4mil GND trace到底有無效果？

no2892215

When PCB  layout area is not enough, we often use 4mil GND trace to shielding RF clock trace with 4mil spacing.
$ z, n) ~2 U' }1 O" WIs this way enough to avoid RF clock signal to couple other signal trace near the 4mil trace?
Thanks

mic29

u r proposed to refer to 3W rule.  
7 h  y" ?/ J0 M: M6 pwhen clock trace is 5 mils, u will need 10 mils spacing.
of course GND trace will help, but PTH through holes with proper interval will do it better.
7 J- q, e0 v3 M* i- c
2 q" H+ Z& F( {" y  a: x! }google it for detailed information, please!