OLED Microcavity Dummy Electrode Layer

The patent divides the electrode structure into functional segments: a real electrode layer for electrical conduction and a dummy electrode layer specifically for creating microcavity structures. This segmentation allows the microcavity formation to be handled by a separate, simplified deposition process rather than requiring complex etching of the real electrode, thus reducing manufacturing complexity while maintaining precise microcavity length control for different sub-pixel colors

The dummy electrode layer acts as an intermediary structure that serves the dual purpose of defining microcavity geometry and enabling color differentiation across sub-pixels. By using this intermediate layer instead of modifying the real electrode through multiple etching steps, the patent simplifies the manufacturing process while achieving the required precision in microcavity lengths for red, green, and blue sub-pixels

The dummy electrode layer is deposited in advance as a preliminary structure that pre-defines the microcavity geometry before the real electrode is formed. This preliminary action eliminates the need for subsequent complex etching processes to create microcavities, thereby reducing the total number of manufacturing steps, improving yield, and increasing production efficiency while maintaining precise microcavity structure formation

The dummy electrode layer functions as a disposable sacrificial structure that is deposited, used to define microcavity shapes, and then removed or left as a non-functional layer. This approach is more cost-effective than using expensive multiple deposition and etching processes on the real electrode, as the dummy layer can be formed by a single, simple deposition step that reduces manufacturing cost and improves productivity