Hi,
The K' value of IBM .18 um RF process is given at Mosis test run results in the following link
http://www.mosis.org/cgi-bin/cgiwrap/umosis/swp/params/ibm-018/t6cc_7rf_6lm_ml-p...

It is written over there that K'=Cox*u0/2 = 155.9 for NMOS transistor.
However when we calculate K' by using u0 (=270.6 & Cox~7.67 fF ) from spice model in same page it gives a different value.

1) Which K' should be used when doing hand calculations?

2) For a basic inverter the mobility difference could be compasated by making (W/L)p=2.3(W/L)n.
However here (if it's correct) K'n (=156) is almost 5 times larger than  K'p(=32.5). Is it a normal ratio for .18um process?

Thanks in advance
eng