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Yes if u place the diodes wt happens is u can avoid antenna effect
the reason is simple the diodes are made from diffusion , but the poly is deposited onto wafer bfore the diffusion are implanted into the wafer.Hence the diode doesn't exist at the time the poly is fabricated on the wafer
And one more explaination is when the more charges are deposited on the metal lines which are running parallely over a long distance..If it touches the gate oxide the gate oxide will break so we will try to put a diodes in between them so that we can reduce it
How means it depends upon the max diode rating if it exceeds then only it gets discharges
We will place the layout of that which is nothng but metal and the contact...