Multilayer Ceramic Component Self-Alignment Electrodes
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Solution Overview
Problem
The challenge in mounting multilayer ceramic electronic components, such as capacitors, on substrates is achieving high accuracy due to limited mounter precision, necessitating an effective self-alignment method to accommodate miniaturization and dense packing.
Innovation Solution
A multilayer ceramic electronic component design featuring a multilayer body with specific dimensions and surface electrode configurations, including nickel-plated and tin-plated layers, to enhance self-alignment during mounting, with surface roughness of the nickel-plated layers between 3 μm and 6 μm, facilitating improved alignment and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multilayer ceramic electronic components are miniaturized to achieve dense mounting, then the productivity and space utilization are improved, but the arrangement accuracy deteriorates due to limited mounter precision
Solution Approach 1:
The component structure itself provides the alignment function through its electrode configuration. The outer electrodes extend beyond the component body to form overlapping regions with adjacent components, creating a self-aligning structure that automatically compensates for mounting position deviations without requiring external alignment mechanisms or higher precision equipment.
Solution Approach 2:
The electrode structure is divided into distinct functional zones: the inner electrode region for electrical connection and the extended outer electrode region for alignment. This segmentation allows the alignment function to be separated from the component body, enabling the self-alignment effect to operate independently of the mounting precision.
2Productivity
If the component size is reduced to increase mounting density, then the productivity is improved, but the reliability of electrical connection deteriorates
Solution Approach 1:
The electrode connections extend into the lateral dimension beyond the component boundaries, creating overlapping connection regions with adjacent components. This dimensional extension provides redundant connection paths and increases the effective connection area, compensating for the reduced component size and maintaining connection reliability despite miniaturization.
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 proposed design significantly improves the arrangement accuracy of multilayer ceramic electronic components by leveraging the self-alignment effect, enabling denser and more precise mounting on substrates, as demonstrated by the surface roughness of the nickel-plated layers influencing the self-alignment mechanism.
Implementation Method 1
The nickel-plated layer in each of the first outer electrode and the second outer electrode has surface roughness of no less than about 3 μm and no more than about 6 μm, for example. The arrangement accuracy in mounting the multilayer ceramic electronic component is improved by effective use of the self-alignment effect.
Data Source
AI summary
A multilayer ceramic electronic component has a dimension in a longitudinal direction of no less than about 0.12 mm and no more than about 0.27 mm, a dimension in a width direction of no less than about 0.06 mm and no more than about 0.14 mm, and a dimension in a lamination direction of no less than about 0.06 mm and no more than about 0.14 mm, for example. Each of a first outer electrode and a second outer electrode includes an underlying electrode layer disposed on a surface of a multilayer body, a nickel-plated layer covering the underlying electrode layer, and a tin-plated layer covering the nickel-plated layer. The nickel-plated layer in each of the first outer electrode and second outer electrode has surface roughness of no less than about 3 μm and no more than about 6 μm, for example.