Magnetism Sensor Wiring Layout for Interference-Balanced Detection
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Solution Overview
Problem
Existing magnetism detection devices face challenges in efficiently integrating magnetism detection elements with terminals and wiring configurations, leading to potential interference and inefficiencies in signal processing.
Innovation Solution
A semiconductor-based magnetism detection device with a specific terminal and wiring arrangement, including a driver element and protection element, that optimizes the connection between the magnetism detection element and terminals, ensuring balanced current flow and reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the magnetism detection element is integrated with terminals and wiring on a substrate, then device integration is improved, but interference between wiring and detection element increases
Solution Approach 1:
The patent applies the 'Blessing in disguise' principle by utilizing the magnetic field generated by the front surface wiring as a useful function. Instead of treating the wiring's magnetic field merely as interference to be eliminated, the invention configures the wiring to generate a magnetic field that assists the magnetism detection element in detecting target objects. The wiring serves dual purposes: electrical connection and magnetic field generation for detection enhancement.
Solution Approach 2:
The front surface wiring is designed to perform multiple functions simultaneously: (1) electrical connection between terminals, (2) generation of magnetic field for detection assistance, and (3) structural support. This multi-functionality reduces the need for separate components and minimizes interference while improving integration efficiency.
2Area of stationary object
If wiring is placed close to the magnetism detection element for compact design, then device area is reduced, but magnetic interference increases
Solution Approach 1:
The patent converts the potentially harmful magnetic interference from closely-placed wiring into a beneficial effect. The wiring is strategically positioned and configured to generate a magnetic field that complements the detection element's operation, allowing compact design without sacrificing detection performance.
Solution Approach 2:
The invention changes the parameters of the wiring configuration (material, geometry, current characteristics) to control the magnetic field characteristics. By adjusting these parameters, the wiring generates a magnetic field with appropriate strength and direction that assists detection rather than interfering with it.
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 proposed configuration enhances signal processing efficiency by minimizing interference and optimizing current distribution, thereby improving the overall performance of the magnetism detection device.
Implementation Method 1
a first wiring 71 configured to apply a magnetic field including a first direction component MZ1 along a Z direction to the magnetism detection element 30, and a second wiring 72 configured to apply a magnetic field including a second direction component MZ2, which is in the opposite direction to the first direction component MZ1, to the magnetism detection element 30
Data Source
AI summary
A magnetism detection device includes: a substrate having a substrate front surface; a magnetism detection element provided at the substrate front surface; a first terminal and a second terminal arranged at positions on the substrate front surface separated from the magnetism detection element; and a front surface wiring formed over the substrate front surface and configured to electrically connect the first terminal and the second terminal, wherein the front surface wiring includes: a first wiring applying a magnetic field including a first direction component along a thickness direction of the substrate to the magnetism detection element when a current flows from the first terminal to the second terminal; and a second wiring applying a magnetic field including a second direction component, which is in an opposite direction of the first direction component, to the magnetism detection element when the current flows from the first terminal to the second terminal.