Bake on Infrared Glass Heating Technology

Photoresist soft bake lamp

Wed, 01 Jul 2026 12:53:57 +0800

On the litho floor, soft bake temperature drift doesn’t show up as a glaring failure. It shows up as line-width variation, solvent hanging around in the resist, and scrap that shows up hours after the fact. What you need is a lamp that holds the photoresist thermal budget right where the recipe calls for it—cycle after cycle. What matters, technically We run near-infrared (NIR) emitters with a spectral output shaped to cut through the resist quickly and evenly, so you don’t get a temperature split between the surface and the bottom of the film. Wafer-level uniformity hits ±0.1°C across the bake zone, which translates straight into repeatable viscosity and consistent coating behavior. The system stays up continuously with zero particle generation—cleanroom-compatible from Class 1 to Class 100. Output stays stable over 5,000+ hours, with intensity drift under 5%, and the thermal profile repeats from lot to lot. Here is why that matters in production: fewer reworks and less exposure to contamination. Tighter thermal control cuts down on solvent trapping and edge bead issues, so CD control stays tighter and you don’t have to trim as much. Energy use drops because NIR heats the resist directly, not the chamber walls. Reliability is built for 24/7 running, with thermal ramps that match the process recipe without overshoot—keeping the lithography sequence moving, without unplanned stops. A couple of practical notes. NIR intensity falls off with distance, so the lamp-to-wafer gap has to be fixed and calibrated at install. Expect a short warm-up to hit setpoint stability, and plan maintenance around emitter life so your schedule doesn’t drift. Make sure the tool is compatible with your coater/track interface, and verify the bake recipe against the lamp’s response time so the process window stays in spec.

Spin coater bake lamp

Tue, 02 Jun 2026 06:07:05 +0800

On the lithography floor, a half-degree drift in bake temperature is enough to scrap an entire wafer lot. Soft bake and hard bake aren’t just heat cycles — they’re dimensional controls. If the lamp can’t hold setpoint across the whole wafer, CD uniformity falls apart, and yield goes with it. We built the spin coater bake lamp around near-infrared (NIR) quartz halogen. It gives you fast, direct thermal response and stable radiant output. The system targets wafer-level uniformity within ±0.1°C, and the repeatability keeps solvent removal consistent, run after run. The lamp assembly is rated for cleanroom Class 1–100. A sealed optical path and low-outgassing materials keep particle count flat. Output stays stable for 5,000+ hours, with less than 5% intensity drift, so your thermal budget doesn’t drift with time. Here’s why it holds up in a spin coater environment: fast ramp, tight dwell, and an immediate return to setpoint between wafers. You get shorter bake cycles without overshoot, lower energy per lot, and fewer rework masks caused by footing and scum. The payoff is predictable CD control and fewer excursions tied to bake variability. NIR gives you speed and uniformity, but the lamp needs clean power and precise optical alignment. Voltage ripple or a misaligned lamp will show up as hot spots. Before you install, verify the spin coater’s lamp socket and thermal interface. Plan on periodic intensity calibration and window inspection. That’s what keeps the ±0.1°C uniformity where it needs to be, month after month.

Polyimide bake infrared lamp

Mon, 01 Jun 2026 02:29:58 +0800

On the line, the clock doesn’t wait for anyone. A 300 mm wafer flows from coat to soft bake, then into exposure, and the thermal budget you set in those first minutes writes the rules for CD uniformity, sidewall angle, and—bottom line—yield. When the bake lamp starts to drift, throws hotspots across the field, or fails outright, the line stops, the queue backs up, and your cost per wafer climbs before the first pattern is even written. Polyimide bake comes down to repeatable heat. You have to drive the resin into the right Tg window without solvent burst, without skinning, and without adding particles. Infrared can deliver that control—fast and stable—but only if the emitter, optics, and control loop are treated as one thermal system, not a box with a heater bolted on.