Temperature sensor for wafer tool

Fri, 17 Jul 2026 06:01:30 +0800

Keeping Your Class 100 Cleanroom Actually Clean

When you’re heating silicon wafers, raw temperature is only half the battle. In a Class 100 environment, one tiny piece of dust is basically a grenade—it can wipe out an entire batch of chips in seconds. That’s why we moved away from traditional resistive heaters. They tend to shed particles and “outgas,” which is a nightmare for purity. Instead, we use high-purity quartz IR lamps. It’s a much cleaner way to work. The secret is in the quartz. We use synthetic fused silica for these lamps. It’s a tough material that doesn’t freak out or leak impurities when you cycle the heat up and down. It just sits there, chemically inert and doing its job. We also focus on short-wave IR. This means the heat hits the wafer surface fast and hard, rather than wasting energy heating up the rest of your tool chassis. Getting the specs right These lamps are built for high power density. To keep them from burning out, we use a halogen-filled cycle. This stops the tungsten filament from evaporating too quickly, which keeps the inside of the lamp clean and helps it last longer. The result? A steady, reliable thermal profile across the whole wafer. But here is the catch: the seals have to be perfect. We use precision-machined end caps to keep everything gas-tight. If a seal fails, oxygen leaks in and the filament pops almost instantly. I’ve seen this happen way too often when engineers try to save a few bucks with cheap, off-spec connectors. Trust me, stick to the recommended tolerances. It’ll save you a massive headache. Making it work in your setup The best part is the “instant-on” heat. You aren’t sitting around waiting for the tool to warm up, which speeds up your whole day. Just keep an eye on your cooling. Because these lamps pack so much heat into a small space, your cooling manifolds need to be up to the task. If your airflow is off, you might end up warping the tool frame or frying your sensor leads. They’re designed to be drop-in replacements for most standard tools, so they’re easy to swap. Just a heads-up: make sure your power supply can handle that initial cold-start current spike. Halogen IR sources hit hard the moment you flip the switch.

Photoresist soft bake temperature IR

Mon, 08 Jun 2026 05:05:57 +0800

On the lithography floor, a soft bake that drifts even 2°C throws the photoresist thermal budget off. Solvent retention climbs. CD uniformity takes a hit. That difference is the line between a good lot and scrap. We built our infrared soft bake module to take that variability off the table. What matters technically The IR emitter uses short-wave quartz, heating the wafer surface directly—no contact. Temperature control holds ±0.1°C across the wafer, and repeatability stays within ±0.2°C lot-to-lot. The profile is quick: 15 seconds to stabilization, so you cut bake time without overshoot. Cleanroom Class 1–100 is supported by a particle-controlled design that keeps generation below 0.1 particle/cm². You get a lot of thermal output for the energy draw, and the module fits standard track footprints with 24/7 reliability. Why it works where you run it You run mixed nodes and thin resists, and soft bake sets the stage for exposure latitude and defect performance. Tight thermal uniformity cuts footing and scum, improving critical dimension control and reducing rework. The fast ramp shortens cycle time and keeps throughput steady during lot changes. Fewer bake-related excursions mean less time chasing parameters and more time shipping good wafers. Things to know Installation is straightforward on most tracks, but the IR path needs line-of-sight and a clean quartz window. Any film or residue scatters energy and skews the profile. The module also needs a stable power supply and cooling that matches the cleanroom HVAC envelope. Expect a short commissioning run to lock in the setpoint for your resist stack. Once that’s done, the process stays in control.

Temperature on Leading IR Heating Supplier

Temperature sensor for wafer tool

Keeping Your Class 100 Cleanroom Actually Clean

Photoresist soft bake temperature IR