Surface Mounted Component Virtual Electrode Alignment
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Solution Overview
Problem
Conventional surface mount technology (SMT) requires multiple types of surface mount devices (SMDs) with different conductive electrode specifications to match various pad sizes on printed circuit boards, leading to complex production control and increased inventory costs, as well as issues with inaccurate alignment and unstable welding due to potential sliding of SMDs during solder paste melting.
Innovation Solution
A surface mounted electronic component design featuring a main body with conductive electrodes and virtual electrodes, where the virtual electrodes are strategically positioned to correspond with pad sizes and shapes, ensuring accurate alignment and welding by maintaining a specific distance from the conductive electrodes, allowing a single specification component to be adapted for different pad sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple types of SMDs with different conductive electrode specifications are used to match various pad sizes, then the adaptability to different pad sizes is improved, but the device complexity and inventory cost increase
Solution Approach 1:
The SMD is designed with a universal conductive electrode structure that can adapt to multiple pad sizes through the interaction with virtual electrodes. The component maintains a standard electrode configuration while relying on the PCB pad geometry and virtual electrode positioning to achieve proper alignment and welding for different pad sizes, eliminating the need for multiple electrode specifications.
Solution Approach 2:
Virtual electrodes are positioned on the PCB pad to replicate or correspond with the conductive electrode pattern of the SMD. This copying approach allows the SMD to align properly with various pad sizes by matching its electrode pattern against the virtual electrode positions defined by the PCB design, rather than requiring the SMD itself to have variable electrode configurations.
2Adaptability or versatility
If multiple types of SMDs with different conductive electrode specifications are used to match various pad sizes, then the adaptability to different pad sizes is improved, but the inventory cost increases
Solution Approach 1:
The SMD employs a universal electrode design that can be used across different applications with varying pad sizes. By standardizing the conductive electrode specifications while using virtual electrodes and pad geometry for adaptation, manufacturers can maintain a single type of SMD in inventory rather than stocking multiple variants, thereby reducing inventory costs.
3Adaptability or versatility
If the SMD conductive electrode size is reduced to match small pads, then the adaptability to small pads is improved, but the manufacturing precision and alignment stability deteriorate due to potential sliding during solder paste melting
Solution Approach 1:
Virtual electrodes act as intermediaries between the SMD conductive electrodes and the PCB pads. By positioning virtual electrodes on the pad surface that correspond to the SMD electrode pattern, the system achieves precise alignment without requiring the physical SMD electrodes to be exactly the same size as the pads. This intermediary approach maintains alignment precision while adapting to different pad sizes.
4Device complexity
If a single type of SMD is used for different pad sizes, then the production complexity is reduced, but the assembly precision deteriorates due to potential sliding of the SMD during welding
Solution Approach 1:
The virtual electrode pattern on the PCB pad is designed to copy or correspond with the conductive electrode pattern of the SMD. This copying mechanism ensures that regardless of pad size variations, the SMD aligns precisely with the pad during assembly, maintaining manufacturing precision while using a single SMD type across different applications.
Data Source
AI summary
A surface mounted electronic component is provided. The surface mounted electronic component includes a main body, a circuit element, a conductive electrode, and a virtual electrode. The circuit element is arranged in the main body. The conductive electrode is disposed on an outer surface of the main body, wherein the conductive electrode electrically is connected to the circuit element. The virtual electrode is disposed on the outer surface of the main body, wherein the virtual electrode lies near the conductive electrode. There is a distance between the virtual electrode and the conductive electrode.