[SOLVED] MIM CAP UNbalance

[nitin mukesh]

I am connecting my mim cap to one of the drain of a MOS. As I connect the Plus side of the mim cap to the drain of the MOSFET, I get this error

"Unbalanced structure is not allowed."
STAMP unBal_CTM_M8 CTM A.R.MIM.1:M8:A
ANTENNA -gt 0.000000 A.R.MIM.1:M8:A M8i A.R.MIM.1:M8:L262206
STAMP unBal_CTM_M8 CBM A.R.MIM.1:M8:B
ANTENNA -gt 0.000000 A.R.MIM.1:M8:B M8i A.R.MIM.1:M8:L262208
ANTENNA -gt 0.000000 CTM M8i GATE SD A.R.MIM.1:M8:L262209
ANTENNA -gt 0.000000 CBM M8i GATE SD A.R.MIM.1:M8:L262210


I am not able to understand how can I resolve this.

 

[k_90]

For the node that has the lower metal, take it up the the highest metal and back down so both ends of the mim cap start from Met5 ..

A node: Metal 5 > Signal
B node Metal 4 >Via4> Metal 5 > Via4 >Metal 4 > signal

This will balance the mim cap.

This is the Way...

 

[nitin mukesh]

For the node that has the lower metal, take it up the the highest metal and back down so both ends of the mim cap start from Met5 ..

A node: Metal 5 > Signal
B node Metal 4 >Via4> Metal 5 > Via4 >Metal 4 > signal

This will balance the mim cap.

This is the Way...

both the CTM and CBM are of Metal 8

 

[nitin mukesh]

The above problem is solved by using od to metal 8 vias on both the side of the mimcap to balance it.