Methods for drying and cleaning of objects using aerosols and in

Details Methods for drying and cleaning of objects using aerosols and in Methods for drying and cleaning of objects using aerosols and in

1998-06-04

1999-10-19

Warden, Jill

Cleaning and liquid contact with solids

Processes

Using sequentially applied treating agents

134 21, 134 30, 134 31, 134 952, 134 953, 134902, 34340, 34342, 34401, B08B 304

Patent

active

059682850

ABSTRACT:
Methods for cleaning and/or drying objects that may have been wetted or contaminated in a manufacturing process. The objects are submerged in a rinse liquid in an enclosed chamber, and aerosol particles from a selected liquid are introduced into the chamber above the rinse liquid surface, forming a thin film on this surface. As the rinse liquid is slowly drained, some aerosol particles settle onto the exposed surfaces of the objects, and displace and remove rinse liquid residues from the exposed surfaces, possibly by a "chemical squeegeeing" effect. Surface contaminants are also removed by this process which may be performed at about room temperature. Chamber pressure is maintained at or near the external environment pressure as the rinse liquid is drained from the chamber. Inert gas flow is employed to provide aerosol particles of smaller size and/or with greater dispersion within the chamber. Continuous filtering and shunt filtering are employed to remove most contaminants from the selected liquid. A flow deflector redirects initial flow of the selected liquid to a supplementary filter, to remove most of the contaminant particle "spike" that appears when a system is first (re)activated. An improved surface for aerosol particle production is provided.

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