User's Manual

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o Also signal vias shall be prohibited to avoid risks of short-circuit with main board
GND.
• There is no component on top of the CPU
Care must be taken in order to equilibrate the layout, to avoid that the PCB becomes curved during
soldering process (due to differential thermal expansion of the copper layers).
The cut-hole size must be defined big enough in order to get a solid solder area, and to avoid that
the copper of the hole is snatched during milling process.
The solder is
put here
CPU
Daughter board