NOVELTY - A semiconductor device-manufacturing apparatus (100) has a synthesizing apparatus (10) which synthesizes hydrogen cyanide formed by reacting ammonia gas with methane gas or methanol gas using non-alkaline fiber raw material containing platinum, silver, copper, nickel, palladium and/or gold, a dissolving apparatus (20) which sets pH value of cyanide-ion containing solution to 8-10.5, a semiconductor processing tank (30) and a flow path through which the hydrogen cyanide or cyanide-ion containing solution passes.    USE - Apparatus is used for manufacturing semiconductor device (claimed) e.g. solar cell, thin-film transistor, metal-oxide semiconductor device and charge-coupled device.    ADVANTAGE - The apparatus manufactures semiconductor device with high yield, without environmental pollution.    DETAILED DESCRIPTION - A semiconductor device-manufacturing apparatus has a synthesizing apparatus which synthesizes hydrogen cyanide formed by reacting ammonia gas with methane gas or methanol gas using non-alkaline fiber raw material containing platinum, silver, copper, nickel, palladium and/or gold, a dissolving apparatus which sets pH value of cyanide-ion containing solution to 8-10.5 during production of cyanide-ion containing solution by dissolving water or methanol as solvent, a semiconductor processing tank which immerses a semiconductor layer or a semiconductor substrate in the cyanide-ion containing solution with which pH value is adjusted, and a flow path through which the hydrogen cyanide or cyanide-ion containing solution passes and which was interrupted from external air and is formed between the synthesizing apparatus and the dissolving apparatus, and between the dissolving apparatus and the semiconductor processing tank. An INDEPENDENT CLAIM is included for manufacture of semiconductor device.    DESCRIPTION OF DRAWING(S) - The drawing shows the block diagram of apparatus for manufacturing semiconductor device.    Synthesizing apparatus (10)    Dissolving apparatus (20)    Cyanide ion-c solution (21)    Semiconductor processing tank (30)    Semiconductor device-manufacturing apparatus (100)