On the lithography floor, soft bake and hard bake aren’t just steps. They’re the line between a pattern that repeats and a lot that ends up in the scrap bin. A 2°C drift across the wafer will move your critical dimensions, and particle generation during bake will kill yield. We built our near-infrared (NIR) heating platform to live in that reality. What matters under the hood We use NIR to drive energy straight into the substrate, fast. The goal is wafer-level thermal uniformity within ±0.1°C across the bake surface. That tight band keeps photoresist flow and solvent removal consistent, which helps overlay and CD control. Cleanroom Class 1–100 compatibility isn’t an afterthought. Sealed chamber interfaces, low-outgassing materials, and a particle-controlled airflow path keep particle counts flat while the system runs. Zero particle generation isn’t a tagline; it’s a design constraint, verified with in-line monitoring. Repeatability comes from closed-loop control. Temperature feedback is sampled at a high rate, and power is adjusted per recipe, per lot. Why it holds up in a production fab In high-volume work, bake repeatability cuts rework and excursions. You get stable photoresist profiles shift after shift, fewer SEM reviews, and tighter control over the thermal budget. The fast ramp-up shortens cycle time without messing up the profile shape. Energy use comes down because we only heat where it’s needed. Reliability is about uptime: components are rated for 24/7 duty, and maintenance is planned around scheduled lamp replacement, not emergency downtime. What you need to keep in mind NIR systems are sensitive to emissivity differences on coated wafers, and chamber geometry matters. Plan on a short commissioning run to lock in setpoints and sensor alignment, and make sure emissivity compensation is dialed in for your stack. Integration means matching mechanical interfaces and utilities to the existing track or a stand-alone oven footprint. Once you’re aligned, the process window is wide enough to run multiple photoresist families without retuning.