Multilayer Ceramic Capacitor Electrode Layout for Flexible Module Bending
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Solution Overview
Problem
In flexible display modules with reduced thickness, multilayer ceramic capacitors are prone to damage when the flexible housing bends and comes into contact with them, leading to instability and potential contact issues.
Innovation Solution
The design of multilayer ceramic capacitors with specific external electrode configurations, including horizontal and shoulder portions, that extend to multiple surfaces and have defined length ratios, reduces contact with the housing and enhances stability when mounted on a substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the flexible housing is bent to reduce module thickness, then the display module achieves flexibility and reduced thickness, but the housing may contact and damage the multilayer ceramic capacitors mounted on the substrate
Solution Approach 1:
The external electrodes extend beyond the lateral surfaces of the multilayer body to create an L-shaped configuration. This dimensional extension in the lateral direction provides a buffer zone that prevents contact between the housing and the capacitor body during bending, resolving the contradiction between reduced thickness and capacitor stability.
Solution Approach 2:
The external electrodes are pre-configured to extend beyond the lateral surfaces before any bending occurs. This preliminary geometric arrangement ensures that when the housing bends, the extended electrodes make contact first, protecting the main capacitor body from damage and maintaining reliability during flexing operations.
2Stability of the object's composition
If the external electrodes extend to multiple surfaces with specific length ratios, then the stability during mounting is improved, but the device complexity increases
Solution Approach 1:
The external electrodes exhibit local quality variations through their L-shaped configuration, with different extensions on different surfaces. The electrodes extend beyond lateral surfaces by specific length ratios (0.03-0.15 times the multilayer body length) to provide localized stability enhancement at mounting locations without uniformly increasing complexity throughout the entire device.
Solution Approach 2:
The external electrodes are configured asymmetrically, extending beyond the lateral surfaces of the multilayer body to create an L-shaped profile. This asymmetric extension pattern, with specific length ratios on different faces, optimizes mounting stability by providing differential support where needed while maintaining manufacturing feasibility through standardized geometric relationships.
Data Source
AI summary
In a multilayer ceramic capacitor, a relationship of a length in a width direction of a main surface horizontal portion to a length in the width direction of external electrodes is about 0.26 or more and about 0.56 or less, a relationship of a length in a lamination direction of a lateral surface horizontal portion to a length in a lamination direction of each of the external electrodes is about 0.26 or more and about 0.56 or less, a relationship of a length in a length direction of the main surface horizontal portion to a length in a length direction of each of the external electrodes is about 0.26 or more and about 0.56 or less, and a relationship of a length of the lateral surface horizontal portion to a length in a length direction of each of the external electrodes is about 0.26 or more ≤0.56.