Auxiliary Electrode Transfer Structure for OLED Brightness Uniformity

The patent divides the auxiliary cathode into multiple layers: a first auxiliary cathode layer deposited on the OLED back glass, and a second auxiliary cathode layer deposited on the color filter cover plate. This segmentation allows each layer to be optimized independently - the first layer provides mechanical support and baseline conductivity, while the second layer provides additional conductivity where needed, resolving the contradiction between achieving low resistance and maintaining manufacturing precision

The patent introduces a transparent adhesive layer as an intermediary between the first auxiliary cathode layer and the OLED back glass, and between the second auxiliary cathode layer and the color filter cover plate. This intermediary ensures reliable electrical connection and mechanical adhesion without requiring excessive thickness of the black matrix or photo spacer, thereby maintaining manufacturing precision while achieving the desired electrical performance

The patent replaces the chemical-based inkjet printing process with a physical vacuum deposition process. Instead of using metallic nanoparticle ink that requires solvent curing, the auxiliary cathode layers are deposited directly in vacuum, eliminating exposure to water or solvent that could damage OLED devices. This substitution maintains ease of manufacture through automated deposition while dramatically improving device durability

The patent changes the deposition parameters by using vacuum deposition instead of inkjet printing, allowing the auxiliary cathode to be formed without requiring high-temperature curing. The vacuum deposition process occurs at low temperatures, preventing thermal damage to OLED devices while still achieving effective resistance reduction through controlled metal layer deposition