Hi all, I have an IPC-D-325A question.

In table 4-2 'Typical Master Drawing Detail Requirements' under 
characteristics 'G Design Concepts' requirement 1 reads:

         Maximum rated voltage (maximum voltage between two 
non-connected adjacent conductors with the greatest potential difference).

When would this requirement be needed on a Master Drawing?

         For electrical net testing?
         For dielectric thickness requirement?

If it were intended to inform the board shop at what voltage to do 
the net test why not just say TEST NET LIST USING 40V or 250V.

If it were intended to specify the need for a minimum dielectric 
thickness between layers again why not just say 5000V BETWEEN LAYERS 1 AND 2.

Any other ideas?




Donald Kyle C.I.D.+
281-285-7528 voice
281-285-8593 fax
[log in to unmask]
Schlumberger
Sugar Land Product Center (SPC)
Mail Drop MD155-1
155 Industrial Boulevard
Sugar Land, Texas 77478 


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