Hi, Steve, The Fabless Semiconductor Association chapter in the San Jose area has had a number of speakers address this topic. Many parameters are highly correlated (or anti-correlated) for P and N transistors. If anyone is interested, I might be able to find out who the speakers were. Information on the FSA can be found at http://www.fsa.org/ Best regards, Lynne "IBIS training when you need it, where you need it." Dr. Lynne Green Green Streak Programs http://www.greenstreakprograms.com 425-788-0412 lgreen22@xxxxxxxxxxxxxx -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of Steve Horne Sent: Tuesday, February 07, 2006 3:07 PM To: james_r_jones@xxxxxxxxx Cc: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Re: Skewed Silicon Parameters Some parameters (such as gate oxide thickness, poly gate dimension) affect both N and P in the same direction, while others (such as dopant implant variation, stress effects) may only affect one type or may push the two types in opposite directions. Because of this, the fab/foundry will often specify corners "fast-slow" and "slow-fast" (P-N) in which the P and N parameters are not as extreme as they are in the "fast-fast" and "slow-slow" corners. More sophisticated fabs will provide statistical models that you can use to perform Monte Carlo simulations, allowing a handful of parameters to vary independently and have their individual effect on N and P transistor performance. Steve james_r_jones@xxxxxxxxx writes: > > Experts, > > There are numerous silicon parameters that can be > skewed that will affect the strength of the silicon. > There are parameters that represent oxidation, channel > length, doping, etc. > > Question is, do these parameters affect P and N type > transistors differently? > > In our simulations, we skew 'process' to either fast > or slow (or maybe typical). In reality, is it > possible to have fast N-type ans slow P-type or vice > versa? Why? What process parameter combinations > could cause this to happen? Do we need to cover this > possibility in simulation? > > Thanks, > -James > ------------------------------------------------------------------ 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 ------------------------------------------------------------------ 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