Substrate Terminal Connection Electrode Width Variation
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Solution Overview
Problem
Existing electronic components face mounting defects due to burrs on substrate terminals, which compromise mounting stability when attempting to suppress vibration noise by reducing electrode size.
Innovation Solution
The electronic component design features a substrate terminal with a connection electrode wider than the mounting electrode, where the connection electrode's circumferential-surface neighboring portion covers the substrate terminal's circumferential surface, ensuring the substrate terminal is entirely covered by the electronic element, thereby preventing burr formation and maintaining stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the electrodes are reduced in size to suppress burr occurrence on the substrate terminal, then the harmful factors (burr formation) are reduced, but the mounting stability is reduced
Solution Approach 1:
The connection electrode is designed with non-uniform width, being wider at the outer peripheral portion adjacent to the circumferential surface of the substrate terminal and narrower at the inner peripheral portion. This local variation in geometry allows the outer portion to suppress burr formation while the overall electrode structure maintains adequate mounting stability.
2Reliability
If the connection electrode is made wider to maintain mounting stability, then the mounting stability is improved, but burrs may form on the electrode
Solution Approach 1:
The connection electrode implements local quality differentiation through its width variation: the outer peripheral portion has greater width to prevent burr formation during mounting, while the inner peripheral portion has reduced width to maintain overall mounting stability. This localized geometric optimization resolves the contradiction between electrode size and burr suppression.
3Object-generated harmful factors
If the substrate terminal structure is modified to prevent burrs, then the harmful factors are reduced, but the device complexity may increase
Solution Approach 1:
The substrate terminal maintains a simple overall structure while incorporating local geometric variation in the connection electrode width. This minimal modification to the electrode geometry achieves burr suppression without significantly increasing device complexity, as the fundamental substrate terminal structure remains unchanged.
Data Source
AI summary
An electronic component includes an electronic element including external electrodes on a surface and a substrate terminal on which the electronic element is mounted. The substrate terminal includes a first main surface, a second main surface opposite the first main surface, and a peripheral surface joining the first main surface and the second main surface. The substrate terminal includes mounting electrodes provided on the second main surface and electrically connected to the external electrodes of the electronic element, and connection electrodes provided on the first main surface and electrically connected to lands of a circuit substrate. A maximum width of the connection electrodes is greater than a maximum width of the mounting electrodes.