Power trace vs Power plane

[jerry117]

I've heared two versions. One is that power plane maybe causes noise coupling, and the other is that power trace can restrain noise coupling. Which layout of power is better?

 

[flatulent]

Successful companies whose products work and pass EMI regulation tests always use power and ground planes. Sometimes several of each.

 

[alphi]

I think it is vary with your application.
large gnd plane is better for esd,but it is worse for emi because of it large loop area.

 

[Git]

alphi - surely having a pin go immediately to ground plane is the shortest loop you can get (given that the vcc has the same route in both cases)?

Git

 

[lyric]

power plane is better than power traces,because traces will bring more inductence into power distribution system, which will cause ground bounce, EMI, etc, espeasialy for high speed digital system

 

[MentorSI]

Power plane has a lower impandence and it provides a smaller loop area than power lines.

 

[amjad]

Power planes are much more better then power traces because it provides better connectivity