Patent ID: 7241706

Claim:
A method, comprising: depositing a first interlayer dielectric layer on a substrate, the first interlayer dielectric layer having a bottom surface closer to the substrate and a top surface further from the substrate; exposing the first interlayer dielectric layer to electro-magnetic radiation to form a hydrophilic top layer at the top surface of the first interlayer dielectric layer, the hydrophilic top layer being more hydrophilic than a portion of the first interlayer dielectric layer below the hydrophilic top layer; and wherein the first interlayer dielectric layer comprises carbon, silicon, and oxygen in a first ratio before the first interlayer dielectric layer is exposed to electro-magnetic radiation to form the hydrophilic top layer, the hydrophilic top layer comprises carbon, silicon, and oxygen in a second ratio that includes relatively less carbon than the first ratio, and the portion of the first interlayer dielectric layer below the hydrophilic top layer comprises carbon, silicon, and oxygen in a third ratio substantially the same as the first ratio.