Patent ID: 7244683

Claim:
A method of processing a substrate, sequentially comprising: depositing a porous low k dielectric layer on the substrate; depositing and patterning a photoresist on the porous low k dielectric layer; etching the porous low k dielectric layer to form a hole in the porous low k dielectric layer; stripping the photoresist from the substrate; degassing the substrate; pre-cleaning the substrate, wherein pre-cleaning comprises exposing the substrate to one or more plasmas from one or more gases selected from the group of argon, helium, hydrogen, nitrogen, oxidizing gases, fluorine-containing compounds, and combinations thereof; depositing a barrier layer directly on the porous low k dielectric layer, wherein the barrier layer is deposited by cyclical deposition; depositing a seed layer on the barrier layer; and electroplating a metal layer on the seed layer to fill the hole in the porous low k dielectric layer.