Why we’re ditching hot air for IR heating in the fab
Think about how a standard convection oven works. You heat the air, and then that air eventually heats your wafer. It’s slow. There’s this annoying lag where you’re just sitting there waiting for the temperature to catch up. In a semiconductor fab, that waiting game is a killer. It eats your throughput alive. That’s why we’ve started swapping out those bulky air systems for infrared (IR) heating, tucked inside custom stainless steel housings. Cutting out the middleman The beauty of IR is that it doesn’t need air to carry the heat. It uses electromagnetic waves to hit the substrate directly. No more waiting for a whole chamber to warm up. It’s almost instant. When we’re planning a system, the “ramp-up time” is the only thing that really matters. A convection oven might take 20 minutes just to stabilize. An IR array? It hits the target in seconds. When you stop wasting time waiting for the heat, you can push way more wafers through the line every single shift. The hardware side of things We use high-grade stainless steel for the housings because the thermal stress is brutal. But the housing does more than just hold the lamps in place—it acts as a mirror. We polish the inside surfaces so any stray photons bounce right back onto the workpiece. The footprint is a huge win, too. You get rid of all those massive ducts and blowers, which frees up a lot of floor space. But there’s a catch. IR arrays pack a punch. They create intense, localized heat. If you skimp on the venting or pick undersized cooling fans, you’ll end up frying your control electronics. The reality of the shop floor You can’t just drop IR into a line and expect it to work perfectly on day one. It takes some tweaking. Convection is pretty forgiving, but IR is a different beast. If your lamp is off by just a few millimeters, you’ll get hot spots on your wafer. It’s a precision game. We build our setups so you can fine-tune the lamp angles, making sure the heat spreads evenly across the whole surface.