Segmented Shield Layout for Inductor Module Eddy Current Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional modules with inductors suffer from deterioration of electrical characteristics due to a magnetic field generated by an eddy current, which affects the performance of the inductors.
Innovation Solution
A module configuration that includes a substrate with inductors, a resin sealing portion, a ground conductor portion, and linear conductor portions, where the linear conductor portions are electrically connected to the ground conductor portion and formed on the resin sealing portion with gaps, thereby underlying the inductors and reducing the magnetic field impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shield layer is provided to cover the resin sealing portion, then electromagnetic shielding is improved, but eddy current is generated which deteriorates inductor electrical characteristics
Solution Approach 1:
The shield layer is segmented into multiple linear conductor portions with gaps between them, preventing continuous eddy current paths while maintaining electromagnetic shielding effectiveness
Solution Approach 2:
The shield layer has different properties in different regions: linear conductor portions provide shielding where needed, while gaps are strategically positioned to interrupt eddy current paths without compromising overall shielding performance
2Object-affected harmful factors
If a continuous shield layer is used to cover the inductor, then magnetic field shielding is enhanced, but eddy current magnitude increases causing greater deterioration of inductor characteristics
Solution Approach 1:
The continuous shield layer is divided into discrete linear conductor portions separated by gaps, which interrupt eddy current paths and reduce eddy current magnitude while preserving magnetic field shielding capability
Solution Approach 2:
The gaps between linear conductor portions act as intermediaries that block eddy current flow paths, preventing the formation of large eddy current loops that would generate harmful magnetic fields
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 module effectively suppresses the deterioration of electrical characteristics of the inductors by reducing the strength of the magnetic field generated by the eddy current, thereby maintaining the performance of the inductors.
Implementation Method 1
In the shield layer, an eddy current is generated with this magnetic field line serving as a central axis. The eddy current generates a magnetic field that would cancel a magnetic field generated by the magnetic field line described above.
Implementation Method 2
a magnetic field line generated when a current flows through the inductor reaches the shield layer. In the shield layer, an eddy current is generated with this magnetic field line serving as a central axis.
Data Source
AI summary
A module is provided with a substrate having a main surface, and each of one or more inductors that are disposed on the main surface of the substrate. A resin sealing portion seals the one or more inductors and covers the main surface of the substrate. A ground conductor is disposed on an outer peripheral side of the substrate with respect to entirety of the one or more inductors in a plan view. A plurality of linear conductors are disposed on the resin sealing portion. The plurality of linear conductors are disposed with gaps therebetween, such that the one or more inductors underlie at least one of the plurality of linear conductors in the plan view.