Patent ID: 6521300
Filing Date: 2003-02-18
Classification: H01L

Abstract:
A method of a surface treatment in improving adhesion of an organic polymeric low-k dielectric layer having a dielectric constant of approximately between 2.5 and 3.5, the method comprising:depositing a protective layer over a substrate, the protective layer being made of a material selected from the group consisting of silicon nitride, silicon carbide (SiC), and SiC-based ceramics; performing a surface treatment by subjecting a top surface of the protective layer to an oxygen-containing plasma at a pre-selected radio frequency (RF) power to produce a hydrophilic surface across the top surface; forming an adhesion promoter coating (APC) over the plasma-treated top surface of the protective layer, the APC being comprised of promoter molecules, each promoter molecule having at least one hydrophobic group and one hydrophilic group; spin-on coating an organic polymeric low-k layer onto the APC; wherein the formation of the hydrophilic surface alters an orientation of the promoter molecules to facilitate the hydrophilic group of each of the promoter molecules to face the hydrophilic surface while the hydrophobic group of each of the promoter molecules faces the organic polymeric low-k layer, thereby simultaneously enhancing the protective layer/APC interface and the APC/organic polymeric low-k layer interface.