Why we test every single piece of gear (and why it matters for your fab)
In a high-precision fab, one tiny electrical leak is all it takes. One. That’s enough to scrap a whole batch of wafers or bring your entire line to a screeching halt. That’s why we don’t do “batch sampling.” We don’t just test a few random parts and hope for the best. Every single lamp and heating element that leaves our shop goes through the ringer with 100% withstand voltage (Hipot) and insulation resistance testing. Pushing the limits Here is how it works: we push each unit well past its normal operating voltage. If a lamp is rated for 220V, we hit it with something much higher. Why? Because we want to find the weak spots now, not later. We’re looking for microscopic cracks in the quartz or a bit of dust on the electrodes—the kind of stuff that looks fine to the eye but causes a short circuit the second you wire it up on your floor. The “invisible” stuff High voltage is only half the story. We also obsess over insulation resistance to keep leakage current in check. In a cleanroom, parasitic currents are a nightmare. They mess with your sensitive sensors and create grounding headaches you just don’t need. We make sure the resistance between the live terminal and the chassis is rock solid. The balancing act Now, there’s a catch. If you go too aggressive with Hipot testing, you can actually stress the insulation and damage a perfectly good part. It’s a bit of a tightrope walk. We calibrate our tests to be high enough to kill the “lemons,” but not so high that we wear down the healthy gear. The result? You get a component that isn’t going to burn out because of some factory fluke. Just do me a favor: check your own machine’s grounding. Even the best-tested lamp in the world will fail if your chassis is floating or your bonding is sloppy.