Klayout 25d View [upd] Link

Unlike a full 3D process simulator that models physical topology (like planarization or conformal etching), the 2.5D view is an extruded 2D view

, a popular open-source layout viewer and editor, provides a specialized feature known as the 2.5D View . This article explores what the KLayout 2.5D view is, its functionalities, and how to use it to debug and visualize your designs. What is the KLayout 2.5D View?

While powerful, the 2.5D view has limitations designed to maintain performance. klayout 25d view

| | Benefit in 2.5D | |--------------|----------------------| | Via overlap checking | Quickly see if a via correctly bridges two metal layers without toggling visibility | | Layer sequence understanding | Instantly grasp which layer is above another in the stack-up | | Design review presentations | Non-experts (e.g., packaging engineers) intuitively understand the layout | | Debugging DRC violations | Spot unexpected protrusions into forbidden Z-ranges |

A 25D (two-and-a-half-dimensional) view takes standard 2D layout shapes and projects them vertically based on user-defined height and thickness parameters. Unlike a full 3D process simulator that models

A 2.5D script is a variant of the KLayout DRC language. You can use boolean operations (like AND , OR , NOT ) to process polygons before extrusion.

The 2.5D View window flickered to life. Suddenly, the flat modulator wasn't just lines anymore. The silicon photonics layer rose from the floor of the screen like a translucent crystal city. Above it, the metal vias climbed like skyscrapers, reaching toward the passivation layer. While powerful, the 2

Generate intuitive, 3D-like screenshots for design reviews, documentation, and presentations with non-layout engineers.

A dedicated list on the right allows you to toggle specific material groups on or off, which is useful for "peeling back" upper metal layers to see lower-level transistor structures.

The 2.5D view in KLayout is a pseudo-3D visualization tool. It takes 2D layout geometries (such as polygons on specific mask layers) and extrudes them vertically based on a user-defined tech file or stack-up configuration.