Preparation of dry ice aerosol
    2.
    发明专利

    公开(公告)号:JP4812986B2

    公开(公告)日:2011-11-09

    申请号:JP2001253166

    申请日:2001-08-23

    Abstract: PROBLEM TO BE SOLVED: To provide a method for producing dry ice aerosol, by which high hardness dry ice particles of a micrometer order or lower can be produced, which has no possibility of inclusi on of impurities, and is suitable for cleaning the surface of a semiconductor wafer or the like. SOLUTION: A liquefied carbon dioxide gas is evacuated so as to be a gas- liquid mixed state, and is thereafter jetted to the inside of a nozzle 3. Further, gaseous nitrogen is jetted to the inside of the nozzle 3 at a high speed, and the liquefied carbon dioxide gas and carbon dioxide gas in a gas-liquid mixed state are cooled by the cold of the gaseous nitrogen to produce aerosol with the gaseous nitrogen as a dispersion medium and dry ice particles as a dispersion phase. Further, the aerosol is jetted from the nozzle 3 by the jet flow of the gaseous nitrogen.

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