Automated wafer drying heater

Thu, 02 Jul 2026 03:14:23 +0800

Out on the 300mm line, you learn fast that a sub-0.1°C drift in the drying/bake step isn’t a “small drift.” It moves critical dimension bias by nanometers and quietly pushes particle counts the wrong way. Automated wafer drying heaters aren’t just extra heat. They’re the thermal anchor for photoresist soft bake and hard bake, and for post-clean drying that decides whether the lot ships—or gets scrapped. What matters, technically We built the drying heater around a cleanroom-compatible thermal module that holds wafer-level uniformity to ±0.1°C across the chuck, with setpoint stability better than ±0.2°C over 24 hours. Temperature ramps are controlled to match photoresist thermal budget, so you don’t get solvent burst or skinning. The chamber and exhaust paths are laid out to shed zero particles, keeping ISO Class 1–100 environments in spec. Repeatability is ≤0.3°C drift between lots, which keeps the process window where it should be—run after run. Here’s why it behaves the way it does. In lithography and track integration, consistent soft bake controls viscosity and film stress, and consistent hard bake locks the profile before exposure and development. With this heater, you cut rework from edge bead and solvent trapping, and you stabilize CD and overlay by taking thermal variability out of the equation. The unit supports automated recipes, so operators hit the bake curves without guesswork, and energy use drops because the module heats only the defined cycle, not the whole bay. A couple of practical notes. Installation needs tight coordination with the track gas, vacuum, and exhaust interfaces, and the heater has to match your exact wafer size and chuck geometry. Plan a qualification run that maps temperature at process conditions, not just at idle. Once it’s aligned, the unit can run continuously, but it still needs scheduled calibration and filter checks to keep the uniformity and particle performance where they’re specified.

Automated on Warm IR Heater Store

Automated wafer drying heater