capacitance between interconnect

[dazzling_deepika]

HI,

I come across this question at several places but never got the right answer:

there are 3 parallel layers of metal interconnect and all three of them are switching as below:
case1:the middle interconnect is switching in one direction(say 0 to 1) and the outer 2 interconnects are BOTH switching in the opposite direction(1 to 0)

case 2:all three are switching in the same direction

case 3:middle interconnect is switching in one direction (say 0 to 1) and the outer two interconnects are switching in the opposite direction w.r.t to each other(one is switching from 0 to 1 and the other from 1 to 0)

In all the three cases what is the effect on the middle interconnect in terms of interconnect capacitance?

Thanks

 

[deepak242003]

dazzinling,

I belive when both are switching in opposite direction theri phase will cancel each other resulting in net zero effect.... but when all are switching in same directio,the phase willl add .. resulsting in more parasicts... wahich will be u;ndesirable