pro's for odd layer builds are few (to my knowledge),ie;
     ability to add additional functions without the normal cost adders 
     associated with 4 layer, 6 layer etc.
     
     potential for maintaining somewhat thinner profile over extra layers
     
     con's outweight the above (again in my opinion);
     built in warp and twist factor (added) due to weave of fibre 
     pulling/pushing against each other (odd layers tend to over power)
     
     fall out rate due to excessive warp/twist possibility is greater (cost)
     
     normal process of building the "book" for processing is different (operator
awareness)

      




     

______________________________ Reply Separator _________________________________
Subject: FAB : Odd Layer PCB's
Author:  [log in to unmask] at SMTPLINK-HADCO
Date:    6/27/96 2:09 AM


Dear TechNet,
     
Can anyone give me pro's and con's for designing Odd number of Layer 
PCB's i.e. 3 and 5 layer boards
     
Stephen Cooper
Manufacturing Projects Manager
     
SCITEC LIMITED
Apollo Place
Lane Cove NSW 2066
Australia
     
Phone   : +612 428 9500
Fax     : +612 428 9589
Email   : [log in to unmask] 
Website : http://www.scitec.com.au