Multi-Layer Ceramic Capacitor Side Margin Extension
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Solution Overview
Problem
Multi-layer ceramic capacitors face challenges in ensuring insulation properties due to moisture infiltration through thin side margins, which complicates the miniaturization and increased capacitance demands in electronic devices.
Innovation Solution
A multi-layer ceramic electronic component design featuring a side-surface-covering portion and an extended end portion on the side margin, where the end portion extends onto the main surface, increasing the path for moisture infiltration and providing high moisture resistance by suppressing peeling and reducing porosity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If side margins are made thinner to enable miniaturization and increase capacitance, then the internal electrodes can be enlarged and device size reduced, but moisture infiltration becomes more likely and insulation properties deteriorate
Solution Approach 1:
The side margin structure transitions from a conventional planar configuration to a three-dimensional structure with an extended portion that protrudes toward the opposite side surface. This dimensional change creates a longer moisture infiltration path without increasing the overall device footprint, effectively decoupling the side margin thickness from its moisture barrier function.
Solution Approach 2:
The extended portion of the side margin is positioned in advance to intercept moisture before it reaches the internal electrodes. By extending the side margin toward the opposite side surface, the structure proactively blocks moisture infiltration paths at multiple locations, preventing moisture from reaching critical insulation regions.
2Quantity of substance
If side margins are made thinner to meet miniaturization demands, then capacitance can be increased, but moisture resistance deteriorates and peeling occurs more easily
Solution Approach 1:
The side margin extends in the thickness direction toward the opposite side surface, creating a multi-level barrier structure. This dimensional extension increases the effective moisture barrier length without consuming additional lateral space, allowing thinner side margins to maintain high capacitance while improving moisture resistance.
Solution Approach 2:
The side margin structure exhibits non-uniform thickness distribution, with the extended portion providing enhanced moisture barrier function at critical locations. This local quality enhancement allows the side margin to be thinner in non-critical areas while maintaining robust moisture protection where needed, thereby increasing overall capacitance without sacrificing reliability.
3Length of moving object
If side margins are made thinner to enable miniaturization, then device dimensions can be reduced, but peeling resistance deteriorates
Solution Approach 1:
The side margin extends toward the opposite side surface, creating anchor points that mechanically interlock with the internal electrode structure. This three-dimensional configuration increases peeling resistance by distributing stress across multiple attachment points, allowing the side margin to be thinner without compromising structural integrity.
Data Source
AI summary
A multi-layer ceramic electronic component includes a multi-layer unit and a side margin. The multi-layer unit includes ceramic layers laminated in a first direction, internal electrodes disposed between the ceramic layers, a main surface that faces in the first direction, and a side surface that faces in a second direction orthogonal to the first direction, the internal electrodes being exposed from the side surface. The side margin includes a side-surface-covering portion that is disposed on the side surface, and an end portion that includes an extended portion extending from the side surface to the main surface and having a first dimension of 0.1 μm or more in the first direction and a second dimension of 0.1 μm or more in the second direction.