Abstract: A silicon etching solution containing an organic alkaline compound and water, the silicon etching solution further containing a compound represented by Formula (1) below, wherein a content of the compound represented by Formula (1) is 100 mass ppm or more: where R1 is a single bond or a hydrocarbon group having carbon number from 1 to 5, R2 and R3 are each independently a hydrogen atom, a halogen atom, a hydroxy group, an amino group, an acetyl group, a carboxy group, a silyl group, a boryl group, a nitrile group, a thio group, a seleno group, or a hydrocarbon group having carbon number from 1 to 10, and these groups optionally further have a substituent.

Abstract: An etching solution has a high etching selectivity of silicon with respect to silicon-germanium and having high stability over time at a treating temperature in surface processing in manufacturing various semiconductor devices, particularly in various silicon composite semiconductor devices containing silicon-germanium. The silicon etching solution contains a compound having at least one carboxy group and having all pKa of 3.5 or more and 13 or less, or a salt thereof; an organic alkali; and water.

Abstract: In etching of a single crystal silicon substrate having a Si crystal plane ((100) plane, (110) plane, and (111) plane) as a main plane, an etching rate on the (110) plane cannot be sufficiently reduced, and there is room for improvement in an etching rate ratio between the (110) plane and the (111) plane. An object of the present invention is to provide a silicon etching solution having excellent crystal plane isotropy in silicon etching and having a high etching selectivity ratio of silicon to a silicon oxide film. The problem is solved by a silicon etching solution containing: an acid group-containing compound having at least one acid group selected from the group consisting of a carboxy group, a sulfonic acid group, a phosphoric acid group, and a phosphonic acid group, and having pKa of 3.5 or more and 13 or less; a quaternary ammonium hydroxide; an oxidizing agent; and water.

Abstract: A silicon etching solution including an aqueous alkaline solution containing a hypohalite ion in a range of 0.05 mmol/L or greater and 5 mmol/L or less and having a pH of 12.5 or greater at 24° C.

Abstract: There is provided a polyester resin including a 2,5-furandicarboxylic acid unit and a cyclohexanedimethanol unit in a main chain, in which the polyester resin is high in molecular weight, has heat resistance and hydrolysis resistance, and is excellent in mechanical properties and melt heat stability. There is also provided a method for producing a polyester resin having the above characteristics. A polyester resin including a 2,5-furandicarboxylic acid unit and a 1,4-cyclohexanedimethanol unit as main constituent components, wherein the following (I) and (II) are satisfied: (I) the reduced viscosity (?sp/c) is 0.7 dL/g or more; and (II) the sum of a cyclovinylidene terminal and a methylcyclohexene terminal is 80 ?eq/g or less.

Abstract: There is provided a polyester resin including a 2,5-furandicarboxylic acid unit and a cyclohexanedimethanol unit in a main chain, in which the polyester resin is high in molecular weight, has heat resistance and hydrolysis resistance, and is excellent in mechanical properties and melt heat stability. There is also provided a method for producing a polyester resin having the above characteristics. A polyester resin including a 2,5-furandicarboxylic acid unit and a 1,4-cyclohexanedimethanol unit as main constituent components, wherein the following (I) and (II) are satisfied: (I) the reduced viscosity (?sp/c) is 0.7 dL/g or more; and (II) the sum of a cyclovinylidene terminal and a methylcyclohexene terminal is 80 ?eq/g or less.

Abstract: There is provided a polyester resin including a 2,5-furandicarboxylic acid unit and a cyclohexanedimethanol unit in a main chain, in which the polyester resin is high in molecular weight, has heat resistance and hydrolysis resistance, and is excellent in mechanical properties and melt heat stability. There is also provided a method for producing a polyester resin having the above characteristics. A polyester resin including a 2,5-furandicarboxylic acid unit and a 1,4-cyclohexanedimethanol unit as main constituent components, wherein the following (I) and (II) are satisfied: (I) the reduced viscosity (?sp/c) is 0.7 dL/g or more; and (II) the sum of a cyclovinylidene terminal and a methylcyclohexene terminal is 80 ?eq/g or less.

Abstract: To provide a polycarbonate resin composition excellent in surface hardness and impact strength. A polycarbonate resin composition comprising at least a polycarbonate resin (a) and a polycarbonate resin (b) having structural units different from the polycarbonate resin (a), which satisfies the requirements: (i) the pencil hardness of the polycarbonate resin (a) as specified by ISO15184 is higher than the pencil hardness of the polycarbonate resin (b) as specified by ISO15184; (ii) the weight ratio of the polycarbonate resin (a) to the polycarbonate resin (b) in the polycarbonate resin is from 1:99 to 45:55; (iii) the pencil hardness of the polycarbonate resin composition as specified by ISO15184 is higher by at least two ranks than the pencil hardness of the polycarbonate resin (b) as specified by ISO15184; and (iv) the Charpy impact strength of the polycarbonate resin composition is higher than the Charpy impact strength of the polycarbonate resin (a).

Abstract: To provide a polycarbonate resin composition excellent in the surface hardness, the heat resistance, the moldability and the flame retardancy. A polycarbonate resin composition comprising at least a polycarbonate resin (a) and a polycarbonate resin (b) having structural units different from the polycarbonate resin (a), which satisfies the following requirements: (i) the pencil hardness of the polycarbonate resin (a) as specified by ISO 15184 is higher than the pencil hardness of the polycarbonate resin (b) as specified by ISO 15184; (ii) the glass transition point Tg(a) of the polycarbonate resin (a) and the glass transition point Tg(b) of the polycarbonate resin (b) satisfy the relation of the following (Formula 1): Tg(b)?45° C. <Tg(a)<Tg(b)?10° C.??(Formula 1): and (iii) the pencil hardness of the polycarbonate resin composition as specified by ISO 15184 is higher by at least two ranks than the pencil hardness of the polycarbonate resin (b) as specified by ISO 15184.

Abstract: To provide a polycarbonate resin laminate having the surface hardness remarkably improved and being excellent in color and impact resistance.

Abstract: To provide a polycarbonate resin composition excellent in the surface hardness, the heat resistance, the moldability and the flame retardancy. A polycarbonate resin composition comprising at least a polycarbonate resin (a) and a polycarbonate resin (b) having structural units different from the polycarbonate resin (a), which satisfies the following requirements: (i) the pencil hardness of the polycarbonate resin (a) as specified by ISO 15184 is higher than the pencil hardness of the polycarbonate resin (b) as specified by ISO 15184; (ii) the glass transition point Tg(a) of the polycarbonate resin (a) and the glass transition point Tg(b) of the polycarbonate resin (b) satisfy the relation of the following (Formula 1): Tg(b)?45° C.<Tg(a)<Tg(b)?10° C.??(Formula 1) and (iii) the pencil hardness of the polycarbonate resin composition as specified by ISO 15184 is higher by at least two ranks than the pencil hardness of the polycarbonate resin (b) as specified by ISO 15184.

Abstract: The present invention relates to a polycarbonate resin having, in the molecule, at least a structural unit represented by the following formula (1), wherein the terminal hydroxyl group concentration of the polycarbonate resin is 300 ppm or less: wherein each of R1 and R2 independently represents a substituted or unsubstituted alkyl group having a carbon number of 1 to 20 or a substituted or unsubstituted aryl group, and X represents a single bond, a carbonyl group, a substituted or unsubstituted alkylidene group, a substituted or unsubstituted sulfur atom, or an oxygen atom.

Abstract: The present invention relates to a polycarbonate resin having, in the molecule, at least a structural unit represented by the following formula (1), wherein the terminal hydroxyl group concentration of the polycarbonate resin is 300 ppm or less: wherein each of R1 and R2 independently represents a substituted or unsubstituted alkyl group having a carbon number of 1 to 20 or a substituted or unsubstituted aryl group, and X represents a single bond, a carbonyl group, a substituted or unsubstituted alkylidene group, a substituted or unsubstituted sulfur atom, or an oxygen atom.

Abstract: To provide a polycarbonate resin laminate having the surface hardness remarkably improved and being excellent in color and impact resistance.

Abstract: To provide a polycarbonate resin composition excellent in the surface hardness, the heat resistance, the moldability and the flame retardancy. A polycarbonate resin composition comprising at least a polycarbonate resin (a) and a polycarbonate resin (b) having structural units different from the polycarbonate resin (a), which satisfies the following requirements: (i) the pencil hardness of the polycarbonate resin (a) as specified by ISO 15184 is higher than the pencil hardness of the polycarbonate resin (b) as specified by ISO 15184; (ii) the glass transition point Tg(a) of the polycarbonate resin (a) and the glass transition point Tg(b) of the polycarbonate resin (b) satisfy the relation of the following (Formula 1): Tg(b)?45° C.<Tg(a)<Tg(b)?10° C.??(Formula 1) (iii) the pencil hardness of the polycarbonate resin composition as specified by ISO 15184 is higher by at least two ranks than the pencil hardness of the polycarbonate resin (b) as specified by ISO 15184.

Abstract: To provide a polycarbonate resin composition excellent in the surface hardness, the heat resistance, the moldability and the flame retardancy. A polycarbonate resin composition comprising at least a polycarbonate resin (a) and a polycarbonate resin (b) having structural units different from the polycarbonate resin (a), which satisfies the following requirements: (i) the pencil hardness of the polycarbonate resin (a) as specified by ISO 15184 is higher than the pencil hardness of the polycarbonate resin (b) as specified by ISO 15184; (ii) the glass transition point Tg(a) of the polycarbonate resin (a) and the glass transition point Tg(b) of the polycarbonate resin (b) satisfy the relation of the following (Formula 1): Tg(b)?45° C.<Tg(a)<Tg(b)?10° C.??(Formula 1) and (iii) the pencil hardness of the polycarbonate resin composition as specified by ISO 15184 is higher by at least two ranks than the pencil hardness of the polycarbonate resin (b) as specified by ISO 15184.

Abstract: To provide a polycarbonate resin composition excellent in surface hardness and impact strength. A polycarbonate resin composition comprising at least a polycarbonate resin (a) and a polycarbonate resin (b) having structural units different from the polycarbonate resin (a), which satisfies the requirements: (i) the pencil hardness of the polycarbonate resin (a) as specified by ISO15184 is higher than the pencil hardness of the polycarbonate resin (b) as specified by ISO15184; (ii) the weight ratio of the polycarbonate resin (a) to the polycarbonate resin (b) in the polycarbonate resin is from 1:99 to 45:55; (iii) the pencil hardness of the polycarbonate resin composition as specified by ISO15184 is higher by at least two ranks than the pencil hardness of the polycarbonate resin (b) as specified by ISO15184; and (iv) the Charpy impact strength of the polycarbonate resin composition is higher than the Charpy impact strength of the polycarbonate resin (a).

Abstract: A polyamide resin comprising a dicarboxylic acid constitutional unit comprising an adipic acid unit and a diamine constitutional unit comprising a pentamethylenediamine unit and a hexamethylenediamine unit wherein a weight ratio of the pentamethylenediamine unit to the hexamethylenediamine unit being in the range of 95:5 to 60:40; a vibration-welded molded product having an excellent vibration welding strength, a hinged molded product and a binding band having an excellent low-temperature toughness, and a filament having an excellent transparency which are obtained from the polyamide resin; and a hinged molded product comprising a polyamide resin constituted of an adipic acid unit and a pentamethylenediamine unit.

Abstract: To provide a polyamide resin excellent in lasting thermal stability and having a high biomass ratio. A polyamide resin comprising adipic acid units, pentamethylenediamine units and 6-aminocaproic acid units as constituents, wherein the weight ratio of the sum of the adipic acid units and the pentamethylenediamine units to the 6-aminocaproic acid units is 97:3 to 75:25. The pentamethylenediamine is preferably one produced from lysine using lysine decarboxylase, lysine decarboxylase-producing cells or a treated product of the cells.

Abstract: A polyamide resin comprising a dicarboxylic acid constitutional unit comprising an adipic acid unit and a diamine constitutional unit comprising a pentamethylenediamine unit and a hexamethylenediamine unit wherein a weight ratio of the pentamethylenediamine unit to the hexamethylenediamine unit being in the range of 95:5 to 60:40; a vibration-welded molded product having an excellent vibration welding strength, a hinged molded product and a binding band having an excellent low-temperature toughness, and a filament having an excellent transparency which are obtained from the polyamide resin; and a hinged molded product comprising a polyamide resin constituted of an adipic acid unit and a pentamethylenediamine unit.