Getting Your PCB Curing Right with Gallium Iodide
If you’re working with photoresists in PCB fab, you know the struggle. You need the resist to cure perfectly, but you can’t just blast the board with heat or you’ll end up with a warped mess. That’s where our Gallium Iodide (GaI) lamps come in. They aren’t your typical IR lamps. They hit a very specific sweet spot in the UV and short-wave infrared range. The result? The energy goes straight into the resist layer without cooking the board underneath. Watch your heat. We’ve tuned these lamps to hit a precise wavelength so your photo-initiators actually trigger. But here’s the thing: when you crank up the wattage, these things get hot. Fast. You’ve got to be smart about your cooling fans and how fast your conveyor is moving. If a board lingers under the lamp for too long, you’re looking at burnt resist or a board that’s bent like a potato chip. Why we do it differently We don’t play the middleman game. We handle everything—from the quartz envelope to the actual GaI filling. It keeps the costs down for you, but more importantly, it keeps the quality steady. We use high-purity quartz because, let’s be honest, nobody wants a tube to pop in the middle of a high-volume shift. One dead lamp can ruin an entire batch of boards. To stop that from happening, we obsess over the gas pressure inside the tube. It ensures the light is consistent from one end of the lamp to the other. Setting them up (and keeping them running) These are basically drop-in replacements. You slide them into your existing curing tunnel, wire them to your power supply, set your timer, and you’re good to go. One quick tip:Clean your reflectors. Every few months, take a look at the mirrors. Dust builds up, and it kills your efficiency. When that happens, the lamps have to run hotter to get the same cure, which just wears out the filament faster. Keep the optics clean, and your lamps will last a lot longer.