Cleaning on Direct Infrared Heating Supply

Post cleaning wafer infrared heater

Tue, 23 Jun 2026 01:16:04 +0800

On the line, you can do everything right up to post-cleaning and still bleed yield if the wafer dries unevenly or the bake drifts. Temperature nonuniformity shows up as watermarks, skinning, and edge bead. We built our post-cleaning wafer infrared heaters to shut those failure modes down, with repeatable thermal control right where it counts—on the wafer surface. What matters technically We run short-wave infrared with fast response and tight spectral control, matched to how water and photoresist absorb. That gives wafer-level uniformity within ±0.1°C across 150–300 mm substrates. Temperature repeatability holds at ±0.2°C shot-to-shot, so the steps that can’t tolerate drift—soft bake, hard bake, and post-cleaning drying—stay inside the thermal budget. The platform is built for cleanroom Class 1–100, with a particle-controlled design that doesn’t add particles during operation. Why it works in practice In post-cleaning, IR penetrates micro-features and drives off moisture without skinning, so you get immediate, residue-free drying. In lithography, the same platform stabilizes soft bake temperature, giving you repeatable solvent removal and film profile, then you can switch over to hard bake for solid curing. The fast ramp cuts cycle time, and tighter setpoints mean less scrap and rework. Energy use stays sensible, too—you heat the wafer, not the chamber. Here is what to plan for on install. You need to get the tool interface and exhaust routing right so cleanroom pressure and temperature stay stable. The heaters speak standard SECS/GEM, but if you’re dropping them into a legacy platform, expect a custom bracket and a calibration routine. Plan a short qualification run to map emissivity and confirm uniformity against your specific film stack.

Wafer carrier cleaning dryer

Mon, 01 Jun 2026 20:49:23 +0800

Out on the fab floor, you watch a wafer carrier come out of the cleaning bath, only to watch the drying step fight you. You know the drill—residual moisture, thermal stress, and airborne particles that punch straight through to yield and photoresist defects. Thermal uniformity isn’t something you get to gamble on. What actually matters under the hood This wafer carrier cleaning dryer holds ±0.1°C thermal uniformity across the chamber, so you don’t get hot and cold spots that wreck photoresist stability during soft bake and hard bake. It’s built for cleanroom Class 1–100, with laminar airflow and HEPA filtration that keeps particle counts below 0.3 μm at 99.99% efficiency. Zero particle generation isn’t a slogan—it’s a spec, and it’s verified with in-line metrology. Thermal profile repeatability stays within ±0.2% cycle-to-cycle, which is what keeps the process stable run after run, across thousands of wafers. Why this matters in lithography and photoresist processing Thermal budget is a hard boundary in lithography. This dryer keeps the photoresist layer intact, prevents edge bead, and removes TTOP variation that shows up when temperature gradients are left unchecked. The payoff is fewer rework lots, tighter critical dimension control, and line-width performance you can bank on. Energy use drops thanks to a high-efficiency recirculation heater and smart duty cycling—without slowing down ramp-up. What you need to plan for Plan on a dedicated 208 V, 3-phase power feed, plus a cleanroom exhaust tie-in to hold negative pressure. Installation is one shift, but you’ll need to run full thermal mapping across the carrier footprint during qualification. Set aside a 4-hour validation window to lock the process recipe and confirm uniformity across every slot.