Matte tin plating brighteners

METASU FSM-42A/B is a matte tin plating brightener developed for use on a lead-free plated film.

・Superior bath stability during operation.
・Homogeneous characteristics with little change in color and evenness can be obtained after reflow.

Product specifications

Usage conditions (standard)

Item Bath makeup concentration Concentration for monitoring
Organization METASU AM 90 ml/L 80-200 ml/L
METASU SM-2 250 ml/L
(Sn :50 g/L)
Sn:30-80 g/L
METASU FSM-42A 40 ml/L 20-60 ml/L
METASU FSM-42B 20 ml/L 10-30 ml/L
Condition Bath temperature 35℃ (30-40℃)
Electric current density 3-15 ASD
Anode High purity tin (99.99% and above is recommended)
Agitation Pump circulation, material set in motion
Filtration Continuous filtration by filter with thickness 1-5um

* Conditions can be set accordingly to match the usage method.

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