Patent ID: 7771779

Claim:
A process for planarizing a microelectronic substrate with a cross-linked polymer dielectric layer, comprising the steps of: (a) coating the substrate with a composition comprising a solvent, an uncured cross-linkable polymer and a glass transition suppression modifier to form a substrate coated with the composition, wherein the uncured, cross-linkable polymer is the reaction product of cyclopentadienone and acetylene functional compounds wherein at least some of such compounds have three or more reactive groups and wherein the glass transition suppression modifier is a polymer which is substantially removed during the curing step or a monomer which reacts with the cross-linkable polymer; (b) evaporating the solvent from the composition to form the substrate coated with a layer comprising the uncured polymer and the glass transition suppression modifier, (c) heating the substrate coated with a layer comprising the uncured cross-linkable polymer and the glass transition suppression modifier to a temperature greater than the glass transition temperature of the layer, the temperature being less than the curing temperature of the uncured cross-linkable polymer to form a substrate coated with a heat flowed layer; and (d) heating the substrate coated with the heat flowed layer to a curing temperature of the uncured cross-linkable polymer of the heated layer to cure the uncured cross-linkable polymer to form a planarized substrate wherein the percent planarization at 100 micrometers is greater than fifty percent.