Patent ID: 7813615

Claim:
A method of fabricating a flexible film optical waveguide, comprising: providing a cladding layer formed of an organic-inorganic hybrid material on a substrate; radiating light onto the cladding layer in a predetermined pattern, to form a core layer having a refractive index higher than that of the cladding layer on the cladding layer; and removing the substrate, wherein the organic-inorganic hybrid material is a polymer having a network structure formed by bonding of an oxygen atom or an organic monomer enabling network formation or network modification to silicon therein, the polymer obtained by condensation of a compound of Formula 1 below with a compound selected from the group consisting of Formula 2 and Formula 3 below: R 1 R 2 Si(OH) 2 Formula 1 R 3 a R 4 b M(OR 5 ) (c-a-b) Formula 2 (OR 6 ) n Si—(X—R 7 ) m ( n+m= 4) Formula 3 where R 1 , R 2 , R 3 and R 4 are each a linear, branched or cyclic C 1˜12 hydrocarbon group having a functional group selected from among an alkyl group, a ketone group, an acryl group, a methacryl group, an allyl group, an alkoxy group, an aromatic group, a halogen group, an amino group, a mercapto group, an ether group, an ester group, a sulfone group, a nitro group, a hydroxy group, a cyclobutene group, a carbonyl group, a carboxyl group, an alkyd group, a urethane group, a vinyl group, a nitrile group, hydrogen, an epoxy group, and mixtures thereof; R 6 is a linear or branched alkyl group having 1˜10 carbons or a hydrogen atom; X is a carbon chain having 3˜6 carbons; R 7 is a fluorocarbon having a substituted fluorine atom in a carbon chain having 4˜8 carbons or including a vinyl group, a glycidoxy group or a methacryl group; n is a natural number from 1 to 4; m is an integer from 0 to 3; a and b are each an integer from 0 to 3; c is an integer from 3 to 6; M is silicon or metal; and R 5 is a linear, branched or cyclic C 1˜12 hydrocarbon having a functional group selected from among an alkyl group, an alkoxy group, a ketone group, an aromatic group, and mixtures thereof.