Magnetoresistive Sensor Layout for Compact High-Accuracy Current Detection
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Solution Overview
Problem
Existing magnetic field detection apparatuses using magnetoresistive effect elements face challenges in reducing size while maintaining high detection accuracy.
Innovation Solution
The proposed solution involves a magnetic field detection apparatus comprising a magnetoresistive effect element with a magnetoresistive effect film extending in a first axis direction and a conductor with parts extending in a second axis direction inclined with respect to the first axis direction. The conductor is configured to generate an induction magnetic field applied to the magnetoresistive effect film, with specific overlapping configurations to enhance detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the magnetoresistive effect element and conductor are configured with specific overlapping arrangements to enhance detection accuracy, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The magnetoresistive effect film is divided into multiple regions (first end part, second end part, intermediate part) with different magnetic field application requirements. The conductor is segmented into corresponding parts that overlap with specific regions of the magnetoresistive effect film, allowing differentiated magnetic field application to enhance detection accuracy while maintaining manageable structural complexity.
Solution Approach 2:
Different regions of the magnetoresistive effect film are assigned different functional qualities: the end parts receive magnetic fields for setting/resetting magnetization, while the intermediate part detects magnetic fields. The conductor parts are positioned to provide localized magnetic fields to specific regions, optimizing each area's function and overall detection accuracy.
2Measurement precision
If the conductor parts are positioned to overlap the end parts of the magnetoresistive effect film for applying setting and resetting magnetic fields, then measurement precision is improved, but the area occupied by the apparatus increases
Solution Approach 1:
The conductor parts extend in a second axis direction that is inclined with respect to the first axis direction of the magnetoresistive effect film. This angular arrangement allows the conductor parts to overlap the end parts of the magnetoresistive effect film while utilizing spatial efficiency, reducing the overall area occupied by the apparatus compared to orthogonal arrangements.
Solution Approach 2:
The conductor parts are configured with curved or inclined extensions rather than straight orthogonal lines, allowing them to reach and overlap the end parts of the magnetoresistive effect film more efficiently in terms of space utilization, thereby reducing the total apparatus footprint while maintaining detection accuracy.
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
This configuration allows for high detection accuracy while minimizing the size of the apparatus, effectively addressing the limitations of existing technologies.
Implementation Method 1
The conductor is configured to be supplied with a current and thereby configured to generate an induction magnetic field to be applied to the magnetoresistive effect film
Implementation Method 2
a magnetoresistive effect element includes a magnetoresistive effect film that extends in a first axis direction
Data Source
AI summary
A magnetic field detection apparatus includes a magnetoresistive effect element and a conductor. The magnetoresistive effect element includes a magnetoresistive effect film extending in a first axis direction and including a first end part, a second end part, and an intermediate part between the first and second end parts. The conductor includes a first part and a second part that each extend in a second axis direction inclined with respect to the first axis direction. The conductor is configured to be supplied with a current and thereby configured to generate an induction magnetic field to be applied to the magnetoresistive effect film in a third axis direction orthogonal to the second axis direction. The first part and the second part respectively overlap the first end part and the second end part in a fourth axis direction orthogonal to both of the second axis direction and the third axis direction.