Electronic Component Insulating Layer Prevents Solder Bridging
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Solution Overview
Problem
Conventional surface mounting methods for electronic components, such as multilayer ceramic capacitors, face challenges in achieving high-density mounting due to solder bridges and short-circuiting issues between adjacent components, especially when positional deviations occur during mounting.
Innovation Solution
The electronic component design features an outer electrode with an insulating layer covering parts of the main and side faces, preventing solder from wetting these areas and thus eliminating solder fillets and potential short-circuits, allowing for closer adjacency without bridging or short-circuiting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If outer electrodes are formed on all five surfaces (end faces and side faces) of the element body, then the electrical connectivity and current path are improved, but solder bridges form on side faces causing short-circuiting between adjacent components
Solution Approach 1:
The patent applies different properties to different parts of the outer electrode: the end face portions remain conductive for electrical connection, while the side face portions are covered with insulating material to prevent solder bridging. This local differentiation resolves the contradiction by maintaining electrical connectivity where needed while eliminating harmful solder bridges on side faces.
2Productivity
If electronic components are mounted closely adjacent to each other for high-density mounting, then the mounting density is improved, but the risk of solder bridges and short-circuiting between adjacent components increases
Solution Approach 1:
The patent applies insulating material to the side faces of outer electrodes in advance, before the soldering process. This preliminary protective action prevents solder from forming bridges on side faces, enabling high-density mounting without increasing the risk of short-circuiting between adjacent components.
3Object-affected harmful factors
If insulating material is applied to side faces of outer electrodes, then solder bridging is prevented, but the manufacturing process complexity increases
Solution Approach 1:
The patent combines the insulating material application with the existing outer electrode formation process. The insulating material is applied during the same manufacturing sequence as the outer electrode formation, merging two operations into one integrated process flow, thereby minimizing the increase in manufacturing 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
This design enables high-density mounting of electronic components without solder fillets or short-circuiting, even when components are closely packed or experience positional deviations, enhancing reliability and manufacturing efficiency.
Implementation Method 1
Since solder wets only metals, the insulating layer functions as a solder resist layer. Therefore, when the electronic component of the present invention is mounted to a substrate, solder does not wet the portion of the outer electrode covered with the insulating layer
Data Source
AI summary
An electronic component comprises an element body and an outer electrode. The element body has a pair of end faces opposing each other, a pair of main faces opposing each other while extending so as to connect the pair of end faces to each other, and a pair of side faces opposing each other while extending so as to connect the pair of main faces to each other. The outer electrode is formed on the end face side of the element body and covers a portion of the main and side faces adjacent to the end face. At least a surface of an electrode portion of the outer electrode located on the side face side thereof is covered with an insulating layer.