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Forum / Schematic Design & PCB Layout / How many layer do you see in this board ? (raspberry pi 4 waveshare PCB for Compute Module) ?

How many layer do you see in this board ? (raspberry pi 4 waveshare PCB for Compute Module) ?

grafityy , 04-20-2025, 11:33 AM

Hello,
I am trying to find the number of layer of the board used by WaveShare for making their raspberry board for Compute Module. https://www.waveshare.com/cm4-io-base-a.htm

How many layer do you think there are in this picture ? (thikness is 1.6mm)
I think it's a 4-layers like this :
Thanks you very much !