Reactive Multilayer Reflector for High Reflectance

The patent applies different properties to different parts of the protective layer system. The first protective layer (e.g., aluminum oxide) provides corrosion protection, while the second protective layer (e.g., fluoropolymer) is specifically optimized for optical performance with minimal absorption and enhanced reflectance in the operational spectral range. This layered approach with differentiated functions resolves the contradiction between protection and optical performance.

The patent uses a composite protective layer structure combining two different materials with complementary properties. The first layer provides chemical stability and corrosion resistance, while the second layer provides optical transparency and enhanced reflectance. This composite structure allows simultaneous achievement of environmental resistance and high optical performance that neither material could achieve alone.

The patent performs preliminary low-temperature deposition of protective layers with controlled stoichiometry and structure that inherently provide stability without requiring subsequent high-temperature treatment. The layers are deposited in an optimized state that achieves moisture tightness and structural stability at deposition temperature, eliminating the need for thermal annealing that would cause substrate warping.

The patent changes the deposition parameters (temperature, pressure, gas flow ratios) to produce protective layers with desired properties directly during deposition, rather than requiring post-deposition thermal treatment. By optimizing these parameters, the layers achieve stable, non-porous structures without exposing the substrate to high temperatures that would cause warping.

The patent optimizes deposition parameters including gas flow ratios, pressure, and temperature to produce dense, non-porous layers at low temperatures. By carefully controlling these parameters, the layers achieve moisture tightness and structural stability without requiring high-temperature processing, thus maintaining substrate integrity while achieving the desired layer properties.

The patent creates protective layers with locally optimized properties through controlled deposition. The layers are deposited with specific stoichiometry and structure that inherently provide moisture tightness at low temperatures, eliminating the need for high-temperature densification that would compromise substrate integrity.