PROBLEM TO BE SOLVED: To eliminate defective products caused by return shower and also to enable to use a low volatile organic solvent (LOVC) flux being friendly to environment. ;SOLUTION: In a spray fluxer device for applying a liquid flux on a material P to be coated by spraying the liquid flux, a louver like primary filter 4 having plural vanes 5 each inclined in the same direction and arranged in an oblique direction so that each end part is laid to face downward to overlap each other in a prescribed range in the vertical direction is provided.;COPYRIGHT: (C)2000,JPO
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