Multilayer Ceramic Component Coating for Moisture-Resistant Electrode Sealing
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Solution Overview
Problem
Multilayer ceramic capacitors face challenges in maintaining moisture resistance and mechanical strength, particularly with the adhesion and thinning of margin portions, which complicates the process and affects reliability and electrode connections.
Innovation Solution
A multilayer ceramic electronic component design featuring a body with a dielectric layer, internal and external electrodes, and a coating layer on all surfaces, where the internal electrodes are connected to external electrodes through connection portions, enhancing moisture resistance and mechanical strength by preventing moisture intrusion and physical damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a separate margin portion is attached in the width direction of the internal electrode to maximize effective volume, then the capacity is improved, but the process complexity increases and moisture resistance reliability deteriorates
Solution Approach 1:
The patent merges the margin portion function with the external electrode by making the external electrode extend beyond the dielectric layer boundaries to form an integrated structure. This eliminates the need for separate margin portions while achieving the same volume maximization effect, thereby simplifying the manufacturing process and improving reliability.
Solution Approach 2:
The external electrode serves multiple functions: it provides electrical connection, acts as a margin portion for volume maximization, and forms a protective sealing structure. This multi-functionality eliminates the need for dedicated margin portions while achieving capacity improvement through effective volume maximization.
2Quantity of substance
If a separate margin portion is attached in the width direction of the internal electrode to maximize effective volume, then the capacity is improved, but the adhesion and thinning of the margin portion occur, deteriorating moisture resistance reliability
Solution Approach 1:
The patent merges the margin portion function with the external electrode by making the external electrode extend beyond the dielectric layer boundaries to form an integrated structure. This eliminates the need for separate margin portions while achieving the same volume maximization effect, thereby simplifying the manufacturing process and improving reliability.
Solution Approach 2:
The patent introduces a sealing structure formed by the extended external electrode that acts as an intermediary barrier between the internal electrode and the external environment. This sealing structure prevents moisture intrusion without requiring separate margin portions, thereby improving moisture resistance reliability.
3Reliability
If the internal electrode is fully exposed to connect with the external electrode, then the electrode connection is improved, but the mechanical strength and moisture resistance are deteriorated
Solution Approach 1:
The patent extends the external electrode in the width direction beyond the dielectric layer boundaries, creating a three-dimensional sealing structure. This dimensional extension allows the external electrode to simultaneously provide electrical connection and mechanical protection, solving the contradiction between connection reliability and structural strength.
Solution Approach 2:
The patent introduces a sealing structure formed by the extended external electrode that acts as an intermediary barrier between the internal electrode and the external environment. This sealing structure prevents moisture intrusion without requiring separate margin portions, thereby improving moisture resistance reliability.
4Reliability
If a coating layer is applied on all surfaces including margins to prevent moisture intrusion, then the moisture resistance is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent merges the sealing function with the external electrode structure itself by extending the external electrode beyond the dielectric layer boundaries. This integration eliminates the need for separate coating layers on margin portions, thereby maintaining moisture resistance while simplifying the manufacturing process.
Solution Approach 2:
The extended external electrode serves multiple functions including electrical connection, sealing, and structural protection. This multi-functionality eliminates the need for additional coating layers on margin portions, thereby maintaining moisture resistance while simplifying the manufacturing process.
Data Source
AI summary
A multilayer ceramic electronic component includes a body including a dielectric layer, first and second internal electrodes, a stacked portion including first and second surfaces opposing each other in a stacking direction of the first and second internal electrodes, third and fourth surfaces connected to the first and second surfaces and opposing each other, and fifth and sixth surfaces connected to the first and second surfaces, connected to the third and fourth surfaces, and opposing each other, and a coating layer disposed on the first to sixth surfaces of the stacked portion and having first and second connection portions; and first and second external electrodes connected to the first and second internal electrodes, respectively, and arranged on the third and fourth surfaces of the body, wherein the first and second internal electrodes are respectively connected to the first and second external electrodes through the first and second connection portions.