Patent ID: 8137764
Filing Date: 2012-03-20
Classification: C03C,C23C,H01L,Y10T

Abstract:
1. A process for making an organosilicate glass film having a dielectric constant of 4.0 or less, the process comprising: providing a silicon-containing mixture that is one selected from the following: a mixture (i) comprising a first silicon-containing precursor that comprises from 3 to 4 Si—O bonds per Si atom, from 0 to 1 of a bond selected from the group consisting of Si—H, Si—Br, or Si—Cl bonds per Si atom, and no Si—C bonds, and a second silicon-containing precursor that comprises at least one Si—C bond per Si atom; and a mixture (ii) comprising an asymmetric silicon-containing precursor having a number ratio of Si—C bonds to Si atoms that is less than 1; adding a hydrocarbon porogen to the silicon-containing mixture, wherein the hydrocarbon porogen is plasma-polymerizable and is selected from the group consisting of: introducing the silicon-containing mixture and the hydrocarbon porogen into a reaction chamber having a substrate contained therein; and applying plasma energy to the silicon-containing mixture and the hydrocarbon porogen in the reaction chamber to induce a polymerization reaction and deposit the organosilicate glass film on the substrate by chemical vapor deposition, wherein the organosilicate glass film comprises a structure-former phase formed by the polymerization reaction of the silicon-containing mixture and a pore-former phase formed by the polymerization reaction of the hydrocarbon porogen.