External Electrode Structure for Insulated Electronic Components
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Solution Overview
Problem
Conventional electronic components face challenges in preventing accidental electrical connections and enhancing bonding strength to mounting targets, particularly due to the design of external electrodes and the configuration of insulating layers.
Innovation Solution
The electronic component features a sealing member with multiple insulating layers and external electrodes with obverse-surface and side-surface covering portions, which are electrically connected through a wiring portion, preventing accidental connections and improving bonding strength by increasing the bonding area and alleviating stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If external electrodes are designed with only obverse-surface covering portions, then the manufacturing process is simpler, but bonding strength to mounting targets is insufficient and accidental electrical connections cannot be prevented
Solution Approach 1:
The external electrode structure transitions from a two-dimensional obverse-surface covering to a three-dimensional configuration by adding side-surface covering portions that extend along the thickness direction. This dimensional extension allows the electrode to wrap around corners and make contact with mounting targets on multiple surfaces, simultaneously improving bonding strength and preventing accidental electrical connections without requiring completely new manufacturing processes.
Solution Approach 2:
The external electrode is segmented into distinct functional portions: obverse-surface covering portions for primary electrical connection, side-surface covering portions for corner contact and mechanical anchoring, and thickness-direction extensions for stress distribution. This segmentation allows each portion to be optimized for its specific function while maintaining manufacturability through standardized formation processes.
2Reliability
If insulating layers are configured with multiple layers, then accidental electrical connections are prevented, but manufacturing complexity increases
Solution Approach 1:
Insulating layers are strategically positioned at specific locations where accidental electrical connections are most likely to occur, such as between adjacent external electrodes and between different functional portions. Rather than uniformly insulating the entire structure, the patent applies insulation locally at critical interfaces, maintaining reliability while minimizing manufacturing complexity.
3Reliability
If wiring portions are added to connect functional portions and external electrodes, then electrical connectivity is improved, but the risk of accidental electrical connections increases
Solution Approach 1:
Insulating layers serve as intermediary elements between wiring portions and other conductive elements. These intermediary insulation layers ensure that wiring portions can establish necessary electrical connections between functional portions and external electrodes while simultaneously preventing unwanted electrical paths, thus resolving the contradiction between connectivity and accidental connections.
Data Source
AI summary
An electronic component includes a functional portion, a first insulating layer, an external electrode, and a wiring portion. The first insulating layer includes a first obverse surface facing a first side in a thickness direction, and a first side surface facing a first side in a first direction intersecting the thickness direction. The external electrode is electrically connected to the functional portion. The wiring portion electrically connects the functional portion and the external electrode. The external electrode includes an obverse-surface covering portion covering the first obverse surface, and a side-surface covering portion covering the first side surface. The functional portion may include an inductor portion and a capacitor portion.