Patent ID: 7101948

Claim:
A process for stabilizing a cyclotetrasiloxane against polymerization used in a chemical vapor deposition process for silicon oxides in electronic material fabrication and stabilized for extended periods of heating, comprising; providing an effective amount of a free radical polymerization inhibitor to said cyclotetrasiloxane having the following formula: where R 1-7 are individually selected from the group consisting of hydrogen, a normal, branched or cyclic C 1-10 alkyl group, and a C 1-4 alkoxy group, wherein said free radical scavenger is selected from the group consisting of: 2,6-ditert-butyl-4-methyl phenol, 2,2,6,6-tetramethyl-1-piperidinyloxy, 2,6-dimethylphenol, 2-tert-butyl-4-hydroxyanisole, 3-tert-butyl-4-hydroxyanisole, propyl ester 3,4,5-trihydroxy-benzoic acid, 2-(1,1-dimethylethyl)-1,4 benzenediol, diphenylpicrylhydrazyl, 4-tert-butylcatechol, N-methylaniline, 2,6-dimethylaniline, p-methoxydiphenylamine, diphenylamine, N,N′-diphenyl-p-phenylenediamine, p-hydroxydiphenylamine, phenol, octadecyl-3-(3,5-di-tert-butyl-4 -hydroxyphenyl) propionate, tetrakis (methylene (3,5-di-tert-butyl-4-hydroxy-hydrocinnamate) methane, phenothiazines, alkylamidonoisoureas, thiodiethylene bis (3,5,-di-tert-butyl-4-hydroxy-hydrocinnamate, 1,2,-bis (3,5-di-tert-butyl-4-hydroxyhydrocinnamoyl) hydrazine, tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, cyclic neopentanetetrayl bis (octadecyl phosphite), 4,4′-thiobis (6-tert-butyl-m-cresol, 2,2′-methylenebis (6-tert-butyl-p-cresol), oxalyl bis (benzylidenehydrazide) and mixtures thereof.