Capacitor External Electrode Extended Pattern Design
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Solution Overview
Problem
Multilayer ceramic capacitors face limitations in increasing capacitance due to challenges in enhancing the dielectric constant of materials and reducing dielectric layer thickness, while also facing issues with short-circuiting between external electrodes.
Innovation Solution
The design includes dielectric layers and internal electrodes alternately stacked with connection electrodes that extend perpendicular to the dielectric layers, forming extended patterns and connection patterns to connect to external electrodes, minimizing the current path and preventing short-circuits by optimizing the arrangement and spacing of these electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of stacked layers is increased to achieve high capacitance, then capacitance is improved, but the risk of short-circuit between external electrodes increases
Solution Approach 1:
The patent introduces connection patterns that extend in the third direction (perpendicular to the stacking direction) from the extended patterns on the surface. This dimensional extension creates additional current paths and increases the distance between external electrodes, effectively preventing short-circuits while maintaining high capacitance through increased stacked layers.
Solution Approach 2:
The connection patterns act as intermediary structures between the external electrodes and the internal electrodes. By extending the connection patterns in the third direction and spacing them apart, the patent creates an intermediate path that prevents direct contact between external electrodes, thereby mediating the short-circuit risk while preserving capacitance.
2Quantity of substance
If the dielectric layer thickness is reduced to increase capacitance, then capacitance is improved, but manufacturing precision requirements increase
Solution Approach 1:
Instead of relying solely on reducing dielectric layer thickness, the patent extends the connection patterns in the third direction (perpendicular to stacking). This dimensional change allows capacitance to be increased through more stacked layers without requiring extremely precise control of individual layer thickness, as the extended connection patterns provide additional electrical path length.
3Strength
If the extended patterns are positioned closer to increase adhesion, then adhesion is improved, but short-circuit risk increases
Solution Approach 1:
The patent applies different spatial characteristics to different parts of the connection patterns. The extended patterns are positioned at specific locations (e.g., at least at one end in the first direction) to maximize adhesion locally, while the connection patterns extend in the third direction to maintain adequate spacing and prevent short-circuits. This local differentiation of quality allows simultaneous optimization of adhesion and short-circuit prevention.
Data Source
AI summary
A capacitor component includes: a body including first and second internal electrodes alternately disposed in a first direction; first and second connection electrodes extending in the first direction in the body, respectively connected to the first and second internal electrodes, and opposing each other in a second direction; and first and second external electrodes disposed on one surface of the body and respectively connected to the first and second connection electrodes and each include an extended pattern disposed at one end portion on the one surface in the second direction and extending in a third direction, and a connection pattern extending, in the second direction, from a region spaced apart from both ends of the extended pattern in the third direction and connected to one of the first and second connection electrodes in a region spaced apart from opposite ends of the extended pattern in the third direction.