Each layer can be assigned a specific thickness and a z-offset (height from the substrate).
This guide covers everything you need to know to configure, optimize, and master the KLayout 25D View to bridge the gap between 2D IC layouts and 3D manufacturing realities. What is KLayout 25D View?
Ensure you have selected a specific region of your layout. Rendering an entire multi-gigabyte GDS file in 3D can crash your system or fail to load. Use the "Crop" or "Visible Region Only" option. klayout 25d view
If you'd like to explore this further, I can help you with specific examples of the 2.5D script syntax. The 2.5d View - KLayout Layout Viewer And Editor
The 3D view is completely black. Solution: You are likely looking from inside the substrate. Reset the camera ( View > Reset 3D Camera ). Also, ensure your "Background color" in preferences is not black (set it to dark grey). Each layer can be assigned a specific thickness
If your oxide layers obscure your metal lines, locate the layer list within the 25D panel. Turn down the of insulating layers to 20% or 30%. This makes the dielectric see-through, leaving your interconnect network clearly visible. Troubleshooting Common 25D Bugs The 25D Window is Completely Blank:
Consider a real-world scenario. A design engineer runs LVS (Layout vs. Schematic) and receives a mismatch in an analog block. The error points to an NMOS transistor that should have an N-well implant but does not. The 2D view shows overlapping polygons, but the hierarchy is deep. Ensure you have selected a specific region of your layout
To get the most out of your 2.5D analysis, combine it with KLayout's native display features:
Visual properties to differentiate materials like Silicon, Silicon Dioxide, Aluminium, or Copper.
# This script sets heights based on layer name keywords layout_view = RBA::Application.instance.main_window.current_view lv = layout_view.active_layerview
| Feature | KLayout (Free/OSS) | Commercial Tools (e.g., Calibre DRV, Virtuoso) | | :--- | :--- | :--- | | | Excellent (GPU accelerated) | Good (often requires high-end licenses) | | Physics Accuracy | Low (Geometric extrusion) | High (Often links to process files) | | Setup Cost | High (Manual .lyp setup needed) | Low (Often imports Tech LEF/ITF automatically) | | Cost | Free | High Licensing Fees |