Keeping Your Vacuum Chambers Actually Clean
When you’re working in a Class 100 cleanroom, the smallest mistake is a disaster. One tiny flake of dust or a bit of chemical gas leaking during a heating cycle, and your wafer is ruined. Most standard heating elements just aren’t built for this. They leak binders or oxidize, which basically means they’re spitting contaminants right onto your substrate. That’s why we use high-purity synthetic quartz for our vacuum infrared lamps. It just stays clean. The deal with outgassing We use fused silica quartz because it doesn’t freak out when things get hot. Unlike regular glass, it won’t break down or release those annoying volatile organic compounds (VOCs) into your chamber. In a vacuum, a microscopic speck isn’t just “dust”—it’s a defect. By stripping out the impurities in the quartz envelope, we make sure you aren’t accidentally adding carbon or metal to your process. Power and heat Since infrared radiation doesn’t need a medium to move, it’s perfect for vacuums. We’ve designed these lamps for high power density, so you can ramp up the heat fast. The energy goes straight into the workpiece, which is great because it keeps your chamber walls from soaking up all that unnecessary heat. One heads-up, though: high-wattage tubes save you time, but they’re tough on your vacuum seals. Just make sure your gaskets can handle the local thermal expansion so you don’t lose your seal. Fitting them in We keep the connectors standardized. You can just drop these in without having to rewire your entire rack, which saves a lot of headaches. We also polish the quartz to a high finish. This stops “hot spots” from forming, which is usually what kills a lamp prematurely. If you’re running a high-vacuum system, do yourself a favor and check your cooling loop. These lamps pump a massive amount of energy into the target, and the ends can get hot enough to melt cheap wiring. Stick with high-temp leads so you don’t end up with a short circuit in your cabinet.