PROTECTIVE FILM, REFLECTIVE MEMBER, AND PRODUCTION METHOD FOR PROTECTIVE FILM

摘要

A protective film placed on an upper part of a metal film for protecting the metal film placed on a glass substrate. The protective film includes a silica film. The silica film has an extinction coefficient "k" less than or equal to 1 X 10 -4 , a refractive index "n" greater than or equal to 1.466 at a wavelength of 632 nm, and a carbon content less than or equal to 3 atomic %.