R7s infrared heating bulb for fab

Fri, 19 Jun 2026 02:45:32 +0800

Out on the lithography floor, a 2°C drift in the photoresist bake is enough to shove critical dimensions by nanometers and turn a whole lot of wafers into scrap. The R7s infrared heating bulb was built to keep thermal behavior inside the window—where it belongs—not all over the place. What matters under the hood The R7s hits the photoresist and substrate with short-wave infrared, coupling the heat straight in. Setpoint comes up fast and stays put. Across the bake surface, wafer-level temperature uniformity is specified at ±0.1°C, which is what buys you repeatable soft bake and hard bake profiles, lot after lot. The quartz envelope and internal filament layout are worked out so you don’t get a particle burst every time you ramp up. In Class 1–100 cleanrooms, that keeps particle counts from jumping around. And you can count on output staying stable over 5,000+ hours with less than 5% drop—meaning 24/7 runs without constantly recalibrating. Why it fits the lithography process Lithography runs on a tight thermal budget. Over-bake pushes solvent out and shifts viscosity. Under-bake leaves edge beads that kill overlay. With the R7s, you get tighter control over temperature and time, so the same recipe lands the same way, batch after batch. That kind of repeatability cuts rework, lifts yield, and shortens cycle time. You also end up using less energy because the response is quick and losses are low. And the long service life means fewer hot-swaps and less downtime on the line. What to keep in mind The R7s is designed for standard R7s sockets, but the fixture has to match—reflector geometry and airflow need to align with the lamp’s thermal profile to hold that ±0.1°C uniformity. There’s a short warm-up window before setpoint settles, so line it up with the coater/track controller sequence. For the most consistent results, pair the bulb with a calibrated temperature sensor and a controller that can compensate for line voltage variation.

R7s on Warm IR Halogen Heating

R7s infrared heating bulb for fab