Patent ID: 8101236

Claim:
A method of fabricating a SiCOH dielectric material comprising: placing a substrate into a reactor; providing at least a first gas precursor containing atoms of Si, C, O and H, said first gas precursor comprising a carbosilane or alkoxycarbosilane molecule containing Si—CH 2 —Si bonding; and depositing a dielectric film derived from said first gas precursor by chemical vapor deposition onto said substrate by selecting conditions that are effective in providing a SiCOH dielectric having dielectric constant of 3.2 or less, wherein the dielectric film comprises at least atoms of Si, C, O, H and has a covalently bonded tri-dimensional network structure in which a fraction of the C atoms are bonded as Si—CH 3 functional groups, and another fraction of the C atoms are bonded as Si—R—Si, wherein R is phenyl, —[CH 2 ] n — where n is greater than or equal to 1, HC═CH, C═CH 2 , C≡C or a [S] n linkage, where n is a defined above.