Project Ghost Slab - Stage 2 Notes Layout notes (user to implement in PCB editor): - Touch pads: 1.0 mm GND keepout under touch pads on the layer below; touch pad copper must be preserved (do not delete, do not stitch) and must be bare ENIG (solder mask opening). - USB notch: maintain 0.5 mm copper pullback from the USB notch edge. Power net intent: - VBAT = 3.7 V (battery rail) - 5V = 5.0 V (USB/LED rail) - 3V3 = 3.3 V (logic rail) Routing intent: - RF_ANT must be strictly point-to-point between modem RF_ANT pin and U.FL signal with no stubs. Note: Manual keepouts, repours, and autoroute are performed by the user.