MLCC Metal Frame Structure for Flex Crack Resistance
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Solution Overview
Problem
Multilayer ceramic capacitors face issues with flex cracks and separation from external electrodes due to external stresses during mounting and temperature cycles, compromising thermal and mechanical reliability.
Innovation Solution
The electronic component incorporates a metal frame structure with support parts and connection parts that securely attach to the external electrodes of the ceramic capacitor, reducing flex cracks and maintaining stability under stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multilayer ceramic capacitor is mounted on a substrate, then it can be used in electronic devices and power drive systems, but flex cracks may occur at the external electrodes due to external stresses
Solution Approach 1:
A metal frame is provided in advance around the ceramic capacitor body to cushion and distribute external stresses before they can reach the external electrodes. The metal frame acts as a protective barrier that absorbs mechanical shocks and prevents flex cracks from forming at the vulnerable electrode regions during mounting and operation.
Solution Approach 2:
The invention combines the ceramic capacitor body with a metal frame structure to create a composite component. The metal frame provides enhanced mechanical strength and stress distribution, while the ceramic body maintains its electrical function, creating a hybrid structure that leverages the advantages of both materials to prevent flex cracks.
2Productivity
If the ceramic capacitor is made compact for high density mounting, then space efficiency improves, but the capacitor becomes more susceptible to vibration and deformation
Solution Approach 1:
The protective structure is segmented into four separate metal frames positioned at each corner of the ceramic capacitor body. This segmentation allows each frame to independently support and stabilize the capacitor, providing robust protection against vibration and deformation while maintaining a compact overall structure suitable for high-density mounting.
Solution Approach 2:
The combination of compact ceramic body with corner-mounted metal frames creates a composite structure that enhances mechanical durability without significantly increasing the overall footprint, enabling both high mounting density and improved resistance to vibration and deformation.
3Reliability
If metal frames are added to support the ceramic capacitor, then flex crack resistance improves, but the device complexity increases
Solution Approach 1:
The support structure is divided into four separate metal frames positioned at the corners rather than using a single continuous frame. This segmentation simplifies the manufacturing process and assembly, as each corner frame can be independently positioned and attached, while still providing comprehensive mechanical and thermal support to enhance reliability.
Solution Approach 2:
The metal frames act as intermediary elements between the ceramic capacitor body and the external environment, absorbing and distributing mechanical and thermal stresses. This intermediary structure protects the capacitor without requiring direct modification of the ceramic body, maintaining simplicity in the core capacitor design while adding protection through separate, easily attachable frames.
Data Source
AI summary
An electronic component including: a ceramic main body; first and second external electrodes respectively provided on two opposite end surfaces spaced apart from each other in a longitudinal direction of the ceramic main body; a first metal frame including a first junction part joined to the first external electrode, a first support part extending from the first junction part in the longitudinal direction of the ceramic main body and configured to support the first external electrode, a first base part parallel to the first support part, and a first connection part configured to connect the first support part and the first base part, wherein the first connection part is connected to a point spaced apart from one end of the first support part along the longitudinal direction of the ceramic main body.