Ceramic Electronic Component Moisture Resistance via Resin Layers
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Solution Overview
Problem
Multilayer ceramic capacitors face challenges in achieving miniaturization and high capacity while maintaining moisture resistance reliability, as reducing thicknesses leads to degradation in moisture resistance.
Innovation Solution
Incorporating resin layers between the band portions of external electrodes and the body, with specific lengths ranging from 3 μm to 200 μm, to block moisture penetration routes and enhance moisture resistance reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If thicknesses of dielectric layer and internal electrode are reduced to achieve miniaturization and high capacity, then capacity and size are improved, but moisture resistance reliability deteriorates
Solution Approach 1:
A resin layer is introduced as an intermediary substance between the external electrode and the ceramic body. This resin layer fills the gap and prevents moisture from penetrating into the internal structure, thereby protecting the thin dielectric layer and internal electrodes from moisture damage while maintaining the miniaturized design
Solution Approach 2:
A thin resin coating is applied to the surface of the external electrode, forming a flexible protective barrier. This thin film structure effectively blocks moisture penetration routes without adding significant thickness, allowing the component to maintain its miniaturized form while achieving high moisture resistance reliability
2Quantity of substance
If thicknesses of margin portion, cover portion, and external electrode are reduced to secure maximum valid capacity, then capacity is improved, but moisture resistance reliability deteriorates
Solution Approach 1:
The resin layer serves as a mediator between the reduced-thickness external electrode and the ceramic body, compensating for the reduced protective margins by providing an additional moisture barrier that enables maximum valid capacity to be achieved without sacrificing reliability
Data Source
AI summary
A ceramic electronic component includes a body including a dielectric layer and first and second internal electrodes disposed to oppose each other with the dielectric layer interposed therebetween, first and second external electrodes each including a connection portion disposed on a side surface of the body and a band portion extending from the connection portion to portions of upper/lower and front/rear surfaces of the body, first and second resin layers each disposed between the band portion and the body and extending from an end of the band portion towards each side surface by a predetermined length, in which the predetermined length is within a range of 3 μm to 200 μm.