Gregory S Bartlett wrote:
>
> Hello,
>
> A general question:
>
> How are people ensuring that a laser drilled microvia has no remaining
> resin on the innerlayer copper target pad prior to metallization?
>
> Many thanks in advance!
>
> Greg Bartlett
> Teledyne Electronic Technologies
> Hudson, NH
> [log in to unmask]
>
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> ################################################################Hi Greg,
Depending on the resin system, a permanganate desmear cycle should work.
You  may have to make some adjustments in the actual dwell times,
concentrtations and temperatures.

Good luck.

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