IPC par. 3.5.4.4.b define classes of dewetting.

The questin is if the percentage is related to each unit of soldering (i.e.
5% of each soldering pad) or the 5% is a total of the dewetted solder area.

Similar definition is also in ANSI/J-STD-003 par. 4.2.4.5.2 - Accept/Reject
Critirion. "A minimum of 95% of each of the surface being tested..." refer
to each individual inspected pad or the total pads area being inspected?

In the first case 100% of the pads will be soldered, in the second case 5%
of the pads might have soldering problems.

What is your interpretation?  
Hillel Dzigan - Quality Manager
Eltek Ltd.
Phone +972-3-939-5022, Fax +972-3-930-9581
P.O. Box 159, Petach-Tikva 49101, ISRAEL

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