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June 2008

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Subject:
IPC-6012A - allowable conductor width reduction interpretation?
From:
Joe Macko <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Mon, 30 Jun 2008 09:45:13 -0700
Content-Type:
text/plain
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text/plain (37 lines) 
All,

 

IPC-6012A with amendment 1, section 3.5.1, Conductor Width and Thickness
states, "When not specified on the master drawing the minimum conductor
width shall be  80% of the conductor pattern supplied in the procurement
documentation".  The PCB suppliers interpret this to mean that BGA pads
for example can be 80% of the pad diameter specified in the procurement
documentation, which is the GERBER files unless specified otherwise and
still be acceptable per IPC-6012.

 

I am interested to hear how other users handle allowable reductions in
BGA pad size from that specified in the procurement documentation.
thanks

 

Best Regards,

-joe

 


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