Design Guidelines Layer Orientation Material Conductors Drill Annular Rings Surfaces Solder StopMask Marking Print Mechanical

Marking Print (Component Identification)

1. Purpose and Properties

The marking print (also known as silkscreen or position print) serves the following purposes:

  • Identification of component positions
  • Service markings

We use a two-component paint for the marking print, applied using the screen printing process.

2. Design Guidelines

Clearance:

Solder pads must not be covered by the marking print. This can cause issues during soldering, assembly, and electrical testing. A minimum clearance of 0.2 mm must be maintained between contact surfaces and marking print.

Incorrect:
  • Text and lines overlap pads
  • Difficult to read
  • Pads not accessible for E-test
  • Problems during SMD soldering
Correct:
  • Clear and easy-to-read marking
  • Pads remain accessible for testing
  • No issues during soldering

If we detect any solder pad that is covered (clearance < 200µm), we will remove the marking print in that area during processing.

Text and Line Dimensions

  • Minimum line width: 0.254 mm
  • Minimum text height: 1.3 mm
Important:

To ensure legibility, both text height and line thickness must not be too small. The recommended ratio of text height to line width is between 15:1 and 8:1. The ideal ratio is 60 mil height / 8 mil line width.