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Why need thick route for clock trunk?

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cafukarfoo

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Hello,

Can anyone share why we need thicker route for clock trunk?

Thanks.
 

often we use higher metal as clock routing, for example in a 6al proc,we use 6al and 5al as clock routing, of course we can use 5al and 4al as clock routing.
the parasitic res of thicker metal is small.
 

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    cafukarfoo

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Clock nets r highly switching nets and needs less delay to reduce the skew,slew etc...
high metal layers have less resistance and in order to reduce the crosstalk we use shielding or isolation
 

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