If the customer specifies .001" as a min. then thats the min. Nothing
     below that is acceptable. You can however call the customer and find
     out what they'll accept for low copper. BE CAREFUL!

     Mike Doty
     Hadco TCE


______________________________ Reply Separator _________________________________
Subject: [TN] Hot: Copper plating thickness
Author:  Ken Patel <[log in to unmask]> at smtplink-hadco
Date:    9/29/99 10:42 AM


If my requirement for the copper plating is 0.001" minimum (as spelled out
on my fab drawing) and if I am reading it between .0004"-.001", is it
rejects or not?. I tried to look at IPC-6012 which is calling out avg copper
thickness. I don't how easy to get ave #. This is clearly a reject to me.
But I am looking for an expert opinion on the subject. Via Hole in question
is 16 mil +3 mil / -10 mils.

re,
ken patel
______________________________________________________
Ken Patel                       Phone:  (408) 490-6804
1708 McCarthy Blvd.             Fax:    (408) 490-6859
Milpitas, CA 95035              Beeper: (888) 769-1808

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