Abstract: The present disclosure relates to an etching composition for a silicon nitride layer, and the etching composition for a silicon nitride layer has a significantly excellent etching selectivity for a silicon nitride layer as compared to a silicon oxide layer, prevent abnormal growth of the silicon oxide layer, suppresses particle generation affecting characteristics of a semiconductor device, and has an excellent effect of a significantly small generation height of bubbles.

Abstract: The present invention relates to a composition for electroless platinum plating and an electroless platinum plating method using the same, wherein it is possible to easily and safely produce a uniformly dispersed platinum thin film without expensive additional equipment by performing electroless platinum plating with a composition for electroless platinum plating containing an alcohol, an aqueous solution of a platinum chloride compound, and an aqueous solution of a basic compound.

Abstract: The present invention relates to a composition for electroless platinum plating and an electroless platinum plating method using the same, wherein it is possible to easily and safely produce a uniformly dispersed platinum thin film without expensive additional equipment by performing electroless platinum plating with a composition for electroless platinum plating containing an alcohol, an aqueous solution of a platinum chloride compound, and an aqueous solution of a basic compound.

Abstract: This invention relates to an apparatus and method for cleaning a photomask. This apparatus, suitable for use in removing an adhesive residue from a photomask, includes a photomask disposed such that a surface thereof on which an adhesive residue is left behind is directed downwards, a metal plate formed adjacent to the adhesive residue, and a laser generator for irradiating a laser onto the metal plate so that the adhesive residue is removed by heat generated from the metal plate.

Abstract: This invention relates to an apparatus and method for cleaning a photomask. This apparatus, suitable for use in removing an adhesive residue from a photomask, includes a photomask disposed such that a surface thereof on which an adhesive residue is left behind is directed downwards, a metal plate formed adjacent to the adhesive residue, and a laser generator for irradiating a laser onto the metal plate so that the adhesive residue is removed by heat generated from the metal plate.

Abstract: The present invention relates to a laser transmitter for simulation training, which is mounted on a firearm. The laser transmitter for simulation training includes an infrared laser diode 21 configured to emit an infrared laser beam, a laser beam shaping lens 22 disposed in the direction of travel of the laser beam of the infrared laser diode, a dichroic beam splitter 23 disposed in the direction of travel of the laser beam of the infrared laser diode and configured to have a first face 23a for transmitting an infrared laser beam and a second face 23b for reflecting a visible laser beam, a visible laser diode 31 configured to emit a visible laser beam and disposed at a position where the visible laser beam is refracted by the second face, and a focusing lens disposed in the direction of travel of the visible laser beam.

Abstract: An apparatus and a method for manufacturing molten pig iron by using a fine iron ore are disclosed. Coal is used to produce a reducing gas, and a fine iron ore is used to produce a molten iron and a reduced iron in a simple and efficient manner. The apparatus for manufacturing a molten iron by directly using coal as the fuel is as follows. A high temperature reducing gas is sent from a melter-gasifier to a fluidized bed lime stone calcining furnace to calcine the lime stone. The reducing gas is supplied to a second fluidized bed reducing furnace so as to manufacture a reduced iron directly. An off-gas from the second fluidized bed reducing furnace is supplied to a first fluidized bed reducing furnace (disposed above the second fluidized bed reducing furnace) to pre-heat and pre-reduce the fine iron ore. The calcined lime stone and the finally reduced iron are supplied to a melter-gasifier to manufacture a molten pig iron.

Abstract: Disclosed is a method for increasing the charring ratio of coal. In manufacturing an ingot iron using the coal, magnesium oxide or limestone is used as an additive for charring the coal. The additive increases the charring ratio of the coal while giving no affection onto slag. An MgO suspension or limestone suspension is mixed with the coal and thus obtained mixture is dried to attach MgO or the limestone onto the surface of the coal. The charring effect is increased and the using amount of coke can be reduced.

Abstract: A smelting reduction apparatus and a method for producing molten pig iron using the smelting reduction apparatus are disclosed. The molten pig iron is produced by using iron ore, sintered ore or iron pellets, so that the reduced iron discharge operation from a pre-reducing furnace to a melter-gasifier would not give any influence to the operation of the pre-reducing furnace. An iron ore is pre-reduced at a pre-reducing furnace by utilizing a reducing off-gas which is produced from a melter-gasifier. The pre-reduced iron ore is melted and reduced at the melter-gasifier. The reducing gas which is discharged from the melter-gasifier is supplied through an ascending duct and a cyclone into the pre-reducing furnace. The fine iron ore which is collected at the cyclone is spouted through a recycling device and a melter-burner into the melter-gasifier.

Abstract: A method for manufacturing coal agglomerates for use in a direct smelting reducing furnace is disclosed, in which a fine coal is agglomerated at a high temperature in a simple manner, or anthracite or low free swelling coal having a low free swelling index is mixed with the fine coal, and the mixture is agglomerated at a high temperature, thereby turning the low quality coal to useful purpose. The present invention is characterized in that a fine coal having a free swelling index of 3.0 or more and a particle size of 8 mm or less, or the fine coal mixed with 70 weight % of anthracite or a low free swelling coal, is maintained at 600.degree. C. or over for 5 minutes or more, thereby manufacturing coal agglomerates for use in a direct smelting reducing furnace.