Multilayer Ceramic Capacitor Structure With Low-Resistance DC Bypass
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Solution Overview
Problem
Existing multilayer ceramic capacitors face challenges in balancing capacitance and direct current resistance, with limitations on increasing the number of signal internal electrodes and requiring individual design configurations for each capacitance value, which restricts product expandability.
Innovation Solution
A multilayer ceramic electronic component with a conductor portion connected to the capacitor, allowing direct current to flow through the conductor portion with lower resistance and alternating current through the capacitor, reducing the need for redesigning the internal configuration for each capacitance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of signal internal electrodes is increased to reduce direct current resistance, then direct current resistance decreases, but the capacitance increases and the device size constraint is violated
Solution Approach 1:
The invention divides the current path into two separate routes: a low-resistance conductor portion for direct current and the capacitor for alternating current. This segmentation allows DC to bypass the capacitor's internal electrodes entirely, eliminating the need to increase electrode quantity while maintaining low DC resistance.
Solution Approach 2:
The conductor portion acts as an intermediary element that provides a dedicated low-resistance path for direct current. This intermediary structure resolves the contradiction by handling DC current externally, allowing the capacitor to focus on its primary function without compromising DC resistance.
2Power
If the number of signal internal electrodes is increased to accommodate larger current, then current capacity increases, but the device complexity and design customization increase
Solution Approach 1:
The conductor portion serves as a universal solution that can be applied to capacitors of various capacitance values without requiring redesign of the capacitor's internal electrode configuration. This multi-functional approach handles both DC current conduction and maintains the capacitor's filtering function across different product specifications.
Solution Approach 2:
By introducing the conductor portion as an intermediary, the invention eliminates the need to customize internal electrode configurations for different current capacities. The same conductor design can be used across product lines, reducing design complexity while maintaining high current capacity.
3Reliability
If a separate conductor portion is added to provide low direct current resistance path, then direct current resistance decreases, but the device structure becomes more complex
Solution Approach 1:
The conductor portion is electrically connected to both terminals of the capacitor, merging the DC conduction function with the existing capacitor structure. This combination creates a unified component that handles both DC and AC currents efficiently without requiring completely separate systems.
Solution Approach 2:
The conductor portion is designed to work universally with the capacitor across different capacitance values and applications. This standardized approach reduces overall system complexity by using a consistent design pattern rather than custom solutions for each application.
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 configuration effectively reduces or prevents increases in capacitance and direct current resistance, enabling larger current accommodation without redesigning the internal structure, while maintaining low ESL and minimizing stress during reflow processes.
Implementation Method 1
a conductor portion electrically connected to the first end surface external electrode and the second end surface external electrode. The conductor portion includes a first connection region on one of surfaces of the conductor portion opposed to each other in the lamination direction
Implementation Method 2
The first connection region is connected to the first end surface external electrode by an electrically conductive adhesive
Implementation Method 3
a multilayer ceramic capacitor including a multilayer body. The multilayer body includes a first main surface and a second main surface opposed to each other in a lamination direction
Implementation Method 4
A direct current resistance RdcA of the conductor portion is smaller than a direct current resistance RdcB of the multilayer ceramic capacitor
Data Source
AI summary
A multilayer ceramic electronic component includes a multilayer ceramic capacitor, and a conductor portion. The multilayer ceramic capacitor includes first- and second-end-surface external electrodes extending around to first and second main surfaces respectively from first and second end surfaces, first- and second-side-surface external electrodes respectively on first and second side surfaces. The conductor portion is electrically connected to the first- and second-end-surface external electrodes, and includes first and second connection regions respectively on a multilayer ceramic capacitor side and a first end surface side, and on a conductor portion side and a second end surface side. The first connection region and the first-end-surface external electrode are connected by a conductive adhesive. A DC resistance of the conductor portion is smaller than a DC resistance of the multilayer ceramic capacitor.