Hello TechNet,

I am looking for peer perspective on conformal coating coverage of CCA's
and components.

We currently are spraying Humiseal 1B31 manually from four directions.
We have recently been requested to guarantee coverage under all
components.
Historically there has been debate on the degree of coverage under
certain components - examples include
 large pin grid arrays, large potted transformers, and I suspect even
BGA components.
Even the insides of DIP leads (mounted on heatsinks) have been
questioned in the past.

Has anyone investigated coverage on these types of parts and / or does
anyone have
experiences with dip coating 1B31, either as an initial coat before
spray coating or as a
full coating?

Hearing of your experiences would be much appreciated.

Best regards,


Ken Devitt  973-284-3880
Manufacturing Engineering
ITT Avionics
Clifton, NJ

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