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question about threshold voltage in 90nm technology

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lokesh garg

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i am working on UMC 90 technology , in Hspice model of 1.0v vdd nmos, vth is given as -1.00e-3..... i want to know that is this the correct value......and similarly for pmos the value is -5.82e-2.......

thanks
 

wpchan05

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lokesh garg said:
i am working on UMC 90 technology , in Hspice model of 1.0v vdd nmos, vth is given as -1.00e-3..... i want to know that is this the correct value......and similarly for pmos the value is -5.82e-2.......

thanks

what specific type of nmos or pmos are you looking at?
 

lokesh garg

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ya i know that must be around 0.3v.... i want to know why very low and negative value is given there????????

Added after 2 minutes:

i am looking only for standard performance nmos and pmos or you can say for typical case..............
 

wpchan05

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lokesh garg said:
ya i know that must be around 0.3v.... i want to know why very low and negative value is given there????????

Added after 2 minutes:

i am looking only for standard performance nmos and pmos or you can say for typical case..............


N_12_LL NMOS is 0.3 volt, and P_12_LL PMOS is -0..365 volt. You can find this in the L90_LL12LV102.mdl.
 

lokesh garg

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wpchan05............... your are saying aboutthreshold voltage of low leakage MOSFET. there is one another model L90_SP10_V061.model.... i am using this model..... please check it once.........
 

zhd

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I have the same question either I'm using L90_SP10_V051 and the same threshold voltages are reported
 

lokesh garg

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somebody replyyyyyyyyyyyyyyyyyyyyyy............ i need it badly...........
 

DZC

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I doubt what you've checked is corner related paprameter?
Do a simple .OP or .DC in hsipce and check the log file to get the real vth
Good luck!
 

lokesh garg

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how it will show the real vth........... it only tells the model file parameters........
 

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