Abstract:
PROBLEM TO BE SOLVED: To provide a material for absorbing near-infrared light for use in an optical auto-focus, and a laminated film including a near-infrared absorbing film formed of the material and a photoresist film.SOLUTION: A near-infrared light absorbing film formation material contains (A) a polymer compound containing at least one kind of formulas (1) to (4); (B) a polymer compound containing an aromatic ring (except for the (A) component); (C) a near-infrared light absorbing dye and (D) a solvent. (In the formulas, R, R, Rand Rare H, CH, F or CF; Rto Rare H, F, CF, -C(CF)OR, an alkyl group or an alkoxy group; one or more of Rto Ris a fluorine atom or a group containing fluorine; R, Rand Rare H or a monovalent organic group; and Ris a hydrocarbon group substituted by a fluorine atom.)
Abstract:
A lithographic patterning method includes forming a multi-layer patterning material film stack on a semiconductor substrate, the patterning material film stack including a resist layer formed over one or more additional layers, and forming a metal-containing top coat over the resist layer. The method further includes exposing the multi-layer patterning material film stack to patterning radiation through the metal-containing top coat to form a desired pattern in the resist layer, removing the metal-containing top coat, developing the pattern formed in the resist layer, etching at least one underlying layer in accordance with the developed pattern, and removing remaining portions of the resist layer. The metal-containing top coat can be formed, for example, by atomic layer deposition or spin-on deposition over the resist layer, or by self-segregation from the resist layer.
Abstract:
Photoactive polymer brush materials and methods for EUV photoresist patterning using the photoactive polymer brush materials are described. The photoactive polymer brush material incorporates a grafting moiety that can be immobilized at the substrate surface, a dry developable or ashable moiety, and a photoacid generator moiety, which are bound to a polymeric backbone. The photoacid generator moiety generates an acid upon exposure to EUV radiation acid at the interface, which overcomes the acid depletion problem to reduce photoresist scumming. The photoacid generator moiety can also facilitate cleavage of the photoactive polymer brush material from the substrate via an optional acid cleavable grafting functionality for the grafting moiety. The dry developable or ashable moiety facilitates complete removal of the photoactive brush material from the substrate in the event there is residue present subsequent to development of the chemically amplified EUV photoresist.
Abstract:
A lithographic patterning method includes forming a multi-layer patterning material film stack on a semiconductor substrate, the patterning material film stack including a resist layer formed over one or more additional layers, and forming a metal-containing top coat over the resist layer. The method further includes exposing the multi-layer patterning material film stack to patterning radiation through the metal-containing top coat to form a desired pattern in the resist layer, removing the metal-containing top coat, developing the pattern formed in the resist layer, etching at least one underlying layer in accordance with the developed pattern, and removing remaining portions of the resist layer. The metal-containing top coat can be formed, for example, by atomic layer deposition or spin-on deposition over the resist layer, or by self-segregation from the resist layer.