Segmented MLCC Electrodes for Wideband Impedance Control
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Solution Overview
Problem
Multilayer ceramic capacitors (MLCCs) face challenges in effectively controlling impedance across a wide frequency band, particularly in power supply devices where voltage noise due to rapid load current changes is a concern, and they often require multiple components to achieve this.
Innovation Solution
A capacitor component design featuring a stack structure with alternating dielectric layers and internal electrodes divided into regions of different sizes, allowing for the generation of multiple resonant frequencies and effective impedance control across a wide frequency band, thereby reducing the need for multiple decoupling capacitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single MLCC is used to control impedance, then the component count is low, but the impedance control across wide frequency band is insufficient
Solution Approach 1:
The internal electrode is divided into multiple regions (first region, second region, third region, fourth region) with different capacitance values. Each region contributes to different resonant frequencies, enabling a single capacitor component to provide impedance control across a wide frequency band instead of requiring multiple separate capacitors.
Solution Approach 2:
The patent changes the capacitance parameters of different electrode regions to create distinct resonant frequencies. By adjusting the capacitance values in each region while keeping the basic structure unified, the component achieves multi-frequency impedance control capability.
2Adaptability or versatility
If multiple decoupling capacitors are used to control impedance across wide frequency band, then the impedance control is improved, but the mounting space and cost increase
Solution Approach 1:
The patent merges the functions of multiple decoupling capacitors into a single MLCC component. By integrating multiple electrode regions with different capacitance values within one component, it combines the impedance control capabilities of multiple capacitors while occupying the space of only one component on the circuit board.
Solution Approach 2:
The single capacitor component performs multiple functions by providing impedance control at multiple resonant frequencies simultaneously. This multi-functionality replaces what would traditionally require several separate capacitors, reducing both mounting space and component complexity.
3Adaptability or versatility
If the internal electrode is divided into multiple regions with different capacitances, then multiple resonant frequencies are generated for wide band impedance control, but the device complexity increases
Solution Approach 1:
The internal electrode is segmented into distinct regions (first, second, third, fourth regions) where each region has a different capacitance value. This segmentation enables the generation of multiple resonant frequencies from a single component, providing wide band impedance control without requiring multiple separate components.
Solution Approach 2:
Different regions of the internal electrode are assigned different local properties (capacitance values) to optimize performance at different frequencies. The first and second regions have different capacitances, as do the third and fourth regions, allowing each region to contribute to specific resonant frequency characteristics.
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 design effectively maintains low impedance across a wide frequency band, reducing the number of capacitors required in power supply devices and minimizing mounting costs and space, while also providing a compact size.
Implementation Method 1
A capacitor component design featuring a stack structure with alternating dielectric layers and internal electrodes divided into regions of different sizes, allowing for the generation of multiple resonant frequencies and effective impedance control across a wide frequency band
Implementation Method 2
a stack structure including a plurality of dielectric layers, and a first internal electrode and a second internal electrode disposed alternately with at least one of the plurality of dielectric layers interposed therebetween
Data Source
AI summary
A capacitor component includes a body having a first surface, a second surface, a third surface, a fourth surface, a stack structure including a plurality of dielectric layers, and a first internal electrode and a second internal electrode, a first external electrode formed on the first surface and the fourth surface, and a second external electrode formed on the second surface and the fourth surface. The first internal electrode includes a first region and a second region, the first region being connected to the first external electrode by a lead extending to the fourth surface, and the second region being connected to the first external electrode by a lead extending to the first surface. The second internal electrode includes a third region and a fourth region, the fourth region being connected to the second external electrode by a lead extending to the second surface.