requirements while maintaining sensitivity and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional flux gate sensors are used, then magnetic field detection capability is achieved, but the sensor occupies significant space and consumes high energy
Solution Approach 1:
The patent transitions from a conventional planar flux gate sensor to a three-dimensional structure by stacking multiple magnetic cores and coils in vertical layers. The magnetic core is divided into multiple segments arranged in different planes, with excitation coils and sensing coils positioned at different heights. This spatial arrangement in multiple dimensions allows the sensor to achieve compact footprint while maintaining detection capability and reducing energy consumption through improved magnetic flux path efficiency.
2Reliability
If conventional flux gate sensors are used, then magnetic field detection is possible, but reliability and accuracy are insufficient
Solution Approach 1:
The magnetic core is segmented into multiple distinct magnetic core segments arranged in different planes, with each segment having its own excitation coil and sensing coil. This segmentation allows independent optimization of each sensing element, improves the magnetic flux distribution, and enhances both reliability through redundancy and measurement accuracy through differentiated sensing zones. The segmented structure enables better control over magnetic flux paths and reduces interference between sensing elements.
3Measurement precision
If conventional flux gate sensors are used, then magnetic field sensing is achieved, but sensitivity is limited
Solution Approach 1:
The patent implements a nested structure where multiple magnetic core segments and coil windings are arranged in concentric or overlapping configurations across different planes. The excitation coils and sensing coils are positioned to create nested magnetic flux paths that enhance field concentration around the sensing regions. This nesting approach increases sensitivity by concentrating magnetic flux in the sensing zones while maintaining a compact overall sensor area through efficient spatial utilization.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables a compact, reliable, and sensitive magnetic field sensor with improved energy efficiency, capable of measuring magnetic fields in multiple directions, achieving similar sensitivity to conventional sensors with reduced energy consumption.
Implementation Method 1
By supplying the energizing coil with an appropriate AC excitation current, it is possible to bring the magnetic core into a series of cycles of magnetic saturation
Implementation Method 2
bring the magnetic core into a series of cycles of magnetic saturation
Implementation Method 3
Sensing of external fields is obtained via a pair of sensing coils, generally set underneath the ends of the magnetic core
Data Source
AI summary
A component carrier with an integrated magnetic field sensor is disclosed. The component carrier includes a plurality of electrically conductive layer structures and/or electrically insulating layer structures; an excitation coil and sensor coils arranged on and/or in the layer structures; a first magnetic structure above the excitation coil and sensor coils; and a second magnetic structure below the excitation coil and sensor coils.