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Poly Jumper in Layout

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It was the first thing I read on Saints book IC MASK DESIGN that you use poly jumpers. But later I found out that poly line has very big resistance higher than M1 or M2 and I never used it. If oyu add the resistance of poly + the contact resistance then you have created a very high parasitic resistance in this small node. Also, as poly line is closer to the substrate pracitic capacitance is quite big.

Therefore I suggest never use poly jumpers on lines, unless you have run out of metals - in any case you can avoid this situation- or you don't care about the paracitics much.

D.
 

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