Horizontal and Vertical Routing

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vlsitechnology

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Why do we go for both horizontal and vertical routing ? why not only Horizontal ?? what kind of problem do we get if we go for only horizontal routing?

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If you use only horizontal routing. Your parasitics cap between wires of different metal layers increase. Also, while fabrication, a horizontal only routing could increase the probability of metals in adjacent layers getting shorted at some point.
 
vlsitechnology said:
Why do we go for both horizontal and vertical routing ? why not only Horizontal ?? what kind of problem do we get if we go for only horizontal routing?

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It is not possible to connect two points by a horizontal line always.
 

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