Silkscreen or component identification are terms used for the text layers of a PCB.

We refer to them as the Legend layers.

These are printed on top of the Soldermask and available in various colours which must be defined by our customer in the order details and supplied in the PCB data.

Line art and text may be printed onto the outer surfaces of a PCB usually by Liquid Photo Image able ink but we use digital printing solutions instead.

In some cases direct screen printing of the image is still used.

Look here to see the our machines at work to apply the legend.

Legend

  • Legend must be readable and legible.
  • Marking ink should not reduce the minimum annular ring.
  • On SMT-pads with a pitch of 1,25 mm encroachment it is permitted on one side of the land only and if it does not
    exceed 50 microns (2 mil).
  • On SMT-pads with a pitch < 1,25 mm encroachment it is permitted on one side of the land only and if it does not
    exceed 25 micron (1 mil).
  • Line width: min 0,10 mm (4mil).
  • Broken against soldermask.
  • PCB-borders are deleted in the legend

See our Design Guidelines page 17.

 

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