Applied Materials, Inc.
SELECTIVE DEPOSITION OF CARBON ON PHOTORESIST LAYER FOR LITHOGRAPHY APPLICATIONS

Abstract:

Embodiments disclosed within include a method for etching a hardmask layer includes forming a photoresist layer comprising an organometallic material on a hardmask layer comprising a metal-containing material, exposing the photoresist layer to ultraviolet radiation through a mask having a selected pattern, removing un-irradiated areas of the photoresist layer to pattern the photoresist layer, forming a passivation layer comprising a carbon-containing material selectively on a top surface of the patterned photoresist layer, including selectively depositing passivation material over a top surface of a patterned photoresist layer trimming undesired portions of the passivation material, and etching the hardmask layer exposed by the patterned photoresist layer having the passivation layer formed thereon.