Quartz glass shield for fab lamp

Thu, 18 Jun 2026 01:24:47 +0800

On the fab floor, photoresist bake performance isn’t up for debate—it’s measured in nanometers. A 0.5°C drift will throw off critical dimension control fast, and that’s a lot of wafers to lose. The quartz glass shield on the fab lamps is there to stop that drift before it even shows up. What matters, technically We spec the shield out of high-purity quartz because it holds stable transmission across short-wave and medium-wave IR, and it doesn’t grow much under rapid thermal cycling. That gives us repeatable wafer heating with ±0.1°C uniformity across the exposure field, so soft bake and hard bake profiles stay consistent lot after lot. In Class 1–100 cleanrooms, the material and joint geometry are designed to shed zero particles, keeping defect counts off the wafer and out of the yield report. Why it works in litho Lithography lines live or die on thermal budget control. This shield keeps lamp output stable, cuts hot spots, and keeps process byproducts off the lamp envelope, so the same setpoint delivers the same bake energy. The payoff is fewer reworks, less scrap, and fewer surprises on downtime—plus, we don’t waste energy because the heat stays where it should. You get longer lamp life and predictable replacement intervals, not a 2 a.m. scramble. Here’s what to watch Installation is straightforward, but alignment is tight. The shield has to seat to the specified datum without any distortion; even a little misalignment can introduce shadowing and eat into uniformity. The operating window is broad, but the shield isn’t rated for direct solvent contact during wet-bench cleaning. Stick to the recommended dry cycle and keep up with preventive maintenance, and you’ll hold performance—and cleanroom compliance.

Shield on Cozy Corner Infrared Heating

Quartz glass shield for fab lamp