Milkymist One RC2 PCB Specification
 PCB Specification
In general, your pcb specifications needed to be defined well at initial stage of kicking off project. So you can just list specifications as below with your final gerber files enclosed an engineering confirmation checklist, and all send them out. Your pcb maker will make pcb for you. Please note, pcb manufacturers after receiving gerber, usually a more detailed breakdown of the production of works recognized, see the Notification.
- Six Layers PCB
- Board Dimensions 150mm x 125mm in piece, 158mm x 133mm in panel
- 10mil drill via hole pth
- top & bot line width/line clearance, 5mils/5mils
- top & bot 5mil annular rings
- 1.6mm +- 0.05 mm thickness.
- Components placed on TOP & BOT layer.
- Stacking of layers: 1st layer Top/Compnents/Signals, 2nd layer Gnd, 3rd layer Signal, 4th layer Gnd, 5th layer Power, 6th layer Bottom/Components/Signals.
 Board Layout
The gerber files and drill file are under http://downloads.qi-hardware.com/hardware/milkymist_one/gerber/rc2/.
 PCB & Parts Reference
 Different Views of Milkymist One board
 QA Outgoing Inspection Report from PCB maker
The following inspections based on your data sent to pcb maker. Those details of inspection report would exactly more than yours.
New Heart Corporation Outgoing Report PDF file.
 Micro Section of PCB
To be Updated pictures soon.
PCB stack up is made at initial stage of routing. In general this data is defined by customer design side not pcb maker. So if you don't request pcb maker follow a specific stack up, they will use the most popular stack up. You should ask pcb maker to provide this data. For MM1 project, we defined this to let pcb maker follow it.
General pcb industry, pcb designer will inform the pcb industry in all the through hole is to be all-plug hole process. But this process must follow the pcb industry's own processes can in each though hole can support all plug holes. To this rc2 production process, pcb industry informed the U10 through hole 30 near the aperture design is a 24 mil. the actual hole diameter is 21 mil, due to pore size is too large to plug holes for solder coating. In other words, while noticing pcb manufacturer to produce PCBs, the need to plug holes and using some non-plug hole is to be clear clarification or mark that the area to facilitate.