LVT Inorganic Encapsulation for OLED Moisture Resistance

The patent changes the material parameters by using LVT inorganic materials with specific viscosity transition temperatures (lower than the metamorphic temperature of the intermediate layer). This parameter change enables the material to flow and self-heal at processing temperatures, resolving the contradiction between manufacturability and encapsulation quality by allowing standard sputtering processes to produce superior encapsulation structures.

The patent employs composite inorganic materials containing LVT components (such as bismuth oxide, boron oxide, or barium oxide combined with other metal oxides). These composite materials combine the benefits of low-temperature viscosity transition with the protective properties of inorganic encapsulation layers, enabling effective encapsulation while maintaining compatibility with existing sputtering manufacturing processes.

The patent carefully controls the viscosity transition temperature parameter to be below the metamorphic temperature of the intermediate layer but above operating temperatures. This precise parameter control ensures the material remains stable during device operation while becoming flowable only during the encapsulation process, preventing moisture reactions during normal use while enabling self-healing during manufacturing.

The patent creates an inert environment by forming the encapsulating structure in a controlled atmosphere during manufacturing, preventing moisture and foreign substances from contacting the LVT inorganic material during the low-temperature processing stage. This inert environment protection eliminates reactivity issues while maintaining the flowability benefits.