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FurkanDursun , 01-28-2020, 03:48 AM

Hello everyone,

I would like to ask some questions about polygon, power planes and etc.

What is the polygon Pour?

Why do we need to Power Plane or GND Plane?

Why do we need to polygon Pour?

xddarko , 01-28-2020, 12:55 PM

Hi,

A polygon Pour is also a copper pour which is a copper surface that you define depending on your specifications and space limitations.
Actually we do not necessarily need a power plane or a GND plane but it is RECOMMENDED and in some cases, necessary for noise reductions and short returns for high density boards.

FurkanDursun , 01-28-2020, 11:39 PM

Thank you.

FurkanDursun , 01-29-2020, 12:02 AM

I would like to ask one more question. How Can we decision about polygon shape? Are there any rules?

robertferanec , 01-29-2020, 06:05 AM

Couple of other simple notes:

- in some simulators, planes may be considered as reference planes and polygons not
- plane in altium is negative layer (where you draw, these are the places where copper is removed), polygon is positive (where you draw, there will be copper)
- planes provide good path for return currents - means they will help you with EMI/EMC and improve signal quality
- polygons / planes are also used in places where you need to carry high currents
- they can be used cool down components (they can be used as some kind of simple heatsink)
- they can be used as shield
- ...