Micro LED wafer drying heater

Tue, 23 Jun 2026 01:16:45 +0800

The moment a Micro LED wafer comes off cleaning, the clock is ticking. Residual moisture and thermal lag eat into your margins fast. Photoresist soft bake and hard bake need to land within ±0.1°C, or you’ll start to see linewidth control and adhesion drift. The drying heater has to deliver that precision without adding particles—and without breaking the line’s rhythm. What the tool has to do, plain and simple, is repeat temperature, recover quickly, and stay clean. We built our Micro LED wafer drying heater around short-wave infrared elements in a quartz-isolated chamber to pull the wafer to temperature fast, then hold steady. Wafer-level uniformity across the active area is ±0.1°C, and the ramp control keeps the thermal budget tight. It’s engineered for Class 1–100 cleanroom operation, with polished interiors and laminar flow geometry so particle generation stays at zero. Photoresist bake profiles stay consistent lot to lot because the control algorithm compensates for carrier mass and ambient drift. Reliability for 24-hour operation is built in, not just promised—we specify zero unplanned downtime during production windows. You’re running a line for yield. This heater shortens the drying and bake loop, cuts the wait between cleaning and lithography, and reduces scrap from edge bead and solvent retention. Energy use comes down because the heater cycles fast and holds setpoint without overshoot. Maintenance intervals stretch, too—low thermal mass and elements rated for thousands of cycles make that happen. One practical note on install: the heater needs a dedicated 240 V line and clean, dry air to maintain the purge path. Matching the tool footprint to your handler interface is non-negotiable, so plan the mechanical and electrical integration early. We provide dimensional drawings and pinout maps to make sure the fit and the process line up.

LED on Reliable IR Heating Elements

Micro LED wafer drying heater