Barrel can have .0042" copper plating and the surface will have this
plus the base copper foil - ie 1 oz + the 3 oz = 4 oz (.0056") surface
features.  Lines and spaces on surfaces should be .015" minimum.


Jeffrey Bush
Director, Quality Assurance and Technical Support

                          76 Technology Drive - POB 1890
                             Brattleboro, Vermont 05302-1890
                                Tel. 802.257.4571.21 Fax. 802.257.0011
                                    [log in to unmask]
                              http://www.vtcircuits.com	



-----Original Message-----
From: Roger Alexander [mailto:[log in to unmask]] 
Sent: Saturday, April 24, 2004 7:28 AM
To: [log in to unmask]
Subject: [TN] Stack-up for 2 layer, 3oz. copper board


Hello all,
   I have a question concerning the stack-up for a 2 layer board in
which I need 3 oz. copper plating in the barrels.  What copper foil
thickness should I specify?  I want to insure that I get 3 oz. copper
for all lands/traces and in the barrels of all holes.  I have never
specified 3 oz. copper and didn't really know what is typically done for
3 oz. copper.

Thank you,

Roger

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