Patent ID: 7332445
Filing Date: 2008-02-19
Classification: C03C,C23C,H01L,Y10T

Abstract:
1. A chemical vapor deposition method for forming a porous organosilicate glass film on a substrate, the method comprising the steps of: introducing gaseous reagents comprising a precursor mixture, said precursor mixture comprising at least one organosilane and/or organosiloxane precursor and a porogen precursor having a structure selected from the group consisting of: (a) a hydrocarbon structure containing one or more alcohol groups and having the general formula C (b) a hydrocarbon structure containing one or more ether linkages and having the general formula C (c) a hydrocarbon structure containing one or more epoxide groups and having the general formula C (d) a hydrocarbon structure containing one or more aldehyde groups and having the general formula C (e) a hydrocarbon structure containing one or more ketone groups and having the general formula C (f) a hydrocarbon structure containing one or more carboxylic acid groups and having the general formula C (g) a hydrocarbon structure containing an even number of carboxylic acid groups and in which the carboxylic acid is dehydrated to form a cyclic anhydride group where the structure has the general formula C (h) a hydrocarbon structure containing an ester group with the general formula C (i) a hydrocarbon structure containing an acrylate functionality consisting of an ester group and at least one unsaturated bond that is conjugated with the carbonyl of the ester group, and having the general formula C (j) a hydrocarbon structure containing any combination of functional groups selected from the following list: alcohol, ether, carbonyl, and carboxylic acid and having the general formula C (k) a hydrocarbon structure containing one or more primary amine groups and having the general formula C (l) a hydrocarbon structure containing one or more secondary amine groups and having the general formula C (m) a hydrocarbon structure containing one or more tertiary amine groups and having the general formula C (n) a hydrocarbon structure containing one or more nitro groups and having the general formula C (o) a hydrocarbon structure having at least one amine functional group and ether linkage and having the general formula C (p) a hydrocarbon structure having both amine and alcohol groups and having the general formula C (q) and mixtures thereof; applying energy to the gaseous reagents to induce reaction of the gaseous reagents and provide a preliminary film, wherein the preliminary film comprises a porogen derived from said porgen precursor; and removing at least a portion of the porogen from the preliminary film to provide the porous organosilicate class film, wherein said porous organosilicate glass film has a dielectric constant less than 2.7.