The Virtual Nanofab
PreFab simulates photonic chip fabrication with foundry-accurate process models. Predict lithographic effects and process variation before tape-out. Eliminate design-manufacturing iteration loops and accelerate development with fab-aware optimization.
From Design to Fabrication Prediction
Predict how your photonic designs will change during fabrication. PreFab uses real foundry data to model process effects and variation, helping you identify manufacturing risks before tape-out.
Three Lines to Prediction
Load a GDS cell, choose a fabrication model, and predict its geometry. Use the results in your existing Python analysis and simulation.
import prefab as pf
device = pf.read.from_gds("chip.gds", "TOP")
prediction = device.predict(pf.models["SOI"])
Design with Agents
Rosette pairs a Python API and layout checks with context for coding agents. Review and refine their designs in a GPU-powered editor.
Fabrication-Aware Design
Verify, pre-compensate, and optimize photonic designs for the chip you’ll actually fabricate.
Simulate as Fabricated
Simulate predicted geometries in your optical solver to see how fabrication affects resonances, loss, and performance. Compare against the ideal layout before tape-out.
Pre-Compensated Designs
PreFab pre-distorts layouts to counter predictable effects such as erosion and dilation. Improve how existing designs fabricate without starting a full redesign.
Uncertainty, Made Visible
Fuzzy prediction edges highlight potential device-to-device variation. Identify sensitive features and explore how uncertainty could affect optical performance.
Fabrication-Aware Inverse Design
Put differentiable fabrication models inside your optimization loop. Optimize expected post-fab performance, rather than a geometry that only works in simulation.
Python Native
Work with GDS, images, and arrays in the Python tools you already use.
Rapid Iteration
Check fabrication effects during design, not after your first fab run.
Your Process
Custom models use your foundry data to reflect your fabrication process.
Design with Fabrication in Mind
Tell us about your devices, fabrication process, and design goals. We’ll help you find where PreFab fits in your workflow.