Voltage regulator for fab IR

Sat, 27 Jun 2026 04:49:55 +0800

On the fab floor, photoresist is a temperature creature. A 1°C swing in soft bake or hard bake will tug your critical dimension (CD) off target, and etch selectivity takes a hit. Treat the IR heating stage like a generic heat source and you’re asking for trouble—lamp voltage stability is what actually buys you wafer-level thermal uniformity. What matters under the hood We spec the voltage regulator on the fab IR to keep lamp output locked in, even when the line voltage drifts. That holds wafer temperature within ±0.1°C across the bake surface. The payoff is repeatable soft bake and hard bake profiles, with photoresist solvent removal staying where it should. Cleanroom Class 1–100 is covered by keeping materials low-outgassing and the architecture tight—no blackbody debris, no particles migrating back to the wafer or the coat track. Why this matters in lithography Thermal budget isn’t negotiable. Stable IR power keeps photoresist flow consistent and preserves etch mask integrity, which means fewer reworks and fewer excursions. You get process repeatability lot after lot, with tighter CD control and yield that doesn’t chase temperature. Energy use drops because the regulator kills overshoot and settles the duty cycle, and uptime improves when thermal-related alarms stop lighting up over small swings. What you need to get right The regulator plays with standard quartz-halogen and short/medium-wave IR sources, but you still have to match lamp geometry and the thermal mass at the stage. Installation means tight integration with the bake module wiring and the thermal feedback path—re-tune the PID loop after the retrofit, or you won’t hit that ±0.1°C performance. Run a short qualification to lock in the profile for your photoresist stack.

Voltage on Leading IR Heating Supplier

Voltage regulator for fab IR