The only item to watch out with direct connection to the plane is the pink ring condition. Although it is not a functional defect but aesthetically the boards may not be good. The amount of pink ring on your board is a function of quality of your fab supplier. Please make a note of this. ______________________________ Reply Separator _________________________________ Subject: Re: Design (fwd) Author: [log in to unmask] at corp Date: 9/17/96 08:52 AM Tom, I use a direct connection for vias also, the only thing to watch for is the distance from via to smd pin connecting trace & width. = And of course if you use via in pad, then you still need the thermal relief.= __________cut here______________ 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] **************************************************************************** * The mail list is provided as a service by IPC using SmartList v3.05 * **************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * **************************************************************************** **************************************************************************** * The mail list is provided as a service by IPC using SmartList v3.05 * **************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ****************************************************************************