| 摘要 |
AQUEOUS SOLUTION AND METHOD FOR REMOVING IONIC CONTAMINANTS FROM THE SURFACE OF A WORKPIECE TO REDUCE IONIC CONTAMINANTS ON PRINTED CIRCUIT BOAUDS THAT ARE AT LEAST PARTIALLY 5 COVERED WITH A SOLDER RESIST MASK AND ARE PROVIDED WITH TOP LAYERS ON THE COPPER STRUCTURES, AN AQUCOLIS CLEANIII., SOLUTION IS USED, WHICH CONTAINS AT LEAST ONE ETHARIOLAMINE COMPOUND AND/OR THE SALT THEREOF, AT LEAST ONE ALCOHOLIC SOLVENT AND, AT NEED, AT LEAST ONE GUANIDINE C0111110LIND AND/OR (LIE SALT THEREOC
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