Development of porous antireflective films on soda-lime-silica glass

Glass compositions were surveyed to identify candidates that could be heat-treated to produce an interconnected phase-separated structure needed for porous antireflective films and which matched the viscosity-temperature characteristics needed for the float glass process. A glass composition of 10% Na2O,10% CaO, and 80% SiO2 meets these criteria. Microstructural development and film-formation kinetics were characterized to permit definition of appropriate heat-treatment and selective dissolution processes. Broadband antireflective characteristics were developed on treated glass surfaces.