Bottom Layer Routing Notes
Objective
Move/reroute PCB traces to the Bottom copper layer while preserving components, pads, vias, connectivity, designators, values, footprints, and board outline.
Actions Performed
- Inspected the PCB layout for routed trace objects / route segments.
- Found no existing route segment objects in the layout data; the PCB currently has airwires/unrouted connections rather than completed routed traces.
- Set all 18 net-level layout layer rules to
Bottom so future/regenerated route copper is constrained to the Bottom layer.
- Verified the board remains a 160 mm × 100 mm rectangle with the existing component placements unchanged during this pass.
Verification Results
- Route segment query returned no routed trace objects to reassign.
- DRC still reports 44 airwire errors, meaning physical routing is incomplete.
- No evidence of non-bottom route segments was found, but the success criterion requiring completed connectivity cannot be met until those airwires are routed.
Remaining Work
Use the PCB routing workflow/manual routing to route the remaining airwires on the Bottom copper layer, then rerun DRC to confirm zero trace-routing errors.