Patent ID: 7479462

Claim:
A method of forming a thin film having a dielectric constant of 2.9 or less, comprising hydrolyzing a first silicon compound having the general formula I X 1 3-a —SiR 1 b R 2 c R 3 d I wherein X 1 represents a hydrolyzable group; R 1 is an alkenyl or alkynyl group, which optionally bears one or more substituents; R 2 and R 3 are independently selected from hydrogen, substituted or non-substituted alkyl groups, substituted or non-substituted alkenyl and alkynyl groups, and substituted or nonsubstituted aryl groups; a is an integer 0, 1 or 2; b is an integer a+1; c is an integer 0, 1 or 2; d is an integer 0 or 1; and b+c+d=3 with a second silicon compound having the general formula II X 2 3-e —SiR 4 f R 5 g R 6 h II wherein X 2 represents a hydrolyzable group; R 4 is an aryl group, which optionally bears one or more substituents; R 5 and R 6 are independently selected from hydrogen, substituted or non-substituted alkyl groups, substituted or non-substituted alkenyl and alkynyl groups, and substituted or non-substituted aryl groups; e is an integer 0, 1 or 2; f is an integer e+1; g is an integer 0, 1 or 2; h is an integer 0 or 1; and f+g+h=3 and optionally with a third silicon compound having the general formula III X 3 3-i —SiR 7 j R 8 k R 9 l III wherein X 3 represents a hydrolyzable group; R 7 is an alkyl group, which optionally bears one or more substituents; R 8 and R 9 are independently selected from hydrogen, substituted or non-substituted alkyl groups, substituted or non-substituted alkenyl or alkynyl groups, and substituted or nonsubstituted aryl groups; i is an integer 0, 1 or 2; j is an integer i+1; k is an integer 0, 1 or 2; l is an integer 0 or 1; and j+k+l=3 to produce a siloxane material; depositing the siloxane material in the form of a thin layer; and curing the thin layer to form a film.