Patent ID: 6020265
Filing Date: 2000-02-01
Classification: H01L

Abstract:
A method of forming a planar intermetal dielectric layer over conductive metal structures, the method comprising the steps of:forming a liner oxide layer over the conductive metal structures;forming a cured low dielectric material layer over the liner oxide layer;forming an uncured low dielectric material layer over the cured low dielectric material layer;forming an uncured siloxane layer over the uncured low dielectric material layer;performing a chemical mechanical polishing (CMP) on the uncured siloxane layer and the uncured low dielectric material layer, said CMP stopping at a surface of the cured low dielectric material layer thereby leaving a remaining portion of the uncured low dielectric material layer in a spacing of the conductive metal structures;curing the remaining portion of the uncured low dielectric material layer; andforming a cap oxide layer over the cured low dielectric material layer and the cured remaining portion.