Quartz glass shield for fab lamp

Sun, 28 Jun 2026 06:25:46 +0800

On the fab floor, the photoresist bake is not a place to get cute. A ±1.5°C swing will move your critical dimensions and eat into overlap budgets in a hurry. The lamp shield is the quiet keeper of that thermal discipline—sitting between the energy source and the wafer, it either keeps the heat honest or lets variance sneak in. What matters, technically We build the quartz glass shield for fab lamps around two absolutes: temperature uniformity and particle control. The quartz composition gives you high transmissivity across short-wave and medium-wave IR, so the heat profile lines up with the photoresist absorption curve. The geometry is tuned to hold a stable isotherm across the wafer plane, keeping uniformity within ±0.1°C over the shot. In a Class 1–100 cleanroom, the joints are sealed and the surfaces are polished to keep micro-roughness down, so you don’t generate particles during bake cycles. The payoff is repeatable soft bake and hard bake profiles, shift after shift. Why it holds up in production You run lithography, track, and bake tools 24/7. When the shield keeps the thermal profile tight, you stop chasing CD excursions and yield hits. Process repeatability improves, rework drops, and the line settles into a predictable rhythm. The shield also keeps process byproducts off the lamp and optics, which stretches service intervals and cuts unplanned downtime. In practice, that means fewer lamp swaps, less wasted energy, and maintenance windows you can actually plan around. Here’s what to watch on install Tolerances are tight. The shield has to align squarely to the lamp focal axis and the bake-chamber geometry—misalignment as small as 0.5 mm can create edge gradients. Specify dimensions and connector compatibility to match your tool, and set up a schedule to inspect the mounting hardware so thermal repeatability stays consistent over time.

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Quartz glass shield for fab lamp