Multilayer Capacitor Array ESR Regulation via Outer Connecting Conductors
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Solution Overview
Problem
Multilayer capacitors face a contradiction between increasing capacity and equivalent series resistance (ESR), as higher capacity requires more dielectric layers and inner electrodes, which decreases ESR due to increased lead conductors connected in parallel.
Innovation Solution
The multilayer capacitor array adjusts ESR by connecting only a part of the inner electrodes to terminal conductors through lead conductors, allowing for regulation of ESR while maintaining constant dielectric layers and inner electrodes, and positions these electrodes to oppose each other with dielectric layers in between for increased capacitance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of laminated dielectric layers and inner electrodes is increased to attain greater capacity, then the capacity is improved, but the equivalent series resistance becomes smaller due to increased lead conductors connected in parallel
Solution Approach 1:
The patent segments the connection paths by introducing outer connecting conductors that connect multiple inner electrodes together before connecting to terminal conductors. This segmentation reduces the number of direct parallel paths from terminal conductors to inner electrodes, thereby increasing the equivalent series resistance while maintaining the same number of capacitive elements for high capacity.
Solution Approach 2:
The outer connecting conductors act as intermediary elements between the inner electrodes and terminal conductors. These intermediaries create additional series resistance paths by requiring current to flow through the outer connecting conductors before reaching the terminal conductors, thus increasing the overall equivalent series resistance without changing the capacity-determining inner electrode structure.
2Quantity of substance
If all inner electrodes are connected to terminal conductors through lead conductors, then the capacity is maximized, but the equivalent series resistance decreases due to multiple parallel connection paths
Solution Approach 1:
The patent merges multiple inner electrodes together through outer connecting conductors, creating combined connection groups. This merging reduces the total number of separate connection paths to terminal conductors, thereby increasing equivalent series resistance while maintaining all inner electrodes' contribution to capacity through the merged connection structure.
3Quantity of substance
If the number of lead conductors connected to terminal conductors is increased, then the capacity increases, but the equivalent series resistance further decreases due to more parallel resistance components
Solution Approach 1:
The patent segments the direct connection between inner electrodes and terminal conductors by introducing outer connecting conductors as intermediate connection points. This segmentation creates series resistance paths through the outer connecting conductors, increasing the overall equivalent series resistance while maintaining the same number of capacitive elements for high capacity.
Solution Approach 2:
The outer connecting conductors serve as intermediary elements that mediate the connection between inner electrodes and terminal conductors. By introducing these intermediaries, the patent creates additional series resistance in the current path, thereby increasing equivalent series resistance without reducing the number of capacitive elements that determine capacity.
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 allows for the regulation of ESR to a desirable value, enabling higher capacitance while preventing impedance drops at resonance frequencies, thus increasing bandwidth.
Implementation Method 1
a multilayer body having a plurality of dielectric layers laminated, and a plurality of outer conductors formed on the multilayer body... at least one first inner electrode in the plurality of first inner electrodes and at least one second inner electrode in the plurality of second inner electrodes are positioned so as to oppose each other with at least one dielectric layer in between
Implementation Method 2
each of the first inner electrodes is electrically connected to the first outer connecting conductor through a lead conductor... each of the second inner electrodes is electrically connected to the second outer connecting conductor through a lead conductor... the equivalent series resistance can be adjusted to a desirable value if inner electrodes are connected to outer connecting conductors formed on a surface of a multilayer body while the number of lead conductors can be changed
Data Source
AI summary
A multilayer capacitor array comprises a multilayer body, and first to fourth terminal conductors and first and second outer connecting conductors formed on the multilayer body. The multilayer body includes a first electrode group having a plurality of first and second inner electrodes, and a second electrode group having a plurality of third and fourth inner electrodes. The first to fourth inner electrodes are connected to the first to fourth terminal conductors, respectively. In the plurality of first inner electrodes, at least one first inner electrode whose number is smaller than the total number of the first inner electrodes by at least one is connected to the first terminal conductor. In the plurality of second inner electrodes, at least one second inner electrode whose number is smaller than the total number of the second inner electrodes by at least one is connected to the second terminal conductor.