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| Reply To: | TechNet E-Mail Forum. |
| Date: | Wed, 30 Jan 2002 09:04:36 -0800 |
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It says "no clean" and therefore one would think that you do not have to clean it. The IPC standards says that residue from no clean fluxes are acceptable provided it has been qualified and documented by your process engineer as benign. It has been my
experience that some "no clean" fluxes have corrosion issues. If I were you I would do some ionic testing. Check out IPC -TM-650 for test procedures. You might also check the chemical content of the flux you're using. If it contains halides then you
most likely have a problem. Good luck!
Dyane White
Technical/Process Trainer
Philips Ultrasound
Bothell, WA
Olivia Mc Dermott
<oliviamcdermott01@HO To: [log in to unmask]
TMAIL.COM> cc: (bcc: Dyane White/ATL-BTL/MS/PHILIPS)
Sent by: TechNet Subject: [TN] Flux residue with a no-clean process
<[log in to unmask]>
Classification:
01/30/02 05:48 AM
Please respond to
"TechNet E-Mail
Forum."; Please
respond to Olivia Mc
Dermott
Is it OK to have flux residue on assemblies when the process is no clean. We
have assemblies that are failing in the field and the customer thinks this
flux residue may be an issue. They think the assembly has been wet.
What do you think???? All help appreciated.
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