Hello Jan, > From: jan gillis [mailto:jan.gillis@xxxxxxxxxxxxxx] > [...] For soldering purposes, it would > be preferred to > make use of thermal reliefs for the ground vias. But I wonder > what would be > the influence of the pin-to-ground plane impedance. Can > anyone provide some > guideline for this purpose? I never did any simulations in this direction, but I *feel* that a connection without thermal reliefs would be better. This is not founded on simulation results, however. What is the size of the vias you use? Using relatively small vias the soldering process can easily be adopted to provide a high yield without thermal reliefs. We had/have several boards designed in this way. I am also interested in simulation results ... Best regards, Michael ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu