I believe you can simply eliminate the salt, if you are using the correct flux, and insure that the Tin is kept as dross-free as possible.   Also important is to move the panels from the microetch preceding the process, through the process directly, with no hold times, to insure that there is no tarnish on the board when it contacts the Tin.

Rudy Sedlak
RD Chemical Company

Baski Devre <[log in to unmask]> wrote: Dear Technetters
As you know that some PCB manufacturer uses roller tinning soldering
process. In this process firstly flux is spread over PCB and then passed
through rollers to be soldered. In this solder alloy sometimes a bit
salt is added to improve soldering quality and help solder to be appread
bright. I want to learn that if there is any alternative material used
in roller tinning soldering process to elaminate salt or is there any
alternative roller tinning soldering process flow.
Thanks in advance to your comments and knowledge share
Best Regards

--
Yusuf GÖMEÇ
Product Quality Engineer


BASKI DEVRE SAN ve TIC LTD STI
Ceyhan Sk. No:10 34896 Pendik-Istanbul-Turkey
Tel: 00 90 216 3901036 (4 Hat/Line)-173(Extention)
     00 90 216 4836560 (4 Hat/Line)-173(Extention)
Fax: 00 90 216 3544941
     00 90 216 4913269
Gsm: 00 90 533 6579897
     00 90 533 7480014
msn: [log in to unmask]

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