Cover Plate Water Vapor Barrier with Absorption Layer

The encapsulation area is divided into multiple functional layers: encapsulation layer, first barrier layer, water absorption layer, and second barrier layer. Each layer performs a specific function - the barrier layers block water vapor, the water absorption layer absorbs permeated water vapor, and the encapsulation layer provides structural support and sealing. This segmentation resolves the contradiction by creating a multi-layer structure that achieves superior water resistance while maintaining reasonable structural complexity.

The patent uses composite material structures including doped barrier layers with supporting particles and combinations of different barrier materials. The supporting particles (such as colloidal silica or勃姆石) are doped into the barrier layers to enhance water vapor barrier properties. This composite approach improves water resistance by combining materials with complementary properties, addressing the reliability issue without requiring excessive structural complexity.

The patent applies different properties to different parts of the barrier layers by doping supporting particles locally. The supporting particles are distributed within the barrier layers to provide localized reinforcement and control film formation. This local quality enhancement allows the barrier layers to achieve adequate thickness for water vapor blocking while maintaining manufacturing feasibility by preventing air bubble formation through improved film uniformity.

The supporting particles are pre-doped into the barrier layer materials before the encapsulation process. This preliminary action ensures that when the barrier layers are formed, the supporting particles are already distributed throughout the structure, preventing air bubble formation during the encapsulation process and ensuring uniform film thickness without requiring excessive material thickness.

The multi-layer structure serves multiple functions simultaneously: the barrier layers provide water vapor blocking, the water absorption layer provides additional protection by absorbing any water vapor that penetrates the barrier layers, and the encapsulation layer provides structural support and sealing. This multi-functionality approach enhances encapsulation performance while justifying the increased structural complexity through functional integration.

The water absorption layer acts as an intermediary between the barrier layers, providing an additional protective function. It absorbs any water vapor that manages to penetrate through the barrier layers, serving as a backup protection mechanism. This intermediary layer enhances overall encapsulation performance while maintaining a manageable structural complexity by filling a specific functional gap in the encapsulation system.