Applied Materials, Inc.
Enhanced plating bath and additive chemistries for cobalt plating

Abstract:

Implementations of the disclosure may include methods of electroplating features formed on a semiconductor device, such as the trenches and vias formed by single or dual Damascene processes using a cobalt plating bath. The cobalt electroplating bath may contain "additive packages" or "additive systems" that include a combination of additives in certain ratios that facilitate the metal filling of high aspect ratio sub-micrometer features. Implementations of the disclosure provide new cobalt plating bath methods and chemistries and that include alkyl modified imidazoles, imidazolines, and imidazolidines suppressor compounds.