Patent ID: 6740475
Filing Date: 2004-05-25
Classification: G03F,Y10S

Abstract:
A process for structuring a photoresist layer, which comprises:a) providing a substrate to which a photoresist layer is applied at least in some areas, the photoresist layer including: a film-forming polymer containing molecular groups convertible into alkali-soluble groups by acid-catalyzed cleavage reactions; a photoacid generator releasing an acid on exposure to light in a first defined wavelength range (&Dgr;&lgr;1); and a photobase generator releasing a bass on exposure to light in a second defined wavelength range (&Dgr;&lgr;2); b) exposing areas of the photoresist layer to a first light in the second defined wavelength range (&Dgr;&lgr;2), the first light having a wavelength at which the photoacid generator is substantially inert; c) exposing areas of the photoresiat layer to a second light in the first defined wavelength range (&Dgr;&lgr;1) the second light having a wavelength at which the photobase generator is substantially inert; d) heating the photoresist layer to a temperature at which the acid-catalyzed cleavage reaction occurs; and e) developing the photoresist layer with an alkaline solution.