Good day!

We are considering using SMOBC (tented vias) and Entek on a press fit
connector backplane.  The assembly process will not coat the Entek with
solder or conformal coat.  The boards will go into the field with only
Entek as an oxidation barrier for the copper.

The use environment is in a non-temperature controlled external buildings
(shacks), ie ambient temperatures and humidity.  Installations are expected
in high humidity and in arid areas, near oceans, in both hot and cold
climates, basically any metro area.

Question:  What level of protection could I expect from the Entek in these
environments?  Using IPC definitions of Performance Classes (eg
IPC-RB-276), Would yuo use this for class 2 boards?, Class 3?

Are there any success stories, horror stories, or maybe even data?

I would not be upset to receive a phone call from an Enthone Techie on the
subject.

Thanks for your help.


  ====================================================================
                           George Franck
  PWB Product Assurance                     Phone (703) 560-5000 x2648
  Raytheon E-Systems  M/S N408                    Fax   (703) 280-4613
  7700 Arlington Blvd                  E-Mail: [log in to unmask]
  Falls Church Va 22046                      E-Mail: [log in to unmask]
  ====================================================================


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