Safety distance for wafer heating

Sun, 19 Jul 2026 09:20:21 +0800

Getting the Most Out of Your Wafer Heating

When you’re heating silicon wafers, it’s not just about cranking up the heat. It’s about where that energy actually goes. Think about standard quartz lamps. They throw radiation in every single direction. If you don’t have a reflector, you’re basically paying to heat up the inside of your machine’s chassis. Half your power just vanishes. That’s why we use gold-coated reflectors—to stop that waste and push the energy back where it belongs. Why gold? It’s simple. Gold handles infrared (IR) wavelengths better than almost anything else. Aluminum is okay, but it tends to oxidize and lose its shine when things get hot. Gold stays stable. It keeps that mirror finish, which lets us aim short-wave IR energy straight at the wafer. It means the power you’re pulling from the wall is actually hitting the target. The tricky part: Distance You can’t just jam the lamp right up against the wafer. If you do, you’ll get “hot spots.” One part of the wafer gets blasted while the rest lags behind, and that’s how you end up with warping or nasty stress fractures. You need some breathing room to keep the heat even. But there’s a catch: the further away you move the lamp, the more intensity you lose. Here’s the workaround. We use high-density gold coatings to make up for that gap. You get the best of both worlds—the uniformity of a wider space, but with the punch of a close-range lamp. The reality check Gold is great, but it’s not a magic wand. These reflectors are incredibly picky. A single fingerprint or a bit of process dust can ruin everything. It tanks your reflectivity and creates cold spots on your wafer. You’ve got to be religious about cleaning or keep the whole thing in a sealed chamber. And one last thing—keep an eye on your cooling. All that reflected energy bounces around, and if your cooling system isn’t up to the task, you might find your lamp housing getting way too hot.

Safety on Your Quartz Heater Source

Safety distance for wafer heating

Getting the Most Out of Your Wafer Heating