Multilayer Ceramic Capacitor Side Electrode Design
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Solution Overview
Problem
The size of the effective region where signal inner electrodes and ground inner electrodes overlap in multilayer ceramic capacitors decreases due to ground inner electrode extensions to side surfaces, leading to a reduction in electrostatic capacity.
Innovation Solution
The design includes outer electrodes on side surfaces of the multilayer body that are directly connected to inner electrodes at positions spaced away from the side surfaces, eliminating the need for inner electrode extensions and allowing for an enlarged effective overlap region, with specific configurations and materials used to enhance connectivity and electrostatic capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If ground inner electrodes are extended to side surfaces of the multilayer body, then outer electrodes can be connected to inner electrodes, but the effective overlap region between signal and ground inner electrodes decreases
Solution Approach 1:
The patent changes the connection dimension from lateral extension (width direction) to vertical penetration (stacking direction). Outer electrodes connect to inner electrodes through the thickness of the multilayer body via through-holes, rather than requiring inner electrodes to extend to side surfaces. This dimensional shift preserves the full overlap area while achieving electrode connectivity.
Solution Approach 2:
The patent introduces through-holes as intermediary structures that facilitate electrical connection between outer electrodes and inner electrodes. These through-holes act as mediators, allowing current to pass through the multilayer body without requiring direct lateral contact between inner and outer electrodes, thus preserving the effective overlap region.
2Ease of manufacture
If inner electrodes are extended to side surfaces, then outer electrodes can be directly connected, but the electrostatic capacity decreases
Solution Approach 1:
The invention transitions from horizontal electrode connection (extending to side surfaces) to vertical connection (through the multilayer body). This allows the inner electrodes to maintain their full lateral dimensions for maximum capacitance while outer electrodes access them through the thickness via through-holes.
Solution Approach 2:
The patent applies different structural qualities to different regions: the inner electrodes maintain uniform lateral dimensions throughout their length for maximum overlap and capacitance, while localized through-holes are created only where needed for outer electrode connection, preserving the overall electrostatic capacity.
3Ease of operation
If outer electrodes are placed on end surfaces, then connectivity is achieved, but humidity resistance and water entry prevention are compromised
Solution Approach 1:
The patent uses dielectric layers as intermediary barriers between the conductive through-holes and the external environment. These dielectric layers fill the through-holes and seal them, preventing moisture ingress while still allowing electrical connection between outer and inner electrodes through the sealed pathways.
Solution Approach 2:
The dielectric layers act as protective thin films that seal the through-holes containing the conductive pathways. These film-like dielectric structures provide environmental protection while maintaining the electrical connectivity function, preventing water and humidity from reaching the internal electrodes.
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.