Multilayer Capacitor Side Electrodes Without Overlap Loss
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Solution Overview
Problem
The existing multilayer ceramic capacitors face a reduction in effective electrostatic capacity due to the decrease in the overlapping region of signal and ground inner electrodes, which is caused by the extension of ground inner electrodes to the side surfaces, leading to a smaller effective region in the stacking direction.
Innovation Solution
The solution involves a multilayer body with outer electrodes located on the side surfaces, directly connected to the inner electrodes at positions spaced away from the side surfaces, allowing for an enlarged effective overlap region without the need for inner electrode extensions, thereby increasing the electrostatic capacity and improving component characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If ground inner electrodes are extended to the side surfaces of the multilayer body, then the outer electrodes can be connected to the inner electrodes, but the effective region in which signal inner electrode and ground inner electrode overlap in the stacking direction decreases
Solution Approach 1:
The patent changes the connection approach from lateral extension (width direction) to vertical penetration (stacking direction). Outer electrodes are formed to penetrate through the multilayer body in the stacking direction, establishing electrical connection with inner electrodes via the thickness dimension rather than through side surface extension. This dimensional shift preserves the effective overlap area while achieving electrode connectivity.
Solution Approach 2:
Instead of extending inner electrodes outward to connect with outer electrodes on side surfaces, the patent inverts the approach by having outer electrodes penetrate inward through the multilayer body to connect with inner electrodes. This reversal of connection direction eliminates the need for inner electrode extension and maintains maximum overlap region.
2Reliability
If ground inner electrodes are extended to the side surfaces, then electrical connection is achieved, but the electrostatic capacity decreases
Solution Approach 1:
The patent achieves electrical connection through vertical penetration in the stacking direction rather than lateral extension in the width direction. This allows the inner electrodes to maintain their full lateral dimensions for capacitance generation while outer electrodes establish connectivity through the thickness dimension, thereby preserving electrostatic capacity.
Solution Approach 2:
The patent applies different structural characteristics to different regions: inner electrodes maintain extended lateral dimensions for maximum overlap and capacitance, while outer electrodes are designed with vertical penetration characteristics for connection purposes. This localized differentiation allows each component to optimize its function without compromising the other.
3Reliability
If inner electrodes are extended to side surfaces for connection, then electrode connectivity is achieved, but the size of the capacitor increases
Solution Approach 1:
Instead of extending inner electrodes outward to side surfaces (increasing lateral dimensions and overall size), the patent inverts the approach by having outer electrodes penetrate inward through the multilayer body. This maintains compact lateral dimensions while achieving connectivity through the thickness direction, thereby minimizing capacitor size.
Solution Approach 2:
The patent shifts the connection strategy from lateral dimension extension to vertical dimension utilization. By forming outer electrodes that penetrate through the stacking direction, connectivity is achieved without increasing the lateral footprint or overall volume of the capacitor, enabling miniaturization.
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 enhances the electrostatic capacity and reduces the size of the capacitor, while also improving humidity resistance and preventing water ingress, by allowing for a larger overlap region between inner electrodes without protrusions, thus increasing the effective capacity per volume and reducing ESL.
Implementation Method 1
a multilayer body in which a plurality of inner electrodes and a plurality of dielectric layers are alternately stacked
Implementation Method 2
an electrostatic capacity decreases accordingly
Data Source
AI summary
An electronic component includes a multilayer body including inner electrodes and dielectric layers that are alternately stacked, and outer electrodes that are electrically connected to the inner electrodes. The multilayer body includes first and second main surfaces opposite each other in a stacking direction, first and second side surfaces opposite each other in a width direction, and first and second end surfaces opposite each other in a length direction. At least one of the outer electrodes is located on at least one of the first side surface or the second side surface of the multilayer body and is directly connected to the inner electrodes at positions spaced away from the at least one of the first side surface or the second side surface toward the inside of the multilayer body.