Why We Use Gold-Coated Heater Housings
When you’re heating silicon wafers, every single watt matters. If you’re using standard polished aluminum or stainless steel, you’re basically throwing energy away. Those materials soak up too much heat or scatter it in directions you don’t want. That’s why we go with gold. It’s not about making the hardware look fancy. It’s about the way infrared (IR) light behaves. Gold is just better at bouncing long-wave infrared radiation back where it belongs. Instead of the housing walls absorbing the heat, the energy hits that gold surface and snaps right back toward the wafer. It creates this intense, high-density heat zone exactly where you need it. The build matters. We start with stainless steel because it doesn’t warp when things get hot. Then we add that gold layer to create a mirror-like reflection. The result? You hit your target temperatures faster. Better yet, the heat stays uniform across the whole wafer. But you have to be careful with the geometry. If your measurements are off by even a couple of millimeters, you’ll end up with annoying hot spots. We spend a lot of time making sure the curvature matches the lamp’s focal point perfectly. One thing to keep in mind… Because these housings are so efficient at pushing energy into the product, the outside of the housing can get pretty toastie. You can’t just shove these into a sealed box and hope for the best. You’ll need active cooling or some serious airflow to keep your other electronics from baking. If you crank up the power but forget about the ambient heat, you’re going to burn through your lamp filaments way faster than you should.