Introduced in version 0.28, the KLayout 2.5D View offers a semi-3D, extruded visualization of layers, bridging the gap between flat 2D GDSII files and complex 3D CAD modeling. What is the KLayout 2.5D View?
This is the most critical distinction. KLayout’s 25D view is . It does not simulate:
To see internal structures (like buried oxide layers or lower metal tracks), adjust the channel of your layer properties. Setting upper oxide layers to 30% transparency allows you to peer through the dielectric to see the conductor routing below. Hidden Geometry Performance Tweaks klayout 25d view
The 2.5D view is particularly valuable for backend-of-line (BEOL) debugging and verification:
Enable geometry merging options in the 2.5D setup window to reduce the polygon count sent to the graphics engine. Troubleshooting Common Issues Issue 1: The 2.5D window is completely flat or empty Introduced in version 0
Assumes vertical, Manhattan-style sidewalls for extruded shapes. It places flat layers on top of each other using specific height and thickness values.
: The viewer works best for small areas (around 100k polygons max). If your layout is huge, zoom into a specific "piece" or area before running the script. Navigation : Right-click + Drag : Rotate the view. Middle-click + Drag : Pan. Mouse Wheel : Zoom. KLayout’s 25D view is
One of the most underrated uses of 25D view is communication. Explaining a floorplan to a manager or a packaging engineer is difficult with colored 2D polygons. A 3D screenshot generated from KLayout instantly conveys the vertical hierarchy and density of the design.
Renders significantly faster than full 3D CAD engines, allowing you to parse massive GDSII files smoothly. Step-by-Step Guide to Setting Up KLayout 25D View
If you need a template to automate layer stack generation? The KLayout version you are currently running?
Click and drag with the Right Mouse Button (or Middle Wheel). Zoom: Scroll the Mouse Wheel. Cross-Sectioning and Clipping