Multilayer Ceramic Capacitor Side Margin Nickel Particle Control
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Solution Overview
Problem
The miniaturization and multi-functionalization of electronic components, such as multilayer ceramic capacitors, lead to reliability issues due to metal or metal oxide particles in side margin portions causing electric field concentration and short-circuits, which existing manufacturing methods fail to adequately address.
Innovation Solution
A multilayer ceramic capacitor design where nickel particles or nickel oxide are controlled in size within the side margin portions to maintain a diameter-to-thickness ratio of 0.8 or less, preventing electric field concentration and enhancing reliability by minimizing the thickness of these portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the side margin portion thickness is reduced to enable miniaturization and increase capacitance, then the electrode effective area increases and capacitance increases, but metal or metal oxide particles in the side margin portion cause electric field concentration and short-circuits, decreasing reliability
Solution Approach 1:
The patent changes the physical parameters of metal particles in the side margin portion by controlling their size (diameter-to-thickness ratio of 0.8 or less) and distribution density. This parameter control prevents electric field concentration while maintaining the miniaturized structure, resolving the contradiction between miniaturization and reliability.
Solution Approach 2:
The patent applies different quality requirements to different regions: the side margin portion contains controlled metal particles with specific size ratios, while the main body maintains standard electrode structures. This local differentiation allows miniaturization in critical areas while preventing harmful electric field concentration where metal particles are present.
2Ease of manufacture
If metal or metal oxide particles are present in the side margin portion, then the manufacturing process is simplified, but electric field concentration occurs causing short-circuits and decreasing reliability
Solution Approach 1:
The patent specifies precise parameter ranges for metal particles (diameter-to-thickness ratio ≤ 0.8) that balance manufacturing simplicity with reliability. Within this parameter range, standard manufacturing processes can be used without complex additional steps, while still preventing electric field concentration and short-circuits.
3Productivity
If the diameter of metal particles in the side margin portion is increased, then the manufacturing process becomes simpler, but electric field concentration increases causing short-circuits
Solution Approach 1:
The patent optimizes the diameter parameter of metal particles by setting the diameter-to-thickness ratio at 0.8 or less. This parameter optimization enables efficient manufacturing with standard processes while preventing electric field concentration that would cause short-circuits, thus maintaining high productivity without compromising reliability.
Data Source
AI summary
A multilayer ceramic capacitor includes: a ceramic body including dielectric layers and having first and second surfaces opposing each other, third and fourth surfaces connecting the first and second surfaces to each other, and fifth and sixth surfaces connected to the first to fourth surfaces and opposing each other; a plurality of internal electrodes disposed in the ceramic body, each exposed to the first and second surfaces and having one ends exposed to the third or fourth surface; and a first side margin portion and a second side margin portion disposed, respectively, on the first and second surfaces of the ceramic body, wherein a metal or a metal oxide is disposed in each of the first and second side margin portions, and a ratio of a diameter of the metal or the metal oxide to a thickness of the dielectric layer is 0.8 or less.