On Wed, May 25, 2011 at 2:40 PM, Colin D Bennett <co...@gibibit.com> wrote: > On Wed, 25 May 2011 23:03:06 +0200 > Gabriel Paubert <paub...@iram.es> wrote: > >> This said, most capacitors look to have a square profile, but >> resonance frequencies observed on microstrip line change between >> mounting the layers parallel or perpendicular to the ground plane. >> The problem is that, for most capacitors, it is very hard to >> determine the orientation of the layers. > > That's interesting. Are you saying that for high-frequency, critical > signals, the orientation of the chip capacitor affects its performance > in the circuit? Is the SMD tape/reel packed in such a way that the > capacitors are optimally oriented, ready for pick-and-place onto a > PCB? >
My understanding is that many resistors have a similar problem in that the thin resistive strip is on the "top" or "bottom" of the device. Mounting it upside down increases inductance. _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user