MLCC External Electrode Recess for Halation-Free Inspection
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Solution Overview
Problem
The reduction in size and thickness of multilayer ceramic capacitors leads to strength issues and visual inspection challenges due to increased luminance and halation during mounting, making accurate recognition difficult.
Innovation Solution
A multilayer ceramic electronic component design with a multilayer body having ceramic and internal electrode layers, and external electrodes with recesses on the surface to reduce luminance and prevent halation, ensuring accurate visual inspection and improved strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the thickness of multilayer ceramic capacitor is reduced, then the size of electronic device is reduced, but the strength of the capacitor deteriorates
Solution Approach 1:
The patent applies preliminary action by forming a reinforcement structure within the ceramic body before final assembly. The band-shaped reinforcement member is embedded in the ceramic green sheet during the stacking process, creating internal support that prevents breakage before the capacitor is put into service. This preliminary reinforcement allows the capacitor to maintain strength despite reduced thickness.
2Shape
If the thickness of multilayer ceramic capacitor is reduced, then the flatness of external electrode is improved, but the luminance increases causing halation in visual inspection
Solution Approach 1:
The patent applies local quality by creating a localized recess portion in specific areas of the external electrode surface. Instead of modifying the entire surface, the recess is formed only in the region where halation occurs during visual inspection. This localized modification reduces luminance and prevents halation while maintaining the overall flatness and electrical functionality of the external electrode.
Data Source
AI summary
A multilayer ceramic capacitor includes a multilayer body including layered ceramic layers and internal electrode layers, and an external electrode on a side surface of the multilayer body and connected to the internal electrode layers. A recess is provided in a surface of the external electrode on one side of opposing main surfaces of the multilayer ceramic capacitor.