Magnetic Sensor Bridge Circuit for High Spatial Resolution
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Solution Overview
Problem
Existing sensors using magnetic layers face challenges in improving their characteristics, particularly in achieving high spatial resolution and sensitivity in detecting magnetic fields.
Innovation Solution
The sensor design includes an element portion with specific configurations of magnetic members, opposing magnetic members, and elements with magnetic layers, arranged to form a bridge circuit. This configuration allows for efficient detection of magnetic fields with high spatial resolution and sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a magnetic layer sensor is used, then magnetic field detection capability is provided, but spatial resolution and sensitivity are insufficient
Solution Approach 1:
The sensor divides the detection area into multiple independent sensing elements (first sensing element, second sensing element, third sensing element, fourth sensing element) arranged in a bridge circuit configuration. Each element has its own magnetic layer and contributes to the overall detection capability, enabling both high spatial resolution through multiple discrete elements and improved sensitivity through their combined operation in the bridge circuit.
2Reliability
If magnetic members and opposing magnetic members are added to improve sensitivity, then detection sensitivity increases, but device complexity increases
Solution Approach 1:
The sensor integrates multiple functional components (magnetic layers, magnetic members, opposing magnetic members, electrode patterns) into a unified structure where the first and second sensing elements form one functional unit and the third and fourth sensing elements form another. This merging of components into coordinated functional units achieves high detection sensitivity while managing structural complexity through systematic integration.
Solution Approach 2:
The magnetic members and opposing magnetic members serve multiple functions: they generate the magnetic field for detection, define the sensing region, and contribute to the overall magnetic circuit. This multi-functionality reduces the need for separate dedicated components, thereby improving sensitivity without proportionally increasing device complexity.
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 sensor achieves improved spatial resolution and sensitivity in detecting magnetic fields, enabling more accurate and precise measurements compared to conventional sensors.
Implementation Method 1
a first element (11) including a first magnetic layer (11a)
Data Source
AI summary
According to one embodiment, a sensor includes an element portion. The element portion includes a first magnetic member, a first opposing magnetic member, a first element, a second magnetic member, a second opposing magnetic member, a second element, a third element, and a fourth element. The first opposing magnetic member is separated from the first magnetic member in a first direction from the first magnetic member to the first opposing magnetic member. The first element includes a first magnetic layer, a first portion and a first other portion. The second opposing magnetic member is separated from the second magnetic member in the first direction. The second element includes a second magnetic layer, a second portion and a second other portion. The third element includes a third portion and a third other portion. The fourth element includes a fourth portion and a fourth other portion.