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Reply To: | TechNet Mail Forum. |
Date: | Wed, 14 Jan 1998 16:14:44 -0600 |
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I have a 4 layer design which includes significant areas of solid
plane on every layer. Our design guidelines call for clearances
between the plane and any other conductor (trace or pad) of 0.015" on
outer layers and 0.012" on inner layers. Clearance trace-trace,
trace-pad, and pad-pad is 0.008". The design Engineer wants 0.008"
clearance between planes and oher conductive features. Can anyone
explain the reason for the difference between clearance to planes and
to other features? We're using 1 oz. copper on the inner layers and
0.5oz. (1.5oz finninshd) on the outers. Thanks in advance for any
words of wisdom you can provide.
Paul Ziarek
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