Hello All, I am testing a new IC proto and found an oscillation at several tens of GHz. After spending quite some time simulating the structures we were able to identify that the issue was related to coupling as well as the termination of the line inside the IC. To demonstrate that it was true we put a drop of H2O on the area where we expected the problem to be and as simulated the water stopped the oscillation. Of course that was true until the heat of the IC evaporated the water and oscillation restarted. This work and we do not have to respin the IC yet but it is a PAIN!!!! Does anybody knows a material that would work like water but it is more permanent and does not degrade at temperature between 90 and 120 degC? Thanks Roger Delbue ------------------------------------------------------------------ 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 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