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Limit for the max number of vias per unit area

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anjali

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can we have more vias in the connecting area without violating DRCs

i.e is there any limit for the max number of vias per unit area?
 

leeenghan

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Re: adding vias

Hi,

No. However, newer process has via density requirement but usually it is too low a density that is a problem.

In the "past", it is a practise not to cover an area with maximum number of via as the huge number of vias will slow down the operation of the computer, make DRC/LVS run much slower and increase the disk size of the database. I think these problems do not exist anymore.

Regards,
Eng Han
 

vbhupendra

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Re: adding vias

I think yes there is limit on no of vias per unit area.
 

anjali

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Re: adding vias

can anybody provide a good book or a link for DFM rules..
 

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