Hi Ioan,

We do this with 1 restriction.  No more than 24 hrs from first reflow to wash.  We only have a few boards that can meet that schedule but these are run that way.  
Other boards get a 2 step wash.  1 after SMT (top and bottom) and 1 after manual soldering.  Same limits of 24 hrs between reflow and wash or wave and wash.

Jerry Dengler
Production Manager
Pergamon Corporation


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ioan Tempea
Sent: Tuesday, March 16, 2010 10:06 AM
To: [log in to unmask]
Subject: [TN] Eliminating interemediate washes

Dear Technos,

 

Is it doable to wash a mixed technology board ( SMT + TH) only at the end of TH?

 

I mean instead of repeatedly washing (SMT first side-wash, SMT second side-wash, TH-wash, manual soldering-wash) adopting a one wash strategy (SMT first side-no wash, SMT second side-no-wash, TH-no wash, manual soldering-wash). TH might not be done in the same day as SMT, but no later than next day and boards washed within 3 hours after wave soldering.

 

Is anybody in the industry doing this?

 

Pros and cons?

 

Thanks,

 

Ioan Tempea, ing.
Ingénieur Principal de Fabrication / Senior Manufacturing Engineer T | 450.967.7100 ext.244 E | [log in to unmask] <mailto:[log in to unmask]> W | www.digico.cc <http://www.digico.cc/> 

 
 N'imprimer que si nécessaire - Print only if you must

 


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