WATER SOLUBLE FORMULATION FOR MASKING AND THE LIKE, AND METHOD UTILIZING THE SAME

A water-soluble coating or other deposit is produced from a formulation that is comprised of a curable liquid substance and a dispersed particulate effervescing agent. The formulation is particularly useful as a solder resist in the manufacture of PCBs, and the preferred composition contains n-vinyl...

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Bibliographische Detailangaben
Hauptverfasser:	BACHMANN, ANDREW G, GROSCLAUDE, GARY V
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES APPARATUS SPECIALLY ADAPTED THEREFOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS CHEMICAL PAINT OR INK REMOVERS CHEMISTRY CINEMATOGRAPHY CLADDING OR PLATING BY SOLDERING OR WELDING COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING DYES ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY ELECTROGRAPHY FILLING PASTES HOLOGRAPHY INKS MACHINE TOOLS MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS MATERIALS THEREFOR METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORIGINALS THEREFOR PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS PHOTOGRAPHY PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES PHYSICS POLISHES PRINTED CIRCUITS PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SOLDERING OR UNSOLDERING SPRAYING OR ATOMISING IN GENERAL TRANSPORTING USE OF MATERIALS THEREFOR WELDING WOODSTAINS WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	A water-soluble coating or other deposit is produced from a formulation that is comprised of a curable liquid substance and a dispersed particulate effervescing agent. The formulation is particularly useful as a solder resist in the manufacture of PCBs, and the preferred composition contains n-vinyl-2-pyrrolidone, N,N-dimethylacrylamide, and polyvinylpyrrolidone.