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Date: | Tue, 20 Mar 2018 15:30:33 -0500 |
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Hi Rich - as part of the IPC-JSTD-001 Conformal Coating Coverage/Thickness
"State of the Industry" Assessment task group efforts, we reviewed the
available conformal coating measurement/inspection equipment in an effort
to make our measurement tasks consistent and repeatable. We were unable to
identify any system that could make the conformal coating
thickness/coverage measurements we wanted so we resorted to using
metallographic cross-section techniques (very slow but accurate). That was
three years ago so hopefully a new system exists that can meet your needs.
Dave Hillman
Rockwell Collins
[log in to unmask]
On Tue, Mar 20, 2018 at 11:00 AM, Richard Kraszewski <
[log in to unmask]> wrote:
> Several years back we had run-off for AOI equipment to inspect for
> coating defects. Had 2 equipment providers bring equipment on site and
> worked with them for several weeks.
> The results were rather disappointing in that neither was reliable
> enough to replace an human inspector.
> Seemed like the defects that the systems could collect needed to be
> rather gross and obvious.
> Could not reliably identify those smaller scale defects (bubbles between
> leads, FOD, thick fillets, etc.) that class 3 customers seemed to also care
> about.
>
> Would appreciate any supporting or contradicting experiences anyone is
> willing to share.
>
> Thanks
>
> Rich Kraszewski
> Senior Staff Process Engineer
> Plexus
>
>
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