Spacing between Planes is decided on the basis of Voltages they are supposed to carry.
In High Speed boards I generally define spacing of 1mm or 40 mil. In some cases 20 mil is also used.
Re: how can we decide the gap / separation among split plane
hi Ricky
Thanks 4 your reply but the thing is not tabulated , i mean that if we have "x volts " we need "y mm" separation, if any body have such table kindly provide it
Re: how can we decide the gap / separation among split plane
Nobody in this forum is able to provide tabulated form of spacing between the power plane !!!! .All are using thumb of rule"""of 40mill and 20 mill spacing.
Actually the separation between to voltages is defiened according to their workin e.g. A Potential Difference in primary will have different spacing requirement than one in secondary.
So to get the exact value I think you shoul ask your Safety engineer other wise you follow rule of thumb values which you can get on searching through Internet.
Re: how can we decide the gap / separation among split plane
The gap can be small (down to 10 mils or so) if you are splitting the plane for EMI purposes, or if split planes have low supply voltages (e.g. +3.3V and +12V).
edaedaeda said:
I believe you are looking for creepage values (how much Gap do I need between two different voltages)