LOW INDEX OF REFRACTION THIN FILM WITH HIGH HARDNESS COATING AND METHOD AND APPARATUS TO PRODUCE SAME

• Main Authors: Nolan, Thomas P, Demtchouk, Alexander Vassilievich, Choi, Jae Ha, Harkness, IV, Samuel D
• Format: Patent
• Language: English
• Published: 20.06.2024
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

A coated article comprising: a transparent substrate and a protective coating comprising: an adhesion layer formed over the substrate; a protective layer formed over the adhesion layer and may have refractive index of from 1.6 to 1.8; and an anti-reflective layer formed over the protective layer, the anti-reflective layer comprises a plurality of sublayers, wherein at least one sublayer has a refractive index higher than index of said protective layer and at least one sublayer has a refractive index lower than the index of said protective layer.