METHOD OF IMPARTING ANTIREFLECTION FUNCTION

PURPOSE:To impart an antireflection function to the surface of stocks by subjecting a transparent plastic stock and glass stock which consist essentially of the silicon chain compd. of polyorganosiloxane and are treated by a hard coating material to a low-temp. plasma treatment. CONSTITUTION:The transparent plastic stock and glass stock which consist essentially of the silicon chain compd. of the polyorganosiloxane and are hard coated are irradiated with low-temp. plasma. The plasma treatment is determined by the components, pressure and flow rate of the gas and further the output and treatment time. The gaseous plasma include nitrogen, oxygen, hydrogen, argon, ozone, freon, etc., and polymerizable gaseous plasma which are usable alone or in combination. The gaseous oxygen is more particularly effective for its possibility of forming the antireflection film of porous layers consisting of SiO and SiO2. The antireflection function is imparted to the surface region of the transparent plastic and glass stock by forming the porous layers of the metallic compd. SiO and SiO2 which are known as antireflection films.