I guess I don't fully understand.  If you need to pass ionic cleanliness
testing, than you need to pass.  That includes the components used, not just
the joints you made.  Ionics are detrimental on the PCB and on the
components- no discrimination there.  I would either pre-clean the
components or find different supplier.  If neither are feasible, you would
need to do some sort of investigation with IC testing and/or SIR testing to
prove the residues are not detrimental, wherever they may lie. Then if
validated by that testing, you could put in the documentation that the P/F
limit is higher, just so long as you have the data behind it.  The Rockwell
Gang or P.A.L pals might have a valid opinion here...

Kevin Glidden
Manufacturing Engineer
Astronics Luminescent Systems Inc.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bloomquist, Ken
Sent: Thursday, November 30, 2006 3:45 PM
To: [log in to unmask]
Subject: Re: [TN] Question about J-STD-001 cleanliness designator C-22

Along the same lines, sort of. If you use COTS magnetics and the supplier
changes to no-clean and after assembly you put that in your ROSE tester the
readings can go through the roof.

If you are satisfied that the mag manufacturer is doing everything right and
you can live with no-clean flux on the mag, how do you perform a ROSE test
on the assembly and trust the reading?

Thanks,

KennyB

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