Stop Wasting Your Watts: Getting Wafer Heating Right
In semiconductor fab, wasting power isn’t just a budget issue—it’s a design flaw. When you’re heating a wafer, you don’t just want “more heat.” You want that energy to actually land on the surface where it belongs. That’s why we use gold-coated reflectors. It keeps the infrared energy from bleeding into the machine chassis and disappearing into thin air.
Why gold?
Most people start with polished aluminum or stainless steel. The problem? They let way too much energy leak out. Gold is different. It’s incredibly efficient at bouncing infrared radiation. Instead of the heat scattering everywhere, the gold coating pushes those photons right back toward the wafer. You get a much stronger heat flux without having to crank up the voltage and stress your system.
Dealing with the heat
Here is the best part: because the reflectors are so efficient, you can run your lamps at lower power settings and still hit your target temperature. Your cooling fans don’t have to work nearly as hard. Plus, your lamp filaments last longer because you aren’t pushing them to the limit. But you do have to be careful with your alignment. Since the energy is so concentrated, a mistake of just a few millimeters can create a hot spot. You’ll also want to double-check your PID controllers. These reflectors ramp up heat fast—really fast—so your settings need to be dialed in to handle that speed.
Keeping it running
We built these to be drop-in replacements. You can swap them into your current IR setup without messing with your power supply or rewiring anything. It’s a simple switch. Just a heads-up on the cleaning:gold is soft. If your techs go in there with abrasive scrubbing pads, they’ll scratch the coating and kill your efficiency. Don’t let that happen. Stick to a soft cloth and some isopropyl alcohol. Keep it clean, because once dust bakes onto that gold surface, it blocks the radiation and you’re right back where you started.