Abstract:
A method of fabricating a semiconductor structure includes forming a dielectric layer overlaying a substrate; forming a trench in the dielectric layer; forming a first barrier layer lining the trench; forming a conductive layer overlaying the first barrier layer; forming a second barrier layer overlaying the conductive layer; forming a metallic sacrificial layer to cover the second barrier layer and to fill the trench; and performing a polishing process to remove the materials above a bottom portion of the second barrier layer.
Abstract:
A robust metallization profile is formed by pre-treat an anti-reflective coating layer by plasma before forming a hard mask layer. Pre-treatment is helpful especially in small feature size process, for example, 50 nm and below. By changing constitution of a surface layer of the anti-reflective coating, interface of the anti-reflective coating layer and the hard mask layer is smoothed which results in less overhang and better gap-filling performance.
Abstract:
A method of fabricating a semiconductor structure includes forming a dielectric layer overlaying a substrate; forming a trench in the dielectric layer; forming a first barrier layer lining the trench; forming a conductive layer overlaying the first barrier layer; forming a second barrier layer overlaying the conductive layer; forming a metallic sacrificial layer to cover the second barrier layer and to fill the trench; and performing a polishing process to remove the materials above a bottom portion of the second barrier layer.