Patent ID: 7229695

Claim:
An antireflective layer comprising a plurality of functional layers having different refractive indexes, the plurality of functional layers including a low refractive index layer containing a fluorine-containing copolymer, wherein the low refractive index layer further contains a polymer represented by the following formula [5]: wherein R 1 and R 2 may be same or different and each represents a hydrogen atom, an alkyl group or an aryl group; p is an integer of from 10 to 500; R 3 , R 4 and R 5 may be same or different and each represents a hydrogen atom or a monovalent organic group; R 6 represents a hydrogen atom or a methyl group; L′ represents an alkylene group having from 1 to 25 carbon atoms or an arylene group having from 1 to 25 carbon atoms; R 11 represents a hydrogen atom or a methyl group; X represents an oxygen atom, a sulfur atom or —N(R 13 )—; R 12 is a linear, branched, alicyclic, or aromatic hydrocarbon that may optionally contain at least one substituent selected from the group consisting of a chlorine atom, an amine group, a carboxylic acid group, an alkyloxy group, a nitro group, a hydroxyl group, an alkyl ester group, and a nitrile group; R 13 represents a hydrogen atom or an alkyl group having from 1 to 8 carbon atoms; and a and b represent mass fractions (%) of respective components, provided that 0.01≦a≦100 and 0≦b≦95, and a+b=100.