Multilayer Capacitor Intermediate Electrode Crosstalk
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Solution Overview
Problem
Existing multilayer capacitors face challenges in achieving higher voltage resistance and preventing crosstalk between signal and ground terminals, particularly in noise reduction applications.
Innovation Solution
A multilayer capacitor design featuring a capacitor element body with laminated dielectric layers, signal and ground terminal electrodes, and an intermediate internal electrode that forms capacitors in series between signal and ground terminals, ensuring insulation and reduced crosstalk through a shared intermediate electrode, allowing for improved voltage resistance and compact size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional multilayer capacitor structure with separate capacitors for each signal line is used, then the voltage resistance can be improved, but the device complexity and size increase
Solution Approach 1:
The patent combines multiple capacitor functions into a single integrated structure. The first and second signal electrodes, along with the ground electrode, form multiple capacitors (first capacitor between first signal electrode and ground electrode, second capacitor between second signal electrode and ground electrode) within one multilayer capacitor body. This merging approach achieves the voltage resistance of separate capacitors while reducing overall device complexity and size.
Solution Approach 2:
The ground electrode serves multiple functions simultaneously: it acts as one electrode for the first capacitor and another electrode for the second capacitor. This multi-functionality allows the single ground electrode to provide voltage resistance protection for both signal lines, eliminating the need for separate ground electrodes for each capacitor and thereby reducing structural complexity.
2Strength
If separate ground electrodes are used for each capacitor, then the voltage resistance is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The patent merges the ground electrodes of the first and second capacitors into a single shared ground electrode. This consolidation reduces the number of electrode layers that need to be manufactured separately, simplifying the lamination and firing processes while maintaining the voltage resistance functionality for both signal lines.
Solution Approach 2:
The single ground electrode performs the grounding function for both the first and second capacitors, reducing manufacturing steps such as electrode patterning, lamination alignment, and firing operations. This multi-functional design decreases production complexity and cost while achieving the required voltage resistance.
3Reliability
If multiple separate capacitors are used to ensure insulation, then the reliability is improved, but the device size increases
Solution Approach 1:
The patent integrates multiple capacitor functions into a single compact multilayer structure. By sharing the ground electrode and using alternating signal and ground electrode layers, the design achieves reliable insulation between signal lines and ground while maintaining a small overall volume, as all capacitor elements are stacked within one device footprint.
Solution Approach 2:
The capacitor elements are nested within the multilayer structure, with signal electrodes and ground electrodes alternating in successive layers. The first signal electrode, second signal electrode, and ground electrode are arranged in a nested configuration where each electrode is surrounded by dielectric layers and shares space with other electrodes, maximizing space utilization and reducing device size while maintaining insulation reliability.
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
The design enhances voltage resistance and prevents crosstalk between signal and ground terminals, maintaining insulation even when one capacitor is broken, while allowing for a smaller and lower-profile capacitor structure.
Implementation Method 1
a first capacitor is constructed between the first signal line terminal and first ground terminal, and a second capacitor is constructed between the second signal line terminal and second ground terminal
Implementation Method 2
capacitor element body constituted by a plurality of laminated dielectric layers
Data Source
AI summary
A multilayer capacitor comprises a capacitor element body constituted by a plurality of laminated dielectric layers; first and second signal terminal electrodes and a ground terminal electrode which are arranged on an outer surface of the capacitor element body; and a ground electrode, first and second signal electrodes, and an intermediate internal electrode which are arranged within the capacitor element body. The first signal electrode is connected to the first signal terminal electrode, while the second signal electrode is connected to the second signal terminal electrode. The ground electrode is connected to the ground terminal electrode and has a first region overlapping the first signal electrode in a first direction in which the plurality of dielectric layers are laminated and a second region overlapping the second signal electrode in the first direction. The intermediate internal electrode is arranged such as to be separated from the first and second signal terminal electrodes and the ground terminal electrode and positioned between the first signal electrode and the ground electrode and between the second signal electrode and the ground electrode. The intermediate internal electrode has a region overlapping the first region in the first direction and a region overlapping the second region in the first direction.