Let us have a look at these specific details. Board outlineĪny fabrication drawing is incomplete without a pictorial representation of the circuit board. This includes all the cut-outs, holes, different radii, and specific distances that are supposed to be in the actual board. All the dimensions are measured from an origin (0,0) point. This origin point on the fab drawing must be the same as that of the (0,0) point on the NC drill data file. The drilled holes are also pointed out in this drawing with proper symbols that link them to the drill chart.

Drill chart Drill chart for fabrication drawing in Altium DesignerĪ drill chart demonstrates all the particular symbols assigned to the drilled holes in the board outline.

This chart contains the information related to the drilled hole requirements of the circuit board to be manufactured.

Drill symbols may be shapes or textual characters used to represent a hole’s position.

These symbols are generated by the PCB layout software.Ī drill chart features specific symbols with respect to the hole size. This chart also displays details about the number of holes of a particular size, whether they are plated or not, what their hole tolerances are, and so on. Just like any other mechanical/electrical drawing, the title block of a fab drawing will consist of the customer name, part number, revisions, any fabrication number specified, and the measurement units.

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