Tom,
     
      I agree that thermals are only necessary for solderability of thru-hole 
     component leads.  They keep the planes from drawing heat away from the 
     leads and causing a "cold" solder joint.  I've been using direct 
     connections to inner planes for vias.
     
     Gary Fuller
     Edwards Systems Technology
     Sarasota, FL
     [log in to unmask]

______________________________ Reply Separator _________________________________
Subject: Re: Design (fwd)
Author:  [log in to unmask] at Internet2
Date:    09-17-96 08:46



This discussion brings up another point....

Does it make sense to use thermal connections on vias?
Thermals were originally used on thru hole comps to increase
solderability of the leads, but now that is not necessary for SMT.
Is there any reason to use them for vias? 
I've been using direct connection to the inner planes.

Tom Kavendek
Lucent Technologies
Murray Hill, N.J.
[log in to unmask]

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