Patent ID: 6846515
Filing Date: 2005-01-25
Classification: C23C

Abstract:
1. A chemical vapor deposition method for producing a porous organosilica glass film represented by the formula Si v O w C x H y F z , where v+w+x+y+z=100%, v is from 10 to 35 atomic %, w is from 10 to 65 atomic %, x is from 5 to 30 atomic %, y is from 10 to 50 atomic % and z is from 0 to 15 atomic %, said method comprising: providing a substrate within a vacuum chamber; introducing into the vacuum chamber gaseous reagents including at least one precursor gas selected from the group consisting of an organosilane and an organosiloxane, and a porogen distinct from the at least one precursor gas; applying energy to the gaseous reagents in the vacuum chamber to induce reaction of the gaseous reagents to deposit a preliminary film on the substrate, wherein the preliminary film contains the porogen, and the preliminary film is deposited without added oxidants; and removing from the preliminary film substantially all of the porogen to provide the porous film with pores and a dielectric constant less than 2.6.