Why we use gold to heat silicon wafers
When you’re heating silicon wafers, any watt that doesn’t hit the target is just wasted money. Even worse, that stray heat starts soaking into your machine frame, which is the last thing you want. To stop that leak, we pair carbon fiber infrared lamps with gold-coated reflectors. Now, aluminum reflectors are okay—they do a decent job. But gold? Gold is on a whole other level. The secret is in the bounce. Gold reflects infrared light way better than aluminum or silver. We put a thin layer of it on the reflector backing to catch the photons that would normally just drift off into the void. Instead, it kicks them straight forward. The result is a tight, intense heat spot and a much faster ramp-up. It’s efficient. Simple as that. The catch (because there’s always one) Here’s the thing: when you push that much energy toward the wafer, the lamp itself feels the pressure. The housing takes a real beating. You can’t just slap these in and walk away. You’ve got to make sure your cooling fans or liquid loops are actually up to the task. If your airflow is lazy, you’re looking at warped reflectors or filaments that burn out way too soon. Making it work in the fab We built these to be drop-in replacements, so you don’t have to rebuild your whole line to use them. And the best part? Because the energy is so focused, you can often hit your target temperatures using less total wattage. Your power supply will thank you. For the engineers on the floor, it just means shorter cycle times and heat that’s actually uniform across the wafer. It isn’t about having a “fancy” coating. It’s about making sure the heat actually goes where it’s supposed to.