Patent ID: 7622399

Claim:
A method of forming a low dielectric constant structure, comprising the steps of: providing on a substrate a non Si—H containing dielectric material having a first elastic modulus; and curing the dielectric material whereby the material is heated from a first temperature to a second temperature by increasing the temperature at an average rate of at least 1° C. per second or more, to produce a dielectric material having a second elastic modulus, which is greater than the first elastic modulus; wherein the dielectric material is formed from a precursor that is a silicon-containing chemical compound having the formula (R 1 —R 2 ) n —Si—(X 1 ) 4−n , wherein X 1 is halogen, acyloxy, alkoxy or OH group, R 2 is an optional group and comprises an aromatic group having 6 carbon atoms and R 1 is a substituent at position 4 of R 2 selected from an alkyl, cyclo alkyl or polycyclo alkyl group having from 1 to 13 carbon atoms, an alkenyl group having from 2 to 5 carbon atoms, an alkynyl group having from 2 to 5 carbon atoms, Cl or F; and n is an integer 1-3; and is an organosiloxane polymeric material selected from the group consisting of methylsilsesquioxane, phenylsilsesquioxane, methylphenylsilsesquioxane, methylvinylsilsesquioxane, phenylvinylsilsesquioxane, vinylsilsesquioxane, methylphenylvinylsilsesquioxane; adamantyl or adamantyl derivative containing silsesquioxane; and perfluorinated or partially fluorinated aryl, alkyl or aryl-alkyl containing silsesquioxane.