Uniform heating wafer dryer

Thu, 02 Jul 2026 08:19:18 +0800

On the fab floor, a 0.1°C swing during soft bake or hard bake is enough to drift CD, leave scum, and take yield with it. Conventional dryers fight across-wafer gradients and particle spikes that show up right after thermal transients. We built this wafer dryer to take that uncertainty out of the equation. What matters under the hood We hold wafer-level thermal uniformity within ±0.1°C by using short-wave infrared emitters in a quartz-isolated chamber that couples heat without shedding particles. The system runs in Class 1–100 cleanrooms, and we verify zero particle generation with in-line monitoring. Photoresist bake profiles stay repeatable, with setpoint stability within ±0.2°C, so critical dimension control and sidewall profile don’t wander. The heater architecture keeps substrate temperature decoupled from ambient swings, so every batch gets the same thermal budget, lot after lot. Why it fits the litho workflow In lithography and photoresist processing, the dryer directly sets linewidth, adhesion, and how much residual solvent you leave behind. Tight uniformity means less rework and fewer requalifications. Cleanroom compatibility and zero particle shedding keep defect counts down, and the uptime holds steady with no unplanned stops, so the line keeps moving. Energy use drops because the emitters ramp fast and idle at low power without drifting. The payoff is stable processes, fewer excursions, and cycle times you can count on. What you need on the install side The unit needs a dedicated, filtered power feed and a nitrogen purge path to keep particle performance intact at full temperature. Integration is straightforward on standard tracks, but you have to match thermal mass and connector orientation to the existing handler so there’s no mechanical interference. Plan a short qualification run to lock the bake recipe; once it’s set, the profile stays consistent across shifts and wafer lots.

Uniform heat for 300mm wafer IR

Sat, 06 Jun 2026 03:49:37 +0800

On a 300mm line, soft bake and hard bake aren’t just thermal steps—they’re yield gates. If your IR heat isn’t uniform, you’ll see linewidth variation, edge bead, and scum that survives cleaning. You can’t inspect your way out of that. Fix the temperature profile at the source. What matters technically We built the 300mm wafer IR heater around short-wave infrared, with engineered reflectors and closed-loop zone control. That gives wafer-level uniformity within ±0.1°C. That tight band protects the photoresist thermal budget across the whole film stack. The hot zone stays particle-controlled for Class 1–100 cleanroom integration, and we’ve verified zero particle generation against in-line metrology. Repeatability is baked into the design—setpoints return the same thermal profile run-after-run, lot-after-lot. Why it holds up in production In lithography bake tracks, uptime is the currency. This system is built for 7×24 with zero unplanned downtime, using thermal elements rated for long-life duty cycles and a thermal architecture that stays stable under mass-production load. The payoff is predictable CD control, fewer rework lots, and a process window that doesn’t drift, so scrap and requalification time drop. Energy use is optimized through fast ramp control and minimal idle losses, keeping operating cost down without sacrificing uniformity. What you need to plan for The system needs a dedicated power and coolant plan matched to the thermal load and cleanroom exhaust. Integration is straightforward into standard tracks, but the footprint and interface constraints are fixed—line up your tool layout and maintenance access before you finalize the floor plan. And schedule periodic calibration checks so that ±0.1°C stays traceable across wafer types and bake recipes.

Uniform on Custom Infrared Heating Builds

Uniform heating wafer dryer

Uniform heat for 300mm wafer IR