Ceramic Electronic Component Resin Electrode Moisture Control
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Solution Overview
Problem
Monolithic ceramic electronic components face damage from external stress and are prone to cracking in harsh environments, and their outer electrodes are susceptible to damage during reflow-mounting processes due to moisture expansion.
Innovation Solution
A ceramic electronic component design featuring outer electrodes with a baked electrode layer, a resin electrode layer containing a conductive material and epoxy resin, and a plating layer, where the resin electrode layer has a controlled moisture content of 0.0015% to 0.005% mass, and a specific area ratio of conductive material to resin, providing flexibility and protection against physical shock and thermal stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a resin electrode layer is used to buffer external stress and prevent ceramic body cracking, then the ceramic body is protected from cracking, but the outer electrode becomes susceptible to damage during reflow-mounting processes
Solution Approach 1:
The patent applies parameter changes by precisely controlling the moisture content of the resin electrode layer to 0.0015 mass% or greater and 0.005 mass% or less. This specific moisture parameter range optimizes the resin's mechanical properties, providing sufficient flexibility to buffer external stress and prevent ceramic cracking while maintaining enough integrity to resist damage during reflow-mounting processes.
Solution Approach 2:
The patent uses composite materials by combining the resin electrode layer with the ceramic body and metal electrodes. The resin electrode layer acts as a composite material that integrates the stress-buffering function with the electrical connection function, creating a multi-functional outer electrode structure that protects both the ceramic body and maintains reliability during manufacturing.
2Strength
If the resin electrode layer has high flexibility to buffer stress, then crack resistance improves, but manufacturing precision becomes difficult to control
Solution Approach 1:
The patent establishes specific parameter ranges for moisture content (0.0015 mass% to 0.005 mass%) that balance the competing requirements. Within this range, the resin maintains sufficient flexibility for stress buffering while remaining manageable for precise manufacturing control, resolving the contradiction between mechanical performance and manufacturing precision.
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 design effectively prevents cracking of the ceramic component and reduces the risk of outer electrode damage during reflow processes, maintaining a strong bond with the mounting board and enhancing durability against environmental stresses.
Implementation Method 1
the resin electrode layer buffers external stress applied to a ceramic body
Implementation Method 2
a resin electrode layer including a conductive material and a resin
Data Source
AI summary
A ceramic electronic component includes a ceramic body and first and second outer electrodes. The first and second outer electrodes are located on the ceramic body. The first outer electrode includes a first resin electrode layer, and the second outer electrode includes a second resin electrode layer. Each of the resin electrode layers includes a conductive material and a resin. The moisture content of the resin electrode layers is about 0.005 mass % or less.