Graphene Oxide Coating for Moisture-Resistant Multilayer Components
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Solution Overview
Problem
As multilayer electronic components, such as ceramic capacitors, undergo miniaturization and increase in capacitance, the challenge of improving moisture resistance reliability becomes critical due to increased diversity in external moisture penetration paths, particularly as the thickness of protective cover and side margin portions decreases.
Innovation Solution
A multilayer electronic component is developed with a graphene oxide layer coating on its external surface, which includes a dielectric layer and internal electrodes, to enhance moisture resistance by forming a barrier against external moisture penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of stacks is increased to manufacture high-capacitance multilayer electronic components, then the capacitance is improved, but the moisture resistance reliability deteriorates due to increased external moisture penetration paths
Solution Approach 1:
A coating film comprising a graphene oxide layer is formed on the external surface of the multilayer electronic component. This thin film acts as a flexible barrier that effectively blocks external moisture penetration paths without interfering with the internal electrode structure or capacitance performance, thereby resolving the contradiction between high capacitance and moisture resistance reliability.
2Volume of moving object
If the thickness of cover portion or side margin portion is decreased, then the component size is reduced, but the moisture resistance reliability deteriorates due to increased external moisture penetration paths
Solution Approach 1:
The coating film with graphene oxide layer provides a moisture barrier function that compensates for the reduced thickness of cover and side margin portions. This allows the component to maintain small size while achieving improved moisture resistance reliability through the protective thin film on the external surface.
Solution Approach 2:
The combination of the coating film comprising graphene oxide layer with the ceramic body material creates a composite structure that enhances moisture resistance. The graphene oxide layer in the coating film provides superior barrier properties that protect the internal electrodes even when the traditional protective margins are minimized.
3Reliability
If a coating film is formed on the external surface, then the moisture resistance reliability is improved, but the device complexity increases
Solution Approach 1:
The coating film is formed by controlling the concentration of graphene oxide in the solution (0.01 mg/mL to 0.50 mg/mL) and adjusting spray conditions to achieve optimal coating thickness. By optimizing these parameters, the coating provides effective moisture protection while maintaining a simple single-layer structure that does not significantly increase device complexity.
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 graphene oxide layer effectively reduces external moisture penetration, thereby improving the moisture resistance reliability of the component, even as the component size decreases and capacitance increases.
Implementation Method 1
the coating film is disposed to contact at least a portion of the dielectric layer and includes a graphene oxide layer
Data Source
AI summary
A multilayer electronic component includes a body including a dielectric layer and internal electrodes, external electrodes disposed on the body, and a coating film disposed on at least a portion of an external surface of the body, wherein the coating film is disposed to contact at least a portion of the dielectric layer and includes a graphene oxide layer.