TN:

Most important question:  Does anyone have a list of contract labs utilizing SERA technology?

Reasoning ...

I have had some off-forum discussion with individuals expressing concern about solderability issues for Dexter and German Omricron.  I am familiar with Florida CirTech Omikron and have not heard a solderability concern thus far.

Is SERA a true test of solderability of this finish type?  I am interested in SERA testing at a facility on a regular basis to have a full database to study/archive should an issue arise.

It seems SERA can acknowledge surface oxidation, thicknesses, and intermetalics based on a potential curve versus time.   What happens when the experiment designed for oxides of tin and intermetallics encounters something else?  ... like another metal (noble or otherwise or a semisoluble surfactant?).

>>>  I am just on break here speculating about the design of the SERA experiment for immersion tin in terms of  basic assumptions that only tin and copper exist below the surface.  What means exists to check for interferences in the white tin material from Dexter, to German Omricron, to Florida CirTech Omikron? <<<

If there's a SERA guru out there, input is welcomed.

Paul Wilson
Plant Chemist
Circuit Center, Inc.

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