Multilayer Ceramic Component Rounded Corners Electrode Integrity
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Solution Overview
Problem
The reliability and rigidity of external electrodes in multilayer ceramic electronic components are compromised as they are thinned for miniaturization, often resulting in the formation of holes at corners, which degrade wet resistance and installation reliability.
Innovation Solution
A multilayer ceramic electronic component design featuring a hexahedral ceramic body with rounded corners, where the external electrodes are formed with base electrode layers that partially contact the ceramic body and covered by plating layers, maintaining a specific CP/CT or CP/ET ratio to prevent hole formation and ensure thinness, thereby enhancing reliability and rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the external electrode is thinned for miniaturization, then the size of the multilayer ceramic electronic component is reduced, but the reliability and rigidity of the external electrode are degraded and holes form at corners
Solution Approach 1:
The patent applies curvature by rounding the corners of the ceramic body instead of using sharp corners. This rounded corner design allows the thin external electrode to conform to a curved surface, preventing stress concentration and hole formation at corner regions while maintaining the thinned profile for miniaturization
Solution Approach 2:
The patent changes the geometric parameter of the ceramic body by introducing rounded corners with a specific radius of curvature. This parameter modification enables the external electrode to maintain structural integrity at corners even when thinned, resolving the contradiction between miniaturization and reliability
2Productivity
If the external electrode is thinned, then the component achieves high performance and miniaturization, but wet resistance and installation reliability are compromised due to hole formation
Solution Approach 1:
The rounded corner design eliminates sharp edges where holes typically form during thinning processes. The curved geometry distributes stress uniformly and prevents the formation of defects that would compromise wet resistance and installation reliability while maintaining the thinned electrode structure
3Length of moving object
If the external electrode is made thin, then the component size is reduced, but the external electrode develops holes at corner positions affecting structural integrity
Solution Approach 1:
The patent introduces rounded corners with a controlled radius of curvature on the ceramic body. This curvature allows the thin external electrode to maintain continuous coverage over corner regions, preventing hole formation and preserving structural integrity while enabling the electrode to be made thin for miniaturization
Data Source
AI summary
A multilayer ceramic electronic component includes: a ceramic body having a hexahedral shape including at least one rounded corner and including dielectric layers and first and second internal electrodes, and first and second external electrodes. The first and second external electrodes respectively include first and second base electrode layers which at least partially contact the first and second external sides of the ceramic body, and first and second plating layers disposed to cover the first and second base electrode layers, respectively. CP/CT is equal to or greater than 1.6 and equal to or less than 2.4, where CP is a length of a rounded boundary line of the rounded corner of the ceramic body viewed in a cross-section in length and thickness directions, and CT is a thickness of one of the first and second base electrode layers at a central point in the thickness direction.