Klayout 25d View Link

The 2.5D view is an feature that allows designers to visualize a 2D layout in a three-dimensional space by vertically extruding layers. Unlike a true 3D tool, it does not simulate process topology (like chemical-mechanical polishing or curved geometries), but rather displays the "stackup"—how different layers (metal, poly, silicon) stack on top of each other with assigned thickness and relative z-positions. Key Capabilities

According to the official KLayout documentation , the provides a semi-3D representation of a layout. It is important to understand that this is not a full 3D rendering engine; it does not model complex physical process topologies, such as tapered vias or surface curvature (non-planarization).

zz(options) block : Groups multiple z statements into a single material for easier display management. klayout 25d view

As integrated circuit (IC) designs grow in complexity, visualizing the physical layout becomes crucial. While 2D views are essential for editing, they don't always convey the vertical, three-dimensional relationship between layers, such as metal stack-ups or TSV (Through-Silicon Via) placements.

By exporting a net from the Net Tracer , you can visualize a specific electrical path as it moves vertically through vias and different metal layers. Colors in the 2.5d View - KLayout Layout Viewer And Editor It is important to understand that this is

For many specialized processes (like Sky130), a technology file must be properly loaded to define layer thicknesses and types.

: Assign highly contrasting colors to your layers in the 2D layout view before exporting to 25D. This makes tracking vertical via connections highly visual. While 2D views are essential for editing, they

While it looks 3D, the view is technically "two and a half dimensional" because it represents layers as vertically extruded solids with a fixed thickness. It does not model complex process topologies like step coverage or planarization effects, but rather focuses on the relative vertical dimensions of the material stack. Key Features and Capabilities

The 2.5D viewer allows you to rotate the perspective, giving a bird's-eye-view of the vertical structure.

The is an essential tool for layout designers, engineers, and researchers who need to visualize the complex, layered nature of modern ICs without the overhead of full 3D simulation tools. By transforming a 2D layout into a manageable 3D stack, it empowers users to improve their debugging workflow and gain a deeper understanding of their physical design.