Stop Wasting Power on Your Chamber Walls
If you’re heating silicon wafers, you know that every wasted watt is basically just burning money. Standard quartz lamps are a bit clumsy. They throw heat in every single direction, which means a huge chunk of your expensive power is just warming up the walls of your chamber instead of actually hitting the substrate. It’s inefficient. That’s why we use gold-coated twin tubes. The magic of the gold coating We put a thin layer of gold on the back of the quartz. Now, why gold? Because when it comes to infrared light, gold is just better than silver or aluminum. Think of it as a thermal mirror. Instead of the heat spraying out 360 degrees, the gold pushes everything forward. You get a concentrated beam of heat hitting the wafer, and you get it without having to crank up the current. It’s just smarter physics. Double the tube, double the punch The “twin tube” part is where the real muscle comes in. By doubling the filament surface area in the same small space, we can cram way more wattage into a shorter lamp. The result? A much denser heat profile. We usually set these up for high-voltage environments so the amperage doesn’t get out of hand, but just a heads-up: make sure your power supplies can handle those initial surge currents when you first flip the switch. Getting them to work in your setup The best part is that these are drop-in replacements. They fit right into your existing IR array sockets. No need to rebuild your whole rig. But here is the catch. Because the gold coating is so good at pushing energy forward, the “cold side” of the lamp stays chill, but the wafer takes a real beating. You’ll want to spend some time tweaking your PID controllers. If you don’t, you’ll likely overshoot your target temperature. Also, take a look at your cooling fans. If they aren’t built for this kind of intensity at the focal point, you might end up warping your fixtures. A little calibration goes a long way.