Graded Diffusion Barrier Coatings for Flexible OLED Protection

The patent applies composite materials by creating a multilayer barrier coating system comprising alternating polymeric layers and inorganic ceramic layers. This composite structure combines the flexibility and conformability of polymers with the low permeability and barrier properties of ceramics, achieving both flexibility and resistance to oxygen and water vapor degradation simultaneously

The patent implements the nested doll principle by placing multiple barrier layers within each other in a hierarchical structure. The inorganic ceramic layers are embedded within the polymeric matrix, creating a nested configuration where each layer provides complementary barrier functions, with the ceramic layers blocking diffusion paths and the polymeric layers providing structural continuity and flexibility

The patent applies parameter changes by systematically varying the thickness, composition, and structural parameters of the alternating polymeric and ceramic layers. By optimizing these parameters, the coating achieves enhanced interlayer adhesion while maintaining low permeability, preventing delamination through careful control of layer parameters rather than relying solely on chemical compatibility

The patent implements local quality by creating regions with different material properties and functions within the barrier coating. The polymeric layers provide flexibility and structural continuity in certain regions, while the inorganic ceramic layers provide enhanced barrier properties in other regions, with each layer optimized for its specific local function to prevent delamination