Three-Terminal MLCC Electrode Layout for Lower DC Resistance
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Solution Overview
Problem
The existing three-terminal multilayer ceramic capacitors face challenges in reducing or preventing heat generation due to limited junction areas between inner electrode layers and outer electrodes, leading to high DC resistance.
Innovation Solution
The proposed solution involves a three-terminal multilayer ceramic capacitor design with extended electrode portions that increase the junction area between the first inner electrode layer and the outer electrodes, reducing DC resistance and heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the junction area between inner electrode layers and outer electrodes is limited, then the device complexity is reduced, but the DC resistance increases and heat generation occurs
Solution Approach 1:
The patent extends the first inner electrode layer in the length direction beyond the conventional end surfaces to create extended electrode portions. This dimensional extension increases the junction area with outer electrodes without complicating the basic layered structure, thereby reducing DC resistance while maintaining structural simplicity
Solution Approach 2:
The extended electrode portions of the first inner electrode layer are merged with the outer electrodes to form a larger junction area. This merging of electrode surfaces increases the effective contact area, reducing contact resistance and heat generation without requiring additional separate components
2Reliability
If the junction area between inner electrode layers and outer electrodes is increased, then the DC resistance is reduced, but the device complexity increases
Solution Approach 1:
The patent applies local quality by extending only the first inner electrode layer in the length direction to create extended electrode portions, while the second inner electrode layer remains conventional. This localized modification increases junction area and reduces heat generation at critical interfaces without requiring complex changes to the entire electrode structure
3Manufacturing precision
If the inner electrode layers extend to end surfaces only, then the manufacturing precision is maintained, but the junction area is limited
Solution Approach 1:
The patent extends the first inner electrode layer beyond the conventional end surfaces in the length direction, utilizing the dimensional space available in the capacitor structure. This extension increases the junction area with outer electrodes while maintaining alignment precision through the continuous layered manufacturing process
Data Source
AI summary
A three-terminal multilayer ceramic capacitor includes first to sixth extended electrode portions. The first and second extended electrode portions are connected to a first outer electrode at different portions of a first end surface. The third extended electrode portion is connected to the first outer electrode at a position spaced away from the first end surface on a second side surface. The fourth extended electrode portion is connected to a second outer electrode on a second end surface. The fifth extended electrode portion is connected to the second outer electrode at a position spaced away from the second end surface on the first side surface. The sixth extended electrode portion is connected to the second outer electrode at a position spaced away from the second end surface on the second side surface.