Sensor Chip Busbar Overlap for Magnetic Field Detection
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Solution Overview
Problem
Existing sensor devices face challenges in achieving reliable isolation and effective detection of magnetic fields induced by electric currents flowing through busbars, which affects sensor performance and accuracy.
Innovation Solution
The sensor device design includes a dielectric substrate with a busbar mechanically connected to it, a cavity for the sensor chip, and an encapsulation material that ensures the sensor chip overlaps the busbar in an orthogonal projection, allowing for non-contact detection of magnetic fields with improved isolation and signal conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor chip is placed close to the busbar for effective magnetic field detection, then measurement precision is improved, but electrical isolation between the sensor chip and busbar becomes more difficult to maintain
Solution Approach 1:
The patent introduces an encapsulation material as an intermediary substance positioned between the sensor chip and the busbar. This encapsulation material serves as a mediator that provides electrical isolation while allowing the sensor chip to remain in close proximity to the busbar for effective magnetic field detection, thus resolving the contradiction between measurement precision and electrical isolation reliability.
2Measurement precision
If magnetic field concentrators are added to enhance magnetic field detection, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts or removes the magnetic field concentrator component from the sensor device structure. By eliminating this component, the device complexity is reduced while maintaining effective magnetic field detection through the direct positioning of the sensor chip near the busbar, thus resolving the contradiction between measurement precision and 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
This configuration enhances sensor performance by ensuring reliable isolation and precise detection of magnetic fields, converting physical signals into electrical signals for further processing, while maintaining a coreless design without magnetic field concentrators.
Implementation Method 1
the sensor chip is designed to detect a magnetic field induced by an electric current flowing through the busbar
Data Source
AI summary
A sensor device comprises a dielectric substrate, a busbar mechanically connected to the dielectric substrate, a cavity formed in the dielectric substrate, and a sensor chip arranged in the cavity, wherein the sensor chip is designed to detect a magnetic field induced by an electric current flowing through the busbar, wherein in an orthogonal projection of the sensor chip onto the busbar, the sensor chip at least partly overlaps the busbar.