Why We Use Gold-Coated Housings to Stop Wasting Energy
When you’re processing semiconductor wafers, every single watt counts. If your housing walls are soaking up heat instead of bouncing it back, you’re just burning money and risking a mess with your thermal uniformity. That’s why we use gold-coated stainless steel. It’s a simple fix for a frustrating problem: we want every bit of that infrared energy hitting the wafer, not the walls.
The Magic of Gold (Basically)
Now, polished stainless steel is okay. It reflects some heat. But when you’re dealing with the short wavelengths of high-intensity infrared lamps, “okay” isn’t good enough. Gold is different. It reflects over 98% of that infrared energy. By adding a thin gold film to the inside of the heater housing, we basically turn the whole thing into a high-performance heat mirror. Instead of the housing absorbing the power and getting hot, the energy stays focused right where it belongs.
How We Build Them
We start with stainless steel. It’s tough, handles the weight, and doesn’t flake apart when things get hot. We then shape the geometry specifically to tighten the beam. The result? Your wafers ramp up to temperature faster. It’s a huge win for your cycle times. But, there’s a catch. Gold is a bit finicky. If your process uses corrosive gases or gets dirty, that coating will start to wear down. You’ll notice the reflectance dropping, and your efficiency goes with it. You’ve got to get your shielding right to keep that gold surface pristine.
Getting It Into Your Line
Installation is where things get tricky. You have to be precise. If your lamp is off-center by just a couple of millimeters, the focal point shifts. Suddenly, you’ve got hot spots on your wafer, and your yield takes a hit. We designed these to be drop-in replacements for your current thermal modules, but check your power supply first to make sure it can handle the peak load. And one last thing: double-check your cooling fans. Some heat is always going to bounce the wrong way, and you don’t want that stray energy frying your sensors.