Hi everyone, Some engineer try to analyze the package by using 3D full wave field solver such as HFSS. But as you know, the power and ground nets was disconnected generally. So they put the PEC metal to short the disconnected ground nets. Is it a right method? Is there any other methodology to simulate package? How about Hybrid tools? They do not use PEC but pin grouping. I guess pin grouping means equi-potential so that is similar with PEC right? Thanks, Delta ------------------------------------------------------------------ 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 technical documents are available at: http://www.si-list.net List archives are viewable at: //www.freelists.org/archives/si-list Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu