Why we stress-test every single IR sensor (so you don’t have to)
We test every single IR sensor tube for withstand voltage (HiPot) and insulation resistance before it even thinks about leaving our floor. Why? Because in wafer fab, one tiny dielectric breakdown is a nightmare. It can fry a controller board or ruin an entire batch of wafers in a heartbeat. We aren’t interested in “sample testing” or “statistical averages.” We check every single unit. Period. The grit behind the testing Basically, we put the sensor’s insulation layers through a high-voltage stress test. We’re looking for the stuff you can’t see—microscopic cracks or tiny impurities in the quartz or ceramic housing. If there’s a pinhole leak in the coating, the current will arc. We call that “leakage current,” and it’s exactly what we’re hunting for. By pushing the voltage past the normal operating limit, we force any hidden flaws to show their face now, while the sensor is still in our hands, rather than inside your machine. Keeping things clean and safe Then there’s the insulation testing. This is all about the gap between the heating element and the grounded chassis. We look for those high mega-ohm values. It’s the only way to be sure the sensor isn’t leaking current into the wafer stage. When the insulation is rock solid, you don’t get stray currents messing with your IR readings. If that resistance slips, your readings start to drift, and suddenly you’re chasing ghosts in your data. Finding the sweet spot Here’s the honest part: there’s a trade-off. Strict testing is great for catching “infant mortality”—those parts that are destined to fail early. But if you push the voltage too hard, you can actually stress the insulation yourself. So, we spend a lot of time calibrating our limits. It’s a balancing act. We want to flush out every single defect without wearing down the long-term life of the sensor. At the end of the day, it means you get a component that won’t short out your power supply. Your gear stays online. We’d much rather deal with a failure in our lab than have you deal with one on your production line.