Abstract:
PROBLEM TO BE SOLVED: To obtain high resolution and superior stability by incorporating a mix of at least two kinds of miscible polymer resins soluble in an aqueous base to make it useful for the blend of a positive type resist. SOLUTION: One of polymer resins soluble in an aq. base is partially protected with protective groups, having high activation energy and the other of the polymer resins soluble in an aqueous base is partially protected with protective groups having low activation energy. The polymer resin to be used is a homopolymer which is soluble in an alkali solution after being deprotected or a multiple polymer containing two or more kinds of repeating monomeric units e.g. a copolymer or a terpolymer and contains polar functional groups which ionize readily. The polar functional groups of the polymer resins are hydroxyl or carboxyl groups. The homopolymer which can be used as the polymer resin is especially preferably polyhydroxystyrene(PHS), and the para-type is most preferable.
Abstract:
PROBLEM TO BE SOLVED: To provide a acid-sensitive positive photoresist composition improved in storage life by incorporating the acid-sensitive positive photoresist polymer component and a radiation-sensitive acid-generating component and an inactivated aromatic amine compound. SOLUTION: This photoresist composition comprises the acid-sensitive positive photoresist polymer component selected from a group comprising an acid- sensitive photoresist polymer, an acid-sensitive photoresist polymer having an acid-sensitive compound added, and an acid-insensitive alkali-soluble photoresist polymer having an acid-sensitive alkali-soluble inhibitor added; and the radiation- sensitive acid generating component; and the inactivated aromatic amine compound. It is preferred that the photoresist polymer has an acid-instable group producing an acid, when it is cleft. This composition may contain a solvent for a nonexposed resist.
Abstract:
PROBLEM TO BE SOLVED: To provide a chemical amplification resist exhibiting improved preservability of a resist coating and almost or completely free from the effect of vacuum in use by incorporating an aq. base-soluble polymer or copolymer having polar functional groups, a part of which is protected with specified cycloaliphatic ketal substituents. SOLUTION: The chemical amplification resist contains an aq. base-soluble polymer or copolymer having polar functional groups, some of which are protected with cycloaliphatic ketal substituents represented by the formula RO-X-as acid decomposable protective groups, an acid generating agent, a solvent for the base-soluble polymer or copolymer, a base and, optionally, a surfactant. In the formula, X is an about 3-12C optionally substd. cycloaliphatic functional group and R is about 1-12C linear or branched alkyl or the like. COPYRIGHT: (C)1999,JPO
Abstract:
PROBLEM TO BE SOLVED: To obtain the negative tone resist composition comparatively high in silicon content and high in sensitivity and resolution by incorporating a silicon-containing polymer having a phenol group, soluble in an aqueous base, a cross-linking agent, an acid generator and a solvent, and allowing the phenolic polymer containing silicon to have a specific structure. SOLUTION: The composition is a silicon-containing negative resist composition and contains a silicon-containing polymer having a phenol group, soluble in an aqueous base, a cross-linking agent capable of cross-linking the silicon- containing polymer at the sites of the phenolic hydroxyl group, an acid generator and a solvent. The silicon-containing phenolic polymer soluble in an aqueous basic solution has structures represented by the formula in which R1 is an acid-insensitive (inactive) blocking group; Z is an H atom or a -Si(CH3)3; and X is