Symmetrical LED Electrode Pad Structure for Assembly Accuracy
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Solution Overview
Problem
The existing LED assembly process requires directional assembly of P-type and N-type electrode pads, which can lead to errors and reduce assembly efficiency due to their different structures, potentially causing shorts and affecting the service life of the LED.
Innovation Solution
An electrode pad structure with a symmetrical arrangement of first and second type electrode pads relative to the centerline of the light emitting device, where the second type electrode pads enclose or are aligned with the first type electrode pads, eliminating the need for directional assembly and improving assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If directional assembly is required for P-type and N-type electrode pads, then assembly confirmation process is needed, but assembly efficiency is reduced and errors may occur
Solution Approach 1:
The patent applies asymmetry by making the first type electrode pad and second type electrode pad have different structures. Specifically, the first type electrode pad has a first structure while the second type electrode pad has a second structure that is different from the first structure. This asymmetric design allows assemblers to easily distinguish between P-type and N-type electrode pads, eliminating the need for complex confirmation processes while maintaining high assembly accuracy.
2Reliability
If different structures are used for P-type and N-type electrode pads, then assembly confirmation is required, but this increases the complexity of the assembly process
Solution Approach 1:
The patent applies local quality by providing different structures specifically at the electrode pad level while keeping the overall LED structure standardized. The first type electrode pad and second type electrode pad have different local structures (different patterns, shapes, or configurations) that enable easy identification, while the rest of the LED device maintains uniform design principles, thus minimizing overall complexity.
3Reliability
If directional assembly is mandated, then assembly confirmation process is needed, but service life may be affected due to potential shorts
Solution Approach 1:
The patent applies preliminary action by pre-designing distinguishable structures for the first type electrode pad and second type electrode pad during the manufacturing stage. These distinct structures (such as different patterns, shapes, or configurations) are built into the electrode pads before assembly, enabling assemblers to quickly identify the correct orientation without requiring time-consuming confirmation processes, thereby preventing assembly errors that could lead to shorts and extending LED service life.
Data Source
AI summary
An electrode pad structure of a light emitting device includes an insulation layer, a first type electrode pad and at least one second type electrode pad. The light emitting device has a centerline and the light emitting device is divided into two equal blocks via the centerline. The first type electrode pad is disposed on the insulation layer and symmetrical to the centerline. The second type electrode pad is disposed on the insulation layer and symmetrical to the centerline. The first type electrode pad is coplanar with the second type electrode pad, and a portion of the insulation layer is exposed between the first type electrode pad and the second type electrode pad.