Book of Kane (Northforge Fabrication's Wiki that is sadly no longer available)

Some additional notes on board design and fabrication:

• Slots are hard in this process. Please consider using a single drill hit that’s wide enough if possible. If it’s unavoidable, the current recommended option is to use overlapping drill hits.
• Plating is typically avoidable by making vias with a diameter of 40 mil (1 mm). A standard 0.1” header pin can then be pushed through and soldered on both the top and bottom.
• Higher polygon isolation will reduce the chance of bridging to a plane during assembly (since we don’t really offer soldermask). However, it will also increase etch time.