摘要:
A radiation-sensitive resin composition which is a resist having properties such as excellent sensitivity, a small degree of line edge roughness of patterns, capability of inhibiting pattern collapsing, and the like is provided. The radiation-sensitive resin composition comprises an acid-dissociable group-containing polymer having recurring units of the following formulas (1-1) and (1-2), an additive of the following formula (1-3), and an acid generator, in the formula (1-1), R1 represents a methyl group and the like and X represents a specific polycyclic alicyclic hydrocarbon group and the like, in the formula (1-2), R1 represents a methyl group and the like and Z represents an acid-dissociable group which is dissociable by the action of an acid, and in the formula (1-3), n is an integer from 1-8 and A individually represents a hydroxyl group and the like.
摘要:
A radiation-sensitive resin composition excelling in basic properties as a resist such as sensitivity, resolution, and the like, having a wide depth of focus (DOF) to both a line-and-space pattern and an isolated space pattern, and exhibiting a minimal line width change due to fluctuation of a bake temperature, and having a small line width limit in which the line pattern destroying phenomenon does not occur, and a lactone-containing copolymer useful as a resin component of the composition are provided.The lactone-containing copolymer is represented by a copolymer of the following compounds (1-1), (2-1), and (3-1). The radiation-sensitive resin composition comprises (a) the lactone-containing copolymer and (b) a photoacid generator.
摘要:
A radiation-sensitive resin composition excelling in basic properties as a resist such as sensitivity, resolution, and the like, having a wide depth of focus (DOF) to both a line-and-space pattern and an isolated space pattern, and exhibiting a minimal line width change due to fluctuation of a bake temperature, and having a small line width limit in which the line pattern destroying phenomenon does not occur, and a lactone-containing copolymer useful as a resin component of the composition are provided.The lactone-containing copolymer is represented by a copolymer of the following compounds (1-1), (2-1), and (3-1). The radiation-sensitive resin composition comprises (a) the lactone-containing copolymer and (b) a photoacid generator.
摘要:
A novel photoacid generator containing a structure of the following formula (I), wherein R is a monovalent organic group with a fluorine content of 50 wt % or less, a nitro group, a cyano group, or a hydrogen atom, and Z1 and Z2 are individually a fluorine atom or a linear or branched perfluoroalkyl group having 1-10 carbon atoms, is provided. When used in a chemically amplified radiation-sensitive resin composition, the photoacid generator exhibits high transparency, comparatively high combustibility, and no bioaccumulation, and produces an acid exhibiting high acidity, high boiling point, moderately short diffusion length in the resist coating, and low dependency to mask pattern density.
摘要:
An onium salt compound having a cation moiety of the following formula (1) is disclosed. wherein A represents I or S, m is 1 or 2, n is 0 or 1, x is 1–10, and Ar1 and Ar2 are (substituted) aromatic hydrocarbon group, and P represents —O—SO2R, —O—S(O)R, or —SO2R, wherein R represents a hydrogen atom, a (substituted) alkyl group, or a (substituted) alicyclic hydrocarbon group. The onium salt compound is suitable as a photoacid generator for photoresists of a positive-tone radiation-sensitive resin composition. The positive-tone radiation-sensitive resin composition containing this compound is useful as a chemically-amplified photoresist exhibiting high resolution at high sensitivity, responsive to various radiations, and having outstanding storage stability.
摘要:
An onium salt compound having a cation moiety of the following formula (1) is disclosed. wherein A represents I or S, m is 1 or 2, n is 0 or 1, x is 1-10, and Ar1 and Ar2 are (substituted) aromatic hydrocarbon group, and P represents —O—SO2R, —O—S(O)R, or —SO2R, wherein R represents a hydrogen atom, a (substituted) alkyl group, or a (substituted) alicyclic hydrocarbon group. The onium salt compound is suitable as a photoacid generator for photoresists of a positive-tone radiation-sensitive resin composition. The positive-tone radiation-sensitive resin composition containing this compound is useful as a chemically-amplified photoresist exhibiting high resolution at high sensitivity, responsive to various radiations, and having outstanding storage stability.
摘要:
A positive tone radiation-sensitive resin composition comprising (A) a 1-substituted imidazole, (B) a photoacid generator, and (C-a) a resin protected by an acid-dissociable group, insoluble or scarcely soluble in alkali, but becoming soluble in alkali when the acid-dissociable group dissociates or (C-b) an alkali-soluble resin and an alkali solubility controller, and a negative tone radiation-sensitive resin composition comprising (A), (B), (D) an alkali-soluble resin, and (E) a compound that can crosslink the alkali-soluble resin in the presence of an acid. The radiation-sensitive resin composition of the present invention is a chemically amplified resist exhibiting high resolution and high storage stability as a composition, and suitable for microfabrication sensible to active radiations, for example, ultraviolet rays such as g-lines and i-lines, deep ultraviolet rays represented by a KrF excimer laser, ArF excimer laser, F2 excimer laser, and EUV excimer laser, and electron beams.
摘要:
The present invention relates to a method for welding comprising the steps of: contacting a plurality of workpieces to be welded having different heat capacities so as to form a boundary portion therebetween; placing a welding electrode in proximity to the boundary portion; generating an arc discharge between the welding electrode and the boundary portion; and supplying gas to the boundary portion, wherein more gas being supplied to one of the workpieces having a lower heat capacity than another workpiece having a higher heat capacity.
摘要:
A fuel rod for a light water reactor comprises a cladding tube which comprises a zirconium alloy having a composition including 0.6 to 2.0% by weight of Nb, 0.5 to 1.5% by weight of Sn, 0.05 to 0.3% by weight of Fe, and the balance being Zr and incidental impurities; uranium oxide fuel pellets packed in the cladding tube; and end plugs closing both ends of the cladding tube. The cladding tube is sealed by TIG welding with the end plugs. Precipitates having grain diameters of 0.01 to 0.5 .mu.m and comprise intermetallic compounds containing Zr, Nb and Fe are present at grain boundaries in the structure of heat affected zones of the cladding tube, the heat affected zone being adjacent to a bead formed by TIG welding.
摘要:
A welding apparatus for welding an end plug on the end of a pellet filled nuclear fuel rod includes a holding mechanism, an abutting member, a torch and a pressing mechanism. The holding mechanism is for holding the external periphery of the fuel rod with the end plug attached thereto. The abutting member is disposed opposite to the holding mechanism, and the end plug of the fuel rod butts up against the abutting member. The torch is disposed between the holding mechanism and the abutting member, and is placed diametrically opposite to the external surface of the fuel rod. The holding mechanism and the abutting member are made so that the distance therebetween can be adjusted, and the pressing mechanism is provided on one of the holding mechanism or the abutting member, and operates to move the holding mechanism and the abutting member to approach each other. In a welding apparatus of such a design, the fuel rod is held by the holding mechanism, and the pressing mechanism pushes the holding mechanism toward the abutting member, and while retaining such a position at a constant compressive force, welding of the end plug is performed. Therefore, the welding is performed without being affected by the variations in the compressive force caused by welding heat distortions, thereby providing a weld of high integrity and quality.