Patent ID: 7141188
Filing Date: 2006-11-28
Classification: C08G,C08L,H01L,H05K

Abstract:
1. A composition comprising: (a) a dielectric material; and (b) a porogen comprising at least two fused aromatic rings wherein each of said fused aromatic rings has at least one alkyl substituent thereon and a bond exists between at least two of said alkyl substituents on adjacent aromatic rings, wherein said porogen is a polyacenaphthylene copolymer made from acenaphthylene and a monomer selected from the group consisting of vinyl pivalate; tert-butyl acrylate, 2-vinylnaphthalene; 5-vinyl-2-norbornene; vinyl cyclohexanone; vinyl cyclopentane; 9-vinylanthracene; 4-vinylbiphenyl; tetraphenylbutadiene; stilbene; tert-butylstilbene; indene; allyl-substituted hydridopolycarbosilane; vinyl acetate; methyl acrylate; methyl methacrylate; and vinyl ether, which porogen is present in an amount sufficient to produce uniformly or randomly dispersed pores through the dielectric material when the porogen is degraded.