Ceramic Electronic Component Plating Charge Control
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Solution Overview
Problem
The variation in plating growth dimension of external electrodes in ceramic electronic components manufactured by electrolytic plating leads to inconsistencies in product characteristics and defective appearances across different product lots, as the conventional methods fail to accurately predict and control this dimension effectively.
Innovation Solution
A method that involves measuring the surface resistance value of ceramic bodies and determining the appropriate charge amount for electrolytic plating based on a pre-grasped correlation between surface resistance, charge amount, and intended plating growth dimension, ensuring consistent plating growth dimensions across multiple ceramic bodies within the same product lot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed charge amount is applied for electrolytic plating across all product lots, then the plating process is simple and efficient, but the plating growth dimension varies between product lots leading to inconsistent product characteristics
Solution Approach 1:
The patent changes the parameter of charge amount from a fixed value to a variable value determined by surface resistance measurement. By measuring the surface resistance of each ceramic body and calculating the charge amount based on the relationship Q=k×R×t, the plating growth dimension is controlled precisely for each product, eliminating variation between product lots while maintaining process efficiency.
2Manufacturing precision
If the charge amount is adjusted for each product lot to control plating growth dimension, then manufacturing precision improves, but the process complexity increases due to additional measurement and calculation steps
Solution Approach 1:
The patent employs a self-service approach where the ceramic body itself provides the information needed for process control through surface resistance measurement. The measured surface resistance directly determines the charge amount, creating a self-regulating system that automatically adapts to variations in ceramic body properties without requiring complex external control mechanisms.
Solution Approach 2:
The patent implements a feedback mechanism where the surface resistance of each ceramic body is measured, and this measurement feeds back into the charge amount calculation for electrolytic plating. This closed-loop control ensures that the plating growth dimension is precisely controlled based on actual product characteristics, maintaining high manufacturing precision.
3Manufacturing precision
If surface resistance measurement and individual charge amount determination are performed for each ceramic body, then plating growth dimension consistency is achieved, but manufacturing time and cost increase
Solution Approach 1:
The patent performs surface resistance measurement before the electrolytic plating process, allowing the charge amount to be predetermined based on the measured resistance. This preliminary action enables efficient batch processing where multiple ceramic bodies can be measured and prepared for plating in sequence, reducing overall manufacturing time while maintaining 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
This approach significantly reduces the variation in plating growth dimension, thereby minimizing defects and ensuring consistent product characteristics by applying the same charge amount to all ceramic bodies within a product lot, enhancing manufacturing efficiency and reducing defective appearances.
Implementation Method 1
at least a part of an external electrode is provided by a plated film formed by electrolytic plating
Data Source
AI summary
The variation between different product lots is reduced for plating growth dimensions of plated films to serve as external electrodes. The correlation is grasped in advance among the surface resistance value of a ceramic body, the applying charge amount for electrolytic plating, an actual plating growth dimension obtained when the ceramic body with the surface resistance value is subjected to plating with the foregoing applying charge amount. The surface resistance value is measured for the ceramic body on which plated films to serve as external electrodes are to be formed by applying electrolytic plating, and the applying charge amount required for plating is determined by applying the surface resistance value and a designed value for an intended plating growth dimension to the correlation mentioned above. Thereafter, in order to form the plated films, the ceramic body is subjected to electrolytic plating, with the applying charge amount determined.