Multilayer Capacitor Electrode Curvature for Breakdown Voltage
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Solution Overview
Problem
The challenge is to develop a multilayer ceramic capacitor with reduced size and increased capacitance while maintaining reliability, as thinner internal electrodes can lead to short circuits, decreased capacitance, and lower breakdown voltage due to uneven thickness and smoothness issues.
Innovation Solution
The solution involves a multilayer electronic component design with alternately stacked dielectric layers and internal electrodes, where curved and flat electrodes are used in the capacitance forming portion, with controlled distances to ensure uniform thickness and smoothness, and a manufacturing method using coating offset printing to achieve uniform internal electrode patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the thickness of internal electrodes is decreased to reduce component size, then the component size is reduced, but the reliability deteriorates due to short circuits and decreased breakdown voltage
Solution Approach 1:
The patent applies local quality by differentiating the morphology of internal electrodes at different locations. The end portions of internal electrodes are designed with curved surfaces while the central portions maintain flat surfaces. This localized differentiation allows the curved end portions to prevent short circuits and improve reliability, while the flat central portions maintain adequate thickness for capacitance, thereby resolving the contradiction between miniaturization and reliability.
2Quantity of substance
If the thickness of internal electrodes is decreased to increase capacitance per unit volume, then the capacitance per unit volume increases, but the manufacturing precision deteriorates due to uneven thickness and smoothness
Solution Approach 1:
The patent implements local quality by specifying different surface characteristics for different regions of internal electrodes. The end portions are designed with curved surfaces to ensure proper spacing and prevent short circuits, while the central portions are designed with flat surfaces to maintain uniform thickness for optimal capacitance. This localized approach enables high manufacturing precision even when overall electrode thickness is reduced to increase capacitance density.
3Volume of moving object
If the thickness of internal electrodes is decreased to reduce component size, then the component size is reduced, but the breakdown voltage deteriorates
Solution Approach 1:
The patent applies local quality by designing curved surfaces at the end portions of internal electrodes while maintaining flat surfaces at the central portions. The curved end portions create larger spacing between adjacent electrodes, which prevents electrical breakdown and maintains high breakdown voltage. Meanwhile, the flat central portions maintain sufficient thickness for capacitance function. This localized differentiation allows component miniaturization while preserving breakdown voltage strength.
Data Source
AI summary
A multilayer electronic component includes: a body including a plurality of dielectric layers and a plurality of internal electrodes alternately disposed with the dielectric layers in a first direction, wherein when a space where the plurality of internal electrodes overlap each other in the first direction is defined as a capacitance forming portion, the plurality of internal electrodes include internal electrodes that are curved at end portions thereof in the capacitance forming portion and internal electrodes that are flat in the capacitance forming portion, and in a cross section of the body in the first and second directions.