Talking with different board houses and other PCB designers I get different minimum widths for traces and gaps for high volume production boards.  One board house tells me:
 
 
Copper weight Minimum trace width Minimum gap
1 oz. 5 5
2 oz. 7 7
3 oz. 12 8
4 oz. 12 10

I would really be interested in others opinions on this and I'm sure others would be interested also.  It might also be interesting to see what others are using for via holes and pad size for the 4 copper weights.

Thanks
Heart Akerson
Heart Transverter S.A.
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