PCB manufacturing – University of Copenhagen

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NBI Support > Technical support > The Electronics Workshop > PCB manufacturing

The electronics workshop is capable of rapid prototyping. In the old days that was accomplished by phototransfer, development, chemical etching and manual drilling the boards. Today we use a modern workflow which involves a milling/routing machine for the purpose.

We encourage all groups that would like to make PCB’s for prototyping, to adhere to some minimum requirments as the technique of routing has some constraints.

We can make 2 sided PCB’s (Top layer & Bottom layer).

We can NOT make plated vias or pads. So keep that in mind when doing the outlay.

These are the limits:

-Tracks should be at least 12 mils (0.3mm), we recommend 15 mils (0.38 mm)

-Distance between tracks can never be less than 4 mils (0.1 mm), and will most likely be more. We recommend 8 mils (0.2mm).

-Vias and Pads should never be less than 65 mils (1.65mm), we recommend 85 mils (2.16 mm)

-Via and Pad holes CAN be 8 mils (0.2mm), but we recommend 32 mils (0.8 mm)

-Clearance between tracks and other objects should be at least 4 mils (0.1 mm), since this is the smallest router available. And very expensive by the way.

The most common thru-hole components use pins in 32 mils (0.8mm), or connectors that often use 40 mils  (1mm) or 44 mils (1.1mm). Measure if possible.

If you can absolutely not fit your design within these requirements, then we can recommend some excellent PCB manufacturers that we use ourselves. All their requirements can be found on their websites or you can contact them by phone.