Multilayer Capacitor External Electrodes With Spaced Resin Barriers
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Solution Overview
Problem
Multilayer ceramic capacitors face challenges in achieving high reliability, strength, heat resistance, moisture resistance, and low equivalent series resistance (ESR) due to increasing demands in miniaturization, high voltage applications, and the need to prevent arc discharge and improve electrical connectivity between electrode layers and conductive resin layers.
Innovation Solution
A multilayer electronic component design featuring dielectric layers and alternately stacked internal electrodes with external electrodes connected through conductive resin layers, where non-conductive resin layers are strategically placed to enhance bending strength, heat resistance, and moisture resistance, while reducing the risk of arc discharge by creating a non-conductive barrier and improving electrical connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a double-layer structure including electrode layer and conductive resin layer is used, then reliability is improved by absorbing external impacts and preventing permeation of plating liquid, but arc discharge may occur between ends of band portions of external electrode under high voltage
Solution Approach 1:
A non-conductive resin layer is introduced as an intermediary between the conductive resin layer and the electrode layer. This non-conductive layer acts as a barrier that prevents arc discharge while allowing the conductive resin layer to maintain its protective functions. The non-conductive resin layer specifically covers the band portion of the external electrode, creating an insulating barrier that eliminates the harmful arc discharge effect.
Solution Approach 2:
The external electrode structure is transformed into a composite multi-layer structure consisting of the electrode layer, conductive resin layer, and non-conductive resin layer. This composite structure combines the electrical conductivity of the electrode layer, the impact absorption and plating liquid barrier properties of the conductive resin layer, and the arc discharge prevention properties of the non-conductive resin layer, thereby resolving the contradiction between reliability improvement and arc discharge prevention.
2Reliability
If conductive resin layer is applied onto electrode layer, then electrical connectivity is improved, but bending strength characteristics need further improvement to meet increasing industry standards
Solution Approach 1:
The patent creates a composite structure where the non-conductive resin layer is disposed between the conductive resin layer and the electrode layer. This composite arrangement allows the conductive resin layer to provide electrical connectivity while the non-conductive resin layer reinforces the overall structure, improving bending strength characteristics. The non-conductive resin layer acts as a structural reinforcement that prevents delamination and enhances the mechanical integrity of the external electrode assembly.
3Object-affected harmful factors
If non-conductive resin layer is disposed between conductive resin layer and electrode layer, then arc discharge is suppressed and bending strength is improved, but electrical connectivity between electrode layer and conductive resin layer must be maintained
Solution Approach 1:
The non-conductive resin layer is selectively disposed only in specific regions - between the conductive resin layer and electrode layer in areas where arc discharge is most likely to occur (particularly in the band portion regions). This localized application maintains electrical connectivity in areas where conductive paths are needed while providing arc discharge suppression in critical regions. The non-conductive resin layer does not completely isolate the conductive resin layer from the electrode layer, allowing controlled electrical contact in non-band regions.
Data Source
AI summary
A multilayer electronic component include a first non-conductive resin layer, extending between a conductive resin layer and an electrode layer of a first external electrode, and a second non-conductive resin layer extending between a conductive resin layer and an electrode layer of a second external electrode. The first non-conductive layer and the second non-conductive layer may be spaced apart from each other to suppress arc discharge and to improve bending strength.