Klayout 25d View Jun 2026

Visualizing stacked layers immediately reveals layout intent.

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By assigning thicknesses to different layers (e.g., metal1, vias, dielectric), designers can visualize the "topography" of the chip.

Once you drag the angle below 80°, you will see the polygons pop up into "walls."

In the context of KLayout, "2.5D" refers to the ability to render 3D geometry based on 2D polygons extruded by defined heights, often utilized through the Cross-Section View and the 3D Viewer . klayout 25d view

Here is a comprehensive guide to understanding, configuring, and leveraging the 2.5D view in KLayout to optimize your design-to-manufacturing workflow. What is the KLayout 2.5D View?

: True 3D structures with complex volumetric meshes, overhangs, and conformal mappings. 2.5D Layout : Polygons with coordinates are assigned a fixed -axis elevation (height above substrate) and a thickness (

Provides hardware-accelerated, smooth rotation and zooming. Best for large layouts.

Once rendering is complete, a new window pops up showing your design in a pseudo-3D perspective. Visualizing stacked layers immediately reveals layout intent

Open your GDSII or OASIS file ( File > Open ). Ensure you have a technology file loaded ( .lyp or .lyt ) so layers have proper colors and names, though this isn't strictly required.

Do you need help writing a for your specific layer stack?

👉 How to enable: View → 2.5D View (or press Ctrl+Shift+F5 )

The in KLayout is a feature that takes your 2D layout and extrudes it into a 3D-like representation by assigning thickness (height) and vertical positions (z-start) to specific layers. If you share with third parties, their policies apply

The 2.5D view isn't just a "one-click" magic button; it requires a bit of configuration to know how high to extrude each layer. Check Requirements : Ensure your version of KLayout is compiled with OpenGL support

It makes it much easier to identify missing vias, incomplete metal connections, or improperly stacked layers that would otherwise be hard to spot in a complex 2D view.

Check your layer setup table. If all your layers have an elevation and thickness of zero, they will render as flat 2D shapes.