raja.cedt wrote on Apr 1st, 2016, 2:18am:Multipliers are separated by ST kind of isolation, so fingers adjacent to STI will have higher stress during manufacturing. Where as fingers are adjacent to another finger hence no stress. So Vth strongly depends on where they are.
Please refer LOD and STI effects in Google.
Best regards,
Raj.
This is true, but I haven't had to lay them out that way to pass LVS. For example, if the device was M=10, NF=2, you could lay it out as M=1, NF=20 and pass LVS. Extracted simulations are real important to model this sort of stuff.
Dummy devices should be used so the surroundings are the same no matter how many fingers you use. If you use them, it won't matter if you use M or NF.