Vacuum cycle nucleation (VCN) is an immersion cleaning and extraction process which takes place in a sealed processing chamber. The pressure in the chamber is lowered and raised at and below the vapor pressure of the heated cleaning liquid.

When the vapor pressure is reached, vapor bubbles are formed on the solid surface and these bubbles collapse and exit the bulk fluid. As they exit, they carry the particles and solubilized material to be removed. This vacuum pressure cycle is repeated every two seconds until the desired cleanliness is achieved. VCN cleaning is followed by a VCN water rinse and vacuum drying.

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