Temperature sensor for wafer tool

Sun, 19 Jul 2026 15:43:31 +0800

Why IR Heating Beats Hot Air for Wafer Tooling

If you’re thinking about moving from hot air circulation to infrared (IR) heating in your deep processing, don’t think of it as just getting “better” gear. Think of it as reclaiming your time. Hot air is slow. It uses convection, which basically means you’re heating up the air and hoping the air heats the wafer. There’s always a lag. IR is different. It uses radiant energy to hit the substrate directly. It’s fast. Really fast. When you use hot air, you’re fighting thermal inertia. You have to wait for the entire chamber to hit a certain temperature before the wafer even begins to stabilize. It’s a slog. But with IR lamps? The response is almost instant. This is why we see it all the time in rapid thermal processing (RTP). You skip the middleman, hitting your target temperatures in seconds instead of minutes. Suddenly, that “waiting game” that slows down your entire fab line just vanishes. Then there’s the issue of consistency. Convection is messy. You get cold spots, or worse, turbulence that actually shifts the wafer. IR lets us zone the heat. Since we can control individual lamp banks, we can fix those annoying edge-losses. You end up with a thermal profile that’s actually flat across the whole surface. Now, it’s not all plug-and-play. IR packs a massive punch of energy. Because of that, your cooling jackets and sensors need to be up to the task. If your PID loop isn’t tuned for that kind of speed, you’ll overshoot your temperature and probably ruin the wafer. You can’t just toss an IR lamp into a convection chassis and call it a day. You’ve got to crunch the numbers on the thermal load for all the surrounding hardware first. Still, for anyone trying to squeeze more wafers-per-hour (WPH) out of their current cleanroom space, IR is the way to go. It turns a slow, lazy soak into a precision strike.

High precision temperature heater

Wed, 17 Jun 2026 15:36:34 +0800

On a 300mm line, the thermal budget isn’t a suggestion—it’s the line you can’t cross. Soft bake drifting by half a degree? You’ll see it in the photoresist profile. Hard bake missing the setpoint? Expect scum after develop. We built these heaters for that reality, because in the fab, every minute of unplanned downtime is a yield hit. What matters, technically We’re holding wafer-level thermal uniformity within ±0.1°C across the full bake range, and the ramp rates keep the thermal profile tight to the recipe. The chamber uses short-wave infrared elements with quartz isolation, so you’re not adding particles. Cleanroom particle counts stay stable at Class 1–100. Repeatability is baked into the control loop: same setpoint, same profile, lot after lot. Why it holds up in lithography In the track, consistent soft bake and hard bake are what keep critical dimension and sidewall angle under control. These heaters hold setpoints under 7×24 operation, and across multi-year deployments we’ve seen zero unplanned downtime. That translates to fewer scrap wafers, fewer rework lots, and cycle times that don’t swing around. The design is efficient—tight element coupling and low thermal mass—so you cut energy use without giving up temperature response. A few practical notes These units drop into standard tracks, but you’ve got to match thermal coupling to the platen and the tool’s mechanical interface. Plan a short commissioning run to tune the PID constants for your specific carrier and wafer stack. Once those numbers are dialed in, the process stays locked.

Temperature on The Infrared Heating Company

Temperature sensor for wafer tool

Why IR Heating Beats Hot Air for Wafer Tooling

High precision temperature heater