Have no idea what strange things you are doing, but an easy way to activate
the copper is to dip the boards in a weak acid solution, strength depending
on the time the boards have been exposed to the atmosphere. Rinse rigorously
in DI !
/Inge

-----Ursprungligt meddelande-----
Från: TechNet [mailto:[log in to unmask]] För Ioan Tempea
Skickat: den 19 mars 2008 13:42
Till: [log in to unmask]
Ämne: [TN] Shelf lif of bare copper boards

Dear Technos,

 

Anybody using PCbs with bare copper pads and traces, no plating, no OSP,
not even solder mask? Because I have a few questions:

 

What is their shelf life?

Are they suited for double side SMT reflow? I mean, during the first
reflow the oxidizing is accelerated...

What storing/handling procedures you use?

Does the copper require any particular specifications, in order to
perform better in soldering?

Anything else?

 

Thank you,

 

Ioan

 


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