[SOLVED] direct metal 2 connection to poly gate

[preethi19]

Hi i have always noticed in layout design when connection from one metal goes to anther metal we start from 1 and then use via and keep on going with metal 2,3 and so on... my question is like say i have a poly and i create a contact and instead of using metal 1 i directly create a via on top of the contact (without using metal 1) and then connect metal 2. So its just like poly, contact, via, and finally metal 2. Is it possible to do this first of all and will the connection work???? . Thank you!!!!

 

[dick_freebird]

If it worked at all, it would likely give you a very
poor step coverage and repeatability / integrity.
Everything is "tuned for the normal" and in a non-
plug-contact system the foundry expects metal1
to provide the fill material for contact cuts. Via1
expects to sit on a bed of metal2, not an open pit.
That kind of thing. Depth of field issues, unfilled
contact issues (what kind of PR, etch and clean
residue will fill that pit and sit between your metal2
and the contact floor? What will it do to the hoped-
for contact sinter? And more to the point, who had
ever done it beforehand, to say it will work once
let alone 999,999,999 times out of 1,000,000,000?

There's plent of art to create, but this sort will not
find you an appreciative audience.