In going back and thinking about this (since I sometimes like to connect two "radiating" areas of copper on opposite sides of the board with vias for heat conduction), I wondered: solder is not a great heat conductor, but it is better than air or solder mask, isn't it? What do you think would be a good way to achieve a "thermal via"? Seth Goodman Goodman & Associates 7687 Leta Way Verona, WI 53593 Tel (608)833-9933 Fax (608)833-9966 > -----Original Message----- > From: TechNet [mailto:[log in to unmask]]On Behalf Of [log in to unmask] > Sent: Thursday, December 17, 1998 4:25 PM > To: [log in to unmask] > Subject: [TN] FAB: Solder Filled Thermal Vias > > > I may be wrong interpreting your question, but it seems you want > to get heat out. Are these vias > "heat pipes?" If so, keep them open. As you know, solder is not a > good thermal conductor. > > Earl Moon > > ################################################################ > TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c > ################################################################ > To subscribe/unsubscribe, send a message to [log in to unmask] with > following text in the body: > To subscribe: SUBSCRIBE TechNet <your full name> > To unsubscribe: SIGNOFF TechNet > ################################################################ > Please visit IPC's web site (http://www.ipc.org) "On-Line > Services" section for additional information. > For technical support contact Hugo Scaramuzza at [log in to unmask] > or 847-509-9700 ext.312 > ################################################################ > > ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################