Multilayer Ferrite Bead Inductor Side Electrode Junction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic components fail to maintain low impedance in lower frequency bands while achieving high impedance in higher frequency bands, leading to increased noise leakage and internal defects such as interlayer peeling in multilayer inductors.
Innovation Solution
A multilayer electronic component structure comprising magnetic layers and inner electrodes, with specific electrode arrangements and junctions to reduce DC resistance and enhance adhesion between layers, allowing for higher impedance in higher frequency bands and lower impedance in lower frequency bands, while preventing interlayer peeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If resistance component is enhanced in high frequency band, then high frequency noise filtering is improved, but DC resistance and impedance in lower frequency band increase
Solution Approach 1:
The patent applies local quality by creating a junction structure specifically at the interface between magnetic layers where inner electrodes contact, rather than uniformly treating the entire component. This localized junction formation with controlled area ratio (greater than 0.2) targets specifically the high frequency loss mechanism at layer interfaces while preserving the bulk properties of magnetic layers and electrodes, thereby achieving frequency-selective resistance characteristics without increasing DC resistance.
Solution Approach 2:
The patent changes the physical and chemical parameters at the junction interface between magnetic layers, specifically controlling the junction area ratio and forming conductive pathways that modify electrical properties. By adjusting the junction characteristics (area ratio, conductivity, thickness), the patent achieves different resistance characteristics at different frequencies, allowing high frequency noise filtering enhancement while maintaining low DC resistance.
2Object-affected harmful factors
If resistance component is enhanced in high frequency band, then high frequency noise filtering is improved, but internal defects such as interlayer peeling increase
Solution Approach 1:
The patent applies preliminary anti-action by forming a junction structure at the magnetic layer interface that prevents interlayer peeling before it can occur during operation. The junction, with its controlled area ratio greater than 0.2, creates mechanical interlocking and chemical bonding that counteracts the peeling forces generated by thermal expansion differences and mechanical stress, thereby preventing internal defects while enabling enhanced resistance characteristics.
Solution Approach 2:
The patent employs composite materials by creating a junction structure that combines magnetic layers with conductive materials having different thermal and mechanical properties. This composite junction structure at the layer interface provides both electrical functionality (resistance control) and mechanical functionality (adhesion enhancement), preventing interlayer peeling while achieving the desired resistance characteristics for noise filtering.
3Reliability
If outer electrodes are arranged on side faces to reduce DC resistance, then electrode area is increased, but component structure becomes more complex
Solution Approach 1:
The patent applies dimensionality change by transitioning from conventional top-bottom electrode arrangement to side-face electrode placement. This spatial reconfiguration in a different dimension (from vertical stacking to horizontal side placement) increases the effective electrode area and reduces DC resistance while maintaining a compact component footprint. The inner electrodes extend through the component body to connect with side-face outer electrodes, creating an optimized current path.
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 structure effectively increases impedance in higher frequency bands to filter out high-frequency noises and maintains low impedance in lower frequency bands, while minimizing internal defects and DC resistance, thereby improving noise removal efficiency and component reliability.
Implementation Method 1
the resistance component of the bead inductor acts as the ESR (Equivalent Series Resistance) of the capacitor in the mounted structure. The resistance component of the bead inductor is constituted by the sum of the DC resistance component and the loss increasing in a higher frequency band.
Implementation Method 2
the inner electrode extends in the direction of the shorter sides shorter than the longer sides so as to connect with first and second outer electrodes, while the element body has a junction where the magnetic layers adjacent to each other in the stacking direction join together within an inner electrode region
Data Source
AI summary
A ferrite bead inductor comprises a ferrite bead element body having magnetic layers and inner electrodes stacked therein, and first and second outer electrodes arranged on first and second side faces of the ferrite bead element body. The inner electrode extends in the direction of shorter sides which are shorter than longer sides, so as to connect with the first and second outer electrodes. The ferrite bead element body has an interstice for allowing the magnetic layers adjacent to each other in the stacking direction to join together within an inner electrode region adapted to form the inner electrode on the magnetic layer.