“…In general, compounds with less than one oxygen atom per silicon in their structure (e.g., trimethylsilane, tetramethylsilane, dimethylphenylsilane, diphenylsilane, diphenylmethylsilane, and hexamethyldisiloxane), codeposited with an oxidant (e.g., N 2 O or O 2 ), are preferred (60,61). Radio frequency (13.56 MHz) plasma-assisted deposition of tetramethylsilane with N 2 O or O 2 produced the first thermally stable SiCOH material with a dielectric constant of 3.1 (60)(61)(62)(63). It is important to create network-forming Si-O-Si bonds in the SiCOH film.…”