How about Pad-capacitor??

[ljy4468]

hi all~

I want to know about Pad capacitor

I'm using 0.35u tech,
and PAD is about 100u X 100u (m1,m2,m3,m4)

Then How about capacitance of PAD??

 

[sunking]

it depond on the structre of the pad.
connect to the foundry.

 

[Baiyawfan]

PAD's cap depends on PAD and the ESD buffer which is connected inside,and as I know,for 0.35um,PAD Cap is about 3~5pF(based on the ESD Circuits' size).
And voltage on the PAD also infulence the CAP's value,so it is not fixed.

Hope to help you a little.

 

[ljy4468]

Oh~ 3~5pF?
That's bigger than I thought
Thanks for your answer.