Abstract:
A polymer comprising 0.5-10 mol% of recurring units having acid generating capability and 50-99.5 mol% of recurring units providing for dissolution in alkaline developer is used to formulate a chemically amplified negative resist composition. When used in a lithography process, the composition exhibits a high resolution and forms a negative resist pattern of a profile with minimized LER and undercut.
Abstract:
PROBLEM TO BE SOLVED: To provide an actinic ray sensitive or radiation sensitive resin composition which allows the formation of an isolated line pattern with high resolution and a good profile and is excellent in other resist performances including roughness characteristics, and to provide an actinic ray sensitive or radiation sensitive film and a pattern forming method using the composition.SOLUTION: There is provided an actinic ray sensitive or radiation sensitive resin composition containing a compound (P) having at least one phenolic hydroxyl group and at least one group whose hydrogen atom of the phenolic hydroxyl group is substituted by a group represented by general formula (1). Each symbol in the formula represents the meaning described in the claims and the specification of the present invention.
Abstract:
PROBLEM TO BE SOLVED: To provide a chemically amplified positive resist composition for forming a pattern satisfying demands for high sensitivity, high resolution (for example, high resolving power, an excellent pattern profile and small line edge roughness (LER)) and good dry etching durability, and to provide a resist film, a resist-coated mask blank, a resist pattern forming method and a photomask using the composition.SOLUTION: The positive resist composition contains a polymeric compound having a structure in which a hydrogen atom in a phenolic hydroxyl group is substituted with an acid-labile group expressed by general formula (I). In the general formula (I), R represents a monovalent organic group; A represents a group having a polycyclic hydrocarbon cyclic structure or a group having a polycyclic heterocyclic structure; and * represents a bonding position of the phenolic hydroxyl group with an oxygen atom.