Multi-Electrode Hall Element for Two-Directional Magnetic Field Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing Hall elements can only detect magnetic fields in one direction, limiting their application in detecting magnetic fields in two or more directions, which is necessary for various technological applications.
Innovation Solution
A Hall element design that includes multiple electrodes and insulation layers on a semiconductor substrate, allowing for the detection of magnetic fields in two directions by generating Hall voltages from currents flowing perpendicular and parallel to the substrate surface, with a control circuit to differentiate between these voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single-axis Hall element is used, then the device complexity is low, but the detection capability is limited to one direction
Solution Approach 1:
The patent combines multiple detection functions into a single Hall element by integrating multiple electrode groups (first and second detection electrode groups) that can detect magnetic fields in different directions simultaneously. This merging approach enables two-directional detection capability while maintaining a unified device structure, resolving the contradiction between enhanced adaptability and device complexity.
Solution Approach 2:
The Hall element is designed with multi-functionality by incorporating both first and second drive electrodes along with corresponding detection electrode groups, allowing the same device to detect magnetic fields in multiple directions (first direction and second direction perpendicular to the first). This universal design enables the single device to perform multiple detection functions without requiring separate single-axis sensors.
2Measurement precision
If multiple electrodes and insulation layers are added for two-directional detection, then the detection accuracy improves, but the manufacturing precision requirements increase
Solution Approach 1:
The patent extends the detection capability from one dimension to two dimensions by adding electrode groups arranged in perpendicular directions. The first detection electrode group detects magnetic fields in the first direction while the second detection electrode group detects magnetic fields in the second direction, achieving two-directional detection accuracy through dimensional extension without requiring excessively complex manufacturing processes.
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
Enables the detection of magnetic fields in two directions while maintaining a compact sensor size, improving detection accuracy and sensitivity compared to single-axis detection systems.
Implementation Method 1
a detection electrode group including a first electrode group that detects a Hall voltage generated by a current of components perpendicular to a surface of the substrate
Data Source
AI summary
Provided is a Hall element that detects a magnetic field. The Hall element includes a substrate including a semiconductor region, a first drive electrode arranged on the substrate, a first ground electrode arranged on the substrate separately from the first drive electrode in a first direction, a second ground electrode arranged on the substrate separately from the first drive electrode in a second direction different from the first direction, and a detection electrode group including a first electrode group that detects a Hall voltage generated by a current of components perpendicular to a surface of the substrate, the current flowing from the first drive electrode to the first ground electrode and the second ground electrode.