Effective photoresist bake with IR

Thu, 18 Jun 2026 01:20:34 +0800

On the lithography floor, a 0.5°C drift in bake temperature is enough to scrap an entire lot. Soft bake is about pulling solvent out cleanly; hard bake is what locks the profile in. When thermal uniformity goes sideways, CD control falls apart and particle count climbs. What we built, and why it matters We put the bake module on short-wave NIR emitters with a quartz-enhanced thermal stack. That gives us wafer-level uniformity of ±0.1°C across the chuck, and setpoint stability that holds up around the clock. It’s cleanroom-compatible from Class 1 to Class 100, and it doesn’t shed particles during bake. Photoresist thermal budget comes out repeatable lot-to-lot, with temperature profiles that track the recipe exactly. Why this works on the line You run soft bake and hard bake on the same thermal platform, so you eliminate oven-to-oven shift. The process window tightens. Scrap drops. Energy use falls because IR heats the target, not the chamber. Reliability is baked in—components are rated for continuous duty, and the emitter array holds 5,000+ hours with under 5% output drop. Fewer interventions, fewer PM stops, and you get consistent line-of-sight thermal control for every wafer. What you need to plan for The module drops into existing tracks through standard mechanical and electrical interfaces, but it does need a dedicated 24V control line and clean, filtered cooling to keep the thermal envelope stable. Run a short qualification to map chuck-to-wafer offsets. Once that’s dialed in, the bake performance stays repeatable with minimal operator input.

Spin coater bake lamp

Sun, 07 Jun 2026 01:32:57 +0800

On the lithography floor, the bake isn’t a pause—it’s the line in the sand. Soft bake drives off the photoresist solvent. Hard bake locks in the mask image before etch. If the lamp starts to drift, you pay for it fast: non-uniform critical dimension, edge bead, and scum after development. That’s why the spin coater bake lamp exists—to take the thermal guesswork out of the equation. What matters under the hood We built the bake lamp around short-wave infrared in a quartz envelope, because it dumps energy straight into the photoresist layer, fast. The payoff is wafer-level thermal uniformity within ±0.1°C across the full coat diameter, and repeatability that holds lot to lot. Response time is sub-second, so the thermal budget stays tight and the bake profile follows the recipe without overshoot. It runs in Class 1–100 cleanrooms and is engineered for zero particle generation—because in this business, every airborne defect is a yield hit. Why it stays in production In day-to-day operation, this lamp keeps the bake window where it belongs: inside spec, not flirting with the edge. Soft bake and hard bake become predictable, so line-width control tightens and etch selectivity behaves the way it was designed. Scrap and rework drop, and you stop chasing drift between shifts. It’s also efficient, because the lamp heats the target, not the tool hardware around it. Add in the long service life and you get fewer hot-swaps and less unplanned downtime. Here’s what to watch for The lamp only delivers when the optical path stays clean and the mounting repeats the same focal offset. If the coater bowl or lamp window carries residues, expect a tighter process window—plan a preventive clean during the maintenance window. Make sure the lamp matches the tool’s voltage and connector, and verify the recipe temperature setpoint against actual wafer temperature with your standard thermocouple map.

Bake on Radiant Infrared Heating

Effective photoresist bake with IR

Spin coater bake lamp