Sorry to bust in with a "real" question....

Has anyone experience with using the black oxide replacement chemistry as a
pre-clean for dry film soldermask? The mask is Dupont Vacryl(sp?). The
chemistries are usually refered to as alternative etch or differential etch
as generic terms. Vendors offer Cobrabond and Bondfilm and Multibond as
process names.

I have experience using these chemistries with Liquid photoimagable
soldermasks, but the dry stuff is not in my toolkit.

Thanks in advance,

Russ

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