Multilayer Ceramic Capacitor Electrode Configuration for ESL Reduction
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Solution Overview
Problem
There is a need for further reduction in equivalent series inductance (ESL) in electronic components, as existing configurations do not adequately minimize ESL despite efforts to reduce it.
Innovation Solution
The electronic component design includes a multilayer body with multiple dielectric layers and inner electrodes, featuring a specific arrangement of outer electrodes on the main surfaces with alternating polarities, connected via side-surface electrodes and via conductors, which reduces the distance between electrodes of different polarities, thereby minimizing ESL.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If signal is transmitted in long-side direction of the first main surface, then the signal path is longer and narrower, but equivalent series inductance (ESL) is increased
Solution Approach 1:
The patent transitions from a conventional two-dimensional electrode arrangement (top and bottom surfaces only) to a three-dimensional configuration by adding side-surface electrodes on the lateral surfaces of the multilayer body. This dimensional expansion creates additional current paths that reduce inductance by providing multiple parallel routes for current flow, effectively lowering the equivalent series inductance beyond what is achievable with planar electrode arrangements alone.
Solution Approach 2:
The patent divides the electrode system into multiple segmented components: top-surface electrodes, bottom-surface electrodes, and side-surface electrodes. These segmented electrodes are strategically positioned and electrically connected to create a distributed current path network. The segmentation allows current to flow through multiple parallel paths simultaneously, reducing the overall inductance by distributing the magnetic field generation across multiple smaller current loops rather than a single large loop.
2Reliability
If more outer electrodes are added to reduce ESL, then ESL is reduced, but device complexity increases
Solution Approach 1:
The side-surface electrodes serve multiple functions simultaneously: they act as additional terminals for reducing inductance, provide mechanical support for the multilayer structure, and can be configured to provide electrical connection between internal layers. This multi-functionality allows the electrode system to achieve superior ESL reduction without proportionally increasing complexity, as the same structural elements fulfill multiple roles in the overall device performance.
Solution Approach 2:
The patent merges the functions of top electrodes, bottom electrodes, and side electrodes into a unified electrode system where all electrode types are electrically interconnected. By combining these different electrode configurations into a single integrated structure with common electrical connections, the patent achieves synergistic ESL reduction while avoiding the complexity that would result from treating them as separate, independent systems. The merged structure allows current to flow through multiple paths simultaneously without requiring complex external wiring.
Data Source
AI summary
An electronic component includes a multilayer body including dielectric layers and inner electrodes alternately laminated together, first to third outer electrodes arranged in this order in one direction on a first main surface of the multilayer body, and fourth to sixth outer electrodes provided on a second main surface opposite to the first main surface such that at least a portion of the fourth outer electrode, at least a portion of the fifth outer electrode, and at least a portion of the sixth outer electrode respectively face the first outer electrode, the second outer electrode, and the third outer electrode. The first, third, and fifth outer electrodes are electrically connected to one another. The second, fourth, and sixth outer electrodes are electrically connected to one another and each have a polarity different from that of the first outer electrode.