Multilayer Ceramic Capacitor Electrode Spacing for Edge Reliability
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Solution Overview
Problem
The overlapping state of internal electrode layers and dielectric layers in multilayer ceramic capacitors is complex, leading to potential step differences and reduced reliability due to the thickness of internal electrode layers, which can be exacerbated by the provision of auxiliary layers extending over the edges.
Innovation Solution
The multilayer ceramic capacitor design includes a configuration where the distance between adjacent internal electrode layers in specific edge and transition regions is adjusted, with the first distance being longer than the second distance, thereby controlling the overlapping state and reducing the risk of reliability issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If internal electrode layers have uniform thickness, then manufacturing is simplified, but step differences occur due to lamination complexity, worsening reliability
Solution Approach 1:
The patent applies local quality by introducing thickness variation in specific regions rather than maintaining uniform thickness throughout. Internal electrode layers in the first and second regions have different thicknesses compared to other regions, allowing the structure to accommodate lamination complexity and reduce step differences in critical areas while maintaining ease of manufacture through localized rather than global modifications.
Data Source
AI summary
A multilayer ceramic capacitor includes a portion where a first distance is greater than a second distance. The first distance is a distance between adjacent second internal electrode layers along a stacking direction and a distance between second internal electrode layers which, in first edge regions, overlap first internal electrode layers along the stacking direction. The second distance is a distance between adjacent first internal electrode layers along the stacking direction and a distance between the first internal electrode layers which, in first transition regions, do not overlap the second internal electrode layers along the stacking direction.