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Subject:
From:
Joyce Koo <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Joyce Koo <[log in to unmask]>
Date:
Thu, 19 May 2011 16:39:02 -0400
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Not OK. Unless those are solder balls does not reduce electrical clearance and you are not operating at microwave, and you have no issue with dielectric and not close to RF , etc.   Since you can not control, it better just say no at all.   My 2 cents.
                          jk

________________________________
From: [log in to unmask] [mailto:[log in to unmask]]
Sent: Thursday, May 19, 2011 4:30 PM
To: TechNet E-Mail Forum; Joyce Koo
Subject: Re: [TN] Conformal Coating and FOD


Which means what?  non-metallic FOD is OK no matter where it occurs?

Doug Pauls

Joyce Koo <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>

05/19/2011 02:04 PM
Please respond to
TechNet E-Mail Forum <[log in to unmask]>; Please respond to
Joyce Koo <[log in to unmask]>


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<[log in to unmask]>

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Subject

Re: [TN] Conformal Coating and FOD










Non metallic

--------------------------
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----- Original Message -----
From: Douglas Pauls [mailto:[log in to unmask]]
Sent: Thursday, May 19, 2011 03:03 PM
To: [log in to unmask] <[log in to unmask]>
Subject: [TN] Conformal Coating and FOD

Good afternoon all,

I have an interesting question to pose to the forum.  An internal debate
presently rages internally, so I thought I would turn to cool rational
people (sit down Dewey).

When inspecting conformal coating, one of the things that "may" be
considered a defect is the presence of Foreign Objects and Debris (FOD),
which "might" require disposition.

1.  Is there any guidelines you all use to differentiate FOD in coating
that requires action (e.g. FOD as a defect), vs. FOD that does not
(cosmetic only)?
2.  If you differentiate bad FOD from doesn't-matter FOD, what criteria do
you use?

In essence, how much FOD is FOD.

Thanks.

Doug Pauls

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