How to Create Inverted Silkscreen in Cadsoft Eagle

How to Create Inverted Silkscreen in Cadsoft Eagle

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If you’re one of EAGLE CAD fans, and you were wondering how some boards like Arduino boards have what’s called a negative silkscreen, hollow rectangles or shapes by text or logo, then you will learn how to do it with Ishaan’s video tutorial.

Ishaan used a ULP called “negasilk.ulp” in his tutorial. It is written by Christian Bohrer, and it can be downloaded here.

We’ve tested  this trick in ElectronicsLab using these steps:

  1. Adding some texts on layer 41tRestrict.
  2. Drawing a rectangular polygon in 1Top layer with width 8 mil (according to Ishaan, this ULP accepts only this width), and don’t forget to hit ratsnest.
  3. Run negasilk.ulp.
  4. A script file is generated in the same directory of your .brd file, open it and make the following modification using any text editor (adding layer 21 line).
    Set Wire_Bend 2;
    LAYER 21;
    GRID MM;
  5. Finally, delete the unwanted polygon and text from layer 41 and layer 1.

You can see these steps in the following GIF(click to view):

steps to generate inverted silkscreen
Steps to Generate Inverted Silkscreen In Eagle CAD

 


Embedded Hardware Engineer interested in open hardware and was born in the same year as Linux. Yahya is the editor-in-chief of Atadiat and believes in the importance of sharing free, practical, spam-free and high quality written content with others. His experience with Embedded Systems includes developing firmware with bare-metal C and Arduino, designing PCB&schematic and content creation.

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