TECHNET Archives

March 2010

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Brian Ellis <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Brian Ellis <[log in to unmask]>
Date:
Tue, 16 Mar 2010 17:34:32 +0200
Content-Type:
text/plain
Parts/Attachments:
text/plain (85 lines)
This is best one of those cases where you should suck it and see!  As 
you are using water-soluble fluxes throughout, try washing one board or 
a few of them and then do a simple ionic contamination test to see how 
much flux residue is left.  If it is negligible, then you should be 
okay; in other words the residues from all the operations will have been 
removed.

You may find it better to use some form of washing aid than pure water 
for the first stage of the wash, just to give it a better chance. 
However, I would very seriously consult your flux supplier and obtain 
his advice, as he is more likely to know whether there are any 
components in his products that may cause problems, especially chemicals 
that may react with each other in the various stages.

Brian

Ioan Tempea wrote:
> 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.
> Ing�nieur 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 n�cessaire - Print only if you must
> 
>  
> 
> 
> ______________________________________________________________________
> This email has been scanned by the MessageLabs Email Security System.
> For more information please contact helpdesk at x2960 or [log in to unmask] 
> ______________________________________________________________________
> 
> ---------------------------------------------------
> Technet Mail List provided as a service by IPC using LISTSERV 15.0
> To unsubscribe, send a message to [log in to unmask] with following text in
> the BODY (NOT the subject field): SIGNOFF Technet
> To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
> To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
> Search the archives of previous posts at: http://listserv.ipc.org/archives
> Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
> -----------------------------------------------------
> 


______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------

ATOM RSS1 RSS2