Multilayer Capacitor Margin Structure for Moisture Blocking
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Solution Overview
Problem
Multilayer ceramic capacitors face issues with external moisture infiltration through the margin portion, leading to reduced reliability and mechanical strength, particularly due to the short path of moisture infiltration through the internal electrode, which affects their performance and durability in electronic devices.
Innovation Solution
Incorporating a protection region with metal particles in the margin portions of the multilayer electronic component, where the metal particles absorb and react with external moisture, preventing deep infiltration and enhancing mechanical strength by oxidizing and removing moisture, thereby improving the component's moisture resistance and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the dielectric layer and margin portion are adjusted to have different compositions to prevent moisture infiltration, then moisture resistance is improved, but process efficiency deteriorates due to requiring separate ceramic slurry injection or dielectric sheet attachment
Solution Approach 1:
The patent applies local quality by forming a protection region with different material composition (containing metal particles) only in specific locations (margin portions) where moisture infiltration occurs, rather than changing the entire dielectric layer composition. This localized approach prevents moisture infiltration at critical areas while maintaining process efficiency through integration with existing green sheet formation processes
2Device complexity
If the internal electrode is disposed outermost to reduce complexity, then manufacturing complexity is reduced, but reliability deteriorates due to short moisture infiltration path through the margin portion
Solution Approach 1:
The patent introduces an intermediary protection region containing metal particles between the external environment and the outermost internal electrode. This protection region acts as a mediator that blocks moisture infiltration paths, allowing the simple outermost electrode configuration to maintain both low complexity and high reliability
3Volume of moving object
If the component size is reduced to meet miniaturization requirements, then adaptability to small electronic devices is improved, but mechanical strength deteriorates making the component more susceptible to cracks from external impact
Solution Approach 1:
The patent uses composite materials by incorporating metal particles (such as nickel, copper, or aluminum) into the ceramic green sheet to form a protection region. This composite structure enhances mechanical strength and crack resistance in the miniaturized component while maintaining the reduced size required for modern electronic devices
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively prevents external moisture infiltration and enhances the mechanical strength of the multilayer electronic component, ensuring higher reliability and capacitance retention, even under external impacts, by using metal particles in the margin regions to absorb and oxidize moisture.
Implementation Method 1
the metal particles include metal particles having a flake shape... the metal particles absorb and react with external moisture, preventing deep infiltration and enhancing mechanical strength by oxidizing and removing moisture
Data Source
AI summary
A multilayer electronic component includes: a body including dielectric layers and a plurality of internal electrodes stacked on each other in a first direction, while having the dielectric layer interposed therebetween; margin portions disposed on opposite surfaces of the body in a second direction perpendicular to the first direction; and external electrodes disposed on opposite surfaces of the body in a third direction perpendicular to the first and second directions, and respectively connected to the internal electrodes, wherein the margin portion includes a protection region, in which a plurality of metal particles are disposed, in at least one of upper and lower portions thereof in the first direction.