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January 2000

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Subject:
From:
Gary Camac <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 10 Jan 2000 09:00:11 -0600
Content-Type:
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Good morning everyone,

We are seeing a film on some circuit board assemblies after
a pass through our in-line cleaner.

We are using an RA flux and a soaponifier in the cleaner.
The film is only showing up on boards that have a high gloss
LPI mask.
Multiple passes through the cleaner will not remove the
film.
The film can be easily wiped off with a dry wipe.
The film can be cleaned off brushing with isopropyl alcohol
The pattern of the film is an image of the flux residue that
was on the board prior to cleaning.

Any ideas as to what is going on.

Thanks in Advance,
Gary Camac

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