METHOD AND APPARATUS FOR CLEANING WORK PIECES, IN PARTICULAR CIRCUIT BOARDS

A method and apparatus for cleaning work pieces using halogen-free azeotropic cleaning liquids, preferably including alcohols chosen with the nature of the materials to be removed in mind. The pieces are first soaked in and then sprayed with the hot liquid, and then air dired, liquid from the sprayi...

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Bibliographische Detailangaben
Hauptverfasser:	GOEPFERT, SCOTT J, WITTMER, GARY G, PENZEL, WOLFGANG H
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS SPECIALLY ADAPTED THEREFOR CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS CHEMICAL SURFACE TREATMENT CHEMISTRY CINEMATOGRAPHY CLADDING OR PLATING BY SOLDERING OR WELDING CLEANING CLEANING IN GENERAL CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY ELECTROGRAPHY HOLOGRAPHY INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MACHINE TOOLS MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS MATERIALS THEREFOR METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY ORIGINALS THEREFOR PERFORMING OPERATIONS PHOTOGRAPHY PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES PHYSICS PREVENTION OF FOULING IN GENERAL PRINTED CIRCUITS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	A method and apparatus for cleaning work pieces using halogen-free azeotropic cleaning liquids, preferably including alcohols chosen with the nature of the materials to be removed in mind. The pieces are first soaked in and then sprayed with the hot liquid, and then air dired, liquid from the spraying and drying processes being returned to the soaking container, which serves as a source for liquid to a still which in turn provides pure liquid for the spraying step.