Patent ID: 7521377

Claim:
A method of fabricating a SiCOH dielectric material comprising: forming a preliminary dielectric film having Si—CH 2 —CH 2 —Si bonding units and containing a single organosilicon precursor with a built-in sacrificial organic porogen on a surface of a substrate utilizing plasma enhanced chemical vapor deposition (PECVD) from a vapor or liquid phase, said single organosilicon precursor containing the built-in sacrificial organic porogen is selected from the group consisting of: wherein R is alkyl and n is 1-3, and the cyclic hydrocarbon in each of the above formulas is the built-in sacrificial organic porogen; and performing an energetically treatment step on said preliminary dielectric film to substantially remove said built-in sacrificial organic porogen from said preliminary dielectric film providing a porous dielectric film comprising atoms of Si, C, H and O that has a dielectric constant of about 2.7 or less and a narrow and uniform pore size distribution, said pore size distribution has a maximum size pore of from about 0.1 to about 10 nanometers.