I am designing a simple dual layer board which has some ICs that I have to put decoupling capacitors near them.
Initially I wanted to make both top and bottom layer as ground plane and route signals and power with traces. But then I found this answer here and decided to make my top layer a power plane (but honestly did not understand why!)
So my question is, should I forget the VCC plane and make both top and bottom planes as ground?
My board has only one 5V supply input called VCC_IN which then goes into a EMI filter (which I am not sure if it is going to be any good) and after R11 (R11 and R12 are going to be 1206 ferrite beads) and C14 it will be called VCC and turns into a power pour.
So, I wonder what kind of effects I am going to see on C1 and C2 as decoupling capacitor compared to if the top pour was also ground and I just routed VCC using a normal track?