Rudy's right.  DI rinse would be expensive and meaningless from my work experience with innerlayer preclean.

  Yu-Shan Han, PE
  Lead One Technology


R Sedlak <[log in to unmask]> wrote:
  Frank: Unclear if I qualify as an "expert", but I have seen the workings of many many PCB shops...
And a DI rinse after innerlayer chemclean is essentially never done... with this caveat, it could have something to do with the quality of your tap water..
However, if you DI rinse at this point, it would seem meaningless unless you DI rinsed from this point on... sounds very expensive...

Rudy Sedlak
RD Chemical Company


Frank Conti wrote:
Technetters:

A question for all pcb fab experts. Having a disagreement in house on the
importance of a D.I. rinse (compared to a fresh water rinse) after chem.
clean for inner layer cores prior to resist application.

How important is a D.I. rinse or rinses. Your input is very much
appreciated.



Thanks

Frank Conti
Quality Process Tech.
Triangle Circuits of Pgh.
Phone: 412.828.5322 ext 627
E-Mail: [log in to unmask]

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