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January 2002

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Wed, 30 Jan 2002 10:01:32 -0600
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Is it OK to have flux residue on assemblies when the process is no clean.

*That depends entirely on what flux you are using, the amount of flux your
are applying, and the reflow profile you are using. I suggest you get a
copy of IPC-TP-1115, that goes over the things you need to think about when
transitioning to no-clean assembly.  Flux is one of the considerations.

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 is the failure mechanism?  How many assemblies are affected?  What
does your customer mean by "wet"?

What do you think????

*I think we need more information.

Doug Pauls
Rockwell Collins

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