Hi Werner,
the SMC WP004 was published in 1997. You can find it under:
http://www.ipc.org/4.0_Knowledge/4.1_Standards/smcwp004.pdf

Go to page 66, Chapter 4.3.2. There you will find your recommendation regarding barrel thickness  (25 - 38 [µm]). 
 
Cheers,
Gebhard
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Von: TechNet [mailto:[log in to unmask]] Im Auftrag von Neifer, Gebhard
Gesendet: Mittwoch, 25. Juli 2007 10:00
An: [log in to unmask]
Betreff: [TN] AW: [TN] AW: [TN] Question on plated through holes general

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