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1996

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Subject:
From:
Dieter Bergman <[log in to unmask]>
Date:
Thu, 11 Jan 1996 14:19:44 -0600 (CST)
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TEXT/PLAIN (41 lines) 

The following question is one that was provided by designers for
the  A  basic level exam. It is NOT included in the final
published test and is for reference only. The topic is Hole
Requirements.

     *************************************************************
     
          112  How should the clearance be determined between a   
               non-functional land and a conductive plane that    
               surrounds the land?
          
               A.   by maintaining a minimum of 0.2 mm [.008"]
               B.   by maintaining a minimum of 0.25 mm [.010"]
               C.   by maintaining clearance equal to the 
                    conductor spacing requirements
               D.   by maintaining clearance based on the copper
                    thickness and etch factor

                                   select the most correct answer

          ***************************************************************
Previous QOD

          111  What is the main consideration in the standard     
               fabrication allowance?
          
                         A.   process variation
          
Resource: IPC-T-50 Specific Terms and IPC-D-275 para 5.3.2.1;
5.3.4.1; table 5-10.

          ****************************************************************

Please send comments, constructive critique, or suggestions to
Lisa Williams at [log in to unmask] 

Dieter Bergman

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