Multilayer Capacitor Via Electrode Structure for Moisture and ESR
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional multilayer ceramic capacitors face issues with moisture and oxygen penetration due to direct contact between internal and external electrodes, leading to increased equivalent series resistance (ESR) and reduced reliability.
Innovation Solution
A multilayer electronic component design featuring a stack unit with internal electrodes and dielectric layers, connection electrodes with insulating layers, and via electrodes connecting to external electrodes, which minimizes moisture and oxygen ingress while enhancing ESR characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If one end of the internal electrode is in direct contact with the external electrode, then the structure is simple, but moisture and oxygen can penetrate easily leading to increased ESR and reduced reliability
Solution Approach 1:
The patent introduces an extension unit as an intermediary component between the internal electrode and external electrode. This extension unit includes an insulating layer that extends from the external electrode toward the internal electrode, creating a barrier that prevents moisture and oxygen penetration while maintaining electrical connection through via electrodes. The insulating layer acts as a mediator that blocks harmful substances without interrupting the electrical pathway.
Solution Approach 2:
The patent adds a new dimensional element by extending the insulating layer in a direction perpendicular to the stacking direction of internal electrodes. This creates a three-dimensional protective structure where the extension unit protrudes from the external electrode surface, forming a barrier in an additional spatial dimension that blocks moisture and oxygen pathways without affecting the planar electrode connections.
2Ease of manufacture
If one end of the internal electrode is in direct contact with the external electrode, then manufacturing is easier, but the contact area is insufficient leading to increased equivalent series resistance
Solution Approach 1:
The extension unit with insulating layer serves as a mediator that increases the effective contact area between internal and external electrodes. The insulating layer provides multiple via electrodes that create distributed contact points, effectively increasing the total contact area without complicating the manufacturing process. This intermediary structure allows for better electrical connection while maintaining ease of assembly.
Solution Approach 2:
The extension unit divides the connection interface into multiple segments through the inclusion of multiple via electrodes distributed across the insulating layer. This segmentation increases the total contact area between internal and external electrodes by creating multiple parallel conduction paths, thereby reducing equivalent series resistance while keeping the manufacturing process straightforward.
3Volume of moving object
If the exposed end of the internal electrode is close to the corner of the external electrode, then the structure is compact, but this creates major pathways for oxygen and moisture penetration
Solution Approach 1:
The extension unit with insulating layer acts as a mediator that blocks the harmful pathways created by the compact geometry. The insulating layer extends over the corner regions where internal electrodes are exposed, preventing moisture and oxygen from reaching these vulnerable areas while maintaining the compact overall size of the component.
Solution Approach 2:
The insulating layer functions as a thin film barrier that conforms to the compact geometry of the component. This flexible protective layer can extend into corner regions and follow the contours of the electrode structure, providing moisture and oxygen protection in compact spaces where traditional bulk protective structures would be too large.
Data Source
AI summary
A multilayer electronic component according to an example embodiment may include: a body including a stack unit including a dielectric layer and internal electrodes alternately arranged in a first direction with the dielectric layer interposed therebetween, when a direction, perpendicular to the first direction, is referred to as a second direction, and a direction perpendicular to the first direction and the second direction, is referred to as a third direction, connection electrodes disposed on surfaces of the stack unit opposing each other in the second direction and in contact with the internal electrode, and an extension unit disposed on the connection electrode and including an insulating layer; and external electrodes disposed on the body, and the extension unit further includes via electrodes in contact with at least a portion of the connection electrode and the external electrode.