Silk-screen, is a terminology from old times rather than a name, for making screens to print on various items. This terminology carried in to the PCB industry and is used to refer to the top most (or bottom most) Layer (in your PCB design CAD software) that holds the information to be printed on the final fabricated PCB. This information includes (but is not limited to) Annotations, Part / component outlines, Designator texts, Company name and information, any company or industry certification Logos (like RoHS, CE, UL etc..), markings for Testability and/or Visual inspection that are generally used in Panel designs, and so forth.
There are mostly 2 layers of Silk-screen, one for the Top surface of the PCB and the other for the bottom surface of the PCB. Generally, the silk-screen can have any orientation of text, but making it elegant and beautiful is more art than science.
Designers are supposed to pay attention to few problems that may be faced if they are not too careful with their placement of texts or logos on the silk-screen. MKT makes sure to review these issues when you submit your design and guide you for any potential problems. Some of the common problems are:
- Silk-screen pattern covering Bare copper areas, like Pads, Vias, or bare traces that have to be solder-filled.
- Silk-screen patterns too small to be printable OR too big to fit.
- Silk-screen patterns too close to each other, resulting in overlapping symbols, looking smudged,
If your CAD software offers Rule checking for DFX then this will be easily checked and corrected at design finalization, otherwise we also check your files for such rules and give our suggestions.
Please make sure you include all relevant layer information with the Gerbers and Drill files so we can review and point out potential issues.