Patent ID: 7239444

Claim:
A display front plane on which an anti-reflection film is formed on at least one side of the surface of said base material by supplying gas containing the first gas for thin film formation into a discharge space under the atmospheric pressure or the pressure close to it, then, by activating the gas by applying a high frequency electric field to the discharge space, and by exposing the base material to the activated gas, wherein said high frequency electric field is the field where first and second high frequency electric fields are superposed, frequency of the second high frequency electric field ω 2 is higher than that of the first high frequency electric field ω 1 , the relation among intensity of the first high frequency electric field VI, intensity of the second high frequency electric field V 2 , and electric field intensity at start of discharge IV satisfies VI≧IV>V 2 or V 1 >IV≧V 2 , and the power density of the second high frequency electric field is 1 W/cm 2 or more.