Near infrared (NIR) emitter bulb

Sat, 27 Jun 2026 01:54:25 +0800

On the 300mm line, linewidth control lives or dies in the soft bake and hard bake. A 2°C drift on the hotplate zone will wreck yield in a heartbeat. You need a thermal source that can match the scanner’s repeatability—not just a heater. What matters, technically We run a near infrared (NIR) emitter bulb that hits wafer-level thermal performance with ±0.1°C uniformity across the chuck. It dumps heat fast, radiant, without touching the wafer. The spectrum is tuned so photoresist absorbs hard, and the substrate doesn’t get dragged along. That keeps the thermal budget in check. It lives in cleanroom Class 1–100: sealed quartz envelope, geometry that sits clean in the laminar flow. We verify zero particle generation in-situ, and the lamp pulls 5,000+ hours with less than 5% output decay—so the uptime is there, 24/7. Why it works where it counts In the lithography bay, the NIR bulb swaps out for legacy halogen and medium-wave sources. Bake time drops, and setpoint stability holds through both soft bake and hard bake. The repeatability on photoresist profiles improves because you’re heating the film directly, not the mechanics around it. Power draw falls since NIR couples efficiently, and you stop swapping lamps as often, which cuts unplanned downtime. It’s a drop-in fit, validated against international equipment specs—no need to requalify the whole stack. What you need to keep straight The emitter needs matched drivers and closed-loop control. Open-loop will drift on you—don’t even try. There’s a short warm-up to hit spectral stability, and mounting has to respect the specified standoff from the wafer plane. Quartz envelope—treat it with ESD-safe handling. When you keep it aligned to the process window, the bake profiles stay stable, scrap drops, and maintenance cycles become predictable.

(NIR) on Custom Warm IR Heater Builds

Near infrared (NIR) emitter bulb